Lt1 Crank No Start

No K-Member spacing is required or hacking or cutting. LT1 Cold Start Up info (if you have issues) V8 LT1 Engine, Exhaust, and Bolt-Ons Those crank times will shorten a starters life big time. Problem 2: Engine Cranks but Will Not Start Probable Cause(s): • No fuel or incorrect fuel • Engine in crank-without-inject mode • Needle valve open • Engine oil level low • Restriction in air intake system • Cold ambient temperatures • Batteries not providing sufficient voltage 1. 4L Cranks but No Start I would think it would be an early '94. The LT1 uses a new engine block, cylinder head, timing cover, water pump, intake manifold and accessory brackets. no shipping, buyer must load all items. I looked and don't see anything disconnected and I checked the fuses that would apply (ignition, fuel pump) and all are good. This can happen after running into a store (still warm) or leaving it over night (cold). 7L (1995-2005) (at: autotecnico-online. Hey everyone, figured I'd post this here as it's for a 93 Camaro with an LT1 engine. But the LT1 crank is balanced differently to accommodate lighter pistons. Sometimes when i try and start it the engine will let out a hiss from the intake, like a little backfire. Cranks OK, but No Start Checklist for Fuel Injected Mustangs A word about this checklist before you start: it is arranged in a specific order to put the most likely failure items first. Re: Lister LT1 - Won't Start - Compression? Your memory serves you well, it's 28-31 thou. That will save you time, energy and money. Connector pigtail assemblies to replace original General Motors (GM) vehicle and engine wire harness sensor connectors. When you try and start it and stop cranking the engine will continue to turn over for a short time, but very slowly (almost like it is dieseling). If the RPM is reading below 150-rpm, charge the battery. 5 liter flat-plane crank with the C8. written by Alex Afrashteh. I didn't mess with the painless harness much being that I really just ran lights and such The car had a. When it does start, sometimes I have poor throttle response & power, but runs OK-ish. TDC is TDC no mater where you move the gears. 85/ brand vs brand. Please call for custom ECM and/or Fuse Box Location, extra Length. Easy fast test in gage pto and try to crank Release brake and try to crank. Cranks but don't start lt1; Change cap rotor wires plugs distributor coil cranks but won't start My 1991 fleetwood cadillac fwd AC blows cold but not strong. 94 lt1 wont start. The crank sensor would absorb heat when the engine was shut off, go open and fail to produce a signal when the engine was cranked. When it goes to start you can here the solenoid engage and the teeth must be engaging the flywheel as the lights all dim and if you hurry you can smell the motor heating up under the hood. car cranks but hard to run. LT1 engines. I try the PC123 sensor with new wiring, no crank reading at all, obviously. OK I have a 94 road master w/ LT1 that I am trying to get ready for demo-derby. Once you shut it off then try to start it, same thing. 1994 Caprice 5. The car will sit for the time I'm in the gym maybe an hour and then won't restart. But the LT1 crank is balanced differently to accommodate lighter pistons. Below you will find links to harness information. lt1 tach wiring - Lt1 Tach Wiring - Mar 06, 2005 · LTX and LSX - LT1 Wiring for dummies - Can a moderator please put a STICKY on this and lock it, people are sending me a ton of emails on this and I don't have time to reply to all so I figured this will be a greater help to people: This will work for the 92-95 LT1s If. I never feel like it's going to stall of leave me stuck when it's running, even if down on. My brother left to sea on the USS Nimitz and left me with his ski boat. Yesterday, it finally quit and cannot start the engine. Upgrading to Gen III LS-Series PCM: Sensors and Inputs Guide includes instructional photos, checklists, and step-by-step instructions on upgrading to the GM Gen III LS-Series PCM, ECM, Electronics, and POWERTRAIN CONTROL SYSTEMS. I have a96 caprice with a LT1, car died out when driving. I am suspicious of the computer and the harness as the guy who modified it, Jeff Roberts, was far from the best. '96 The LT1 picked up 10 extra HP in the F-body cars with the addition of a second catalytic converter. 30,000 Replaced clutch master and slave cylinder a little awhile ago. The car will sit for the time I'm in the gym maybe an hour and then won't restart. The Tensioner should cost between $45 and $65. 1 in stock. In a "dead silence on key turn" no-start situation, this solenoid could be bad. What's happening: Occasionally my car wont start. By purchasing this kit, you are buying an assembly you can count on to deliver guaranteed turn-key performance. 030 OVER, SCAT BALANCED CRANK SHAFT 6. I am suspicious of the computer and the harness as the guy who modified it, Jeff Roberts, was far from the best. 125 bore block and add stroke. It will crank but won't start. This is a discussion on Wont Start!!!No spark, but have fuel within the General Help forums, part of the LSx Technical Help Section category; Alright, I am trying to tackle a no start issue, and need some input. No K-Member spacing is required or hacking or cutting. 1994 Caprice 5. 93 Corvette LT-1. FREE SHIPPING! ATI 918856 - 2016+ LT1 A Body CAMARO SS & LT4 ZL1 & CTSV CADILLAC. car cranks but won`t start C4 Corvette on TPI and LT1 engines its located on the pass side fuel rail. (And makes no attempt to fire). Below you will find links to harness information. I would start be jumping directly to the solenoid to test the solenoid and starter. Additionally, when turning the key to start itonce you release the key it continues to try and start. now Im looking at getting a callies dragonslayer crank but not sure if I want to spend the money. Start with a Dart SHP 4. IF you bolt it to the hub, not the ring, it should read pretty good, but it'll be prone to dirt and stuff messing with the sensor, like an external MSD crank trigger would. We Start With A Brand New GM Aluminum Block And Fill It With Top Shelf Callies/Compstar 4340 Forged Steel Crank And Callies/Compstar H-Beam Rods w/ARP 2000 Bolts. Have a friend crank the engine with the key. The Coils, crank sensor and camshaft sensor are connected as well as all the original LT1 sensors and actuators. 1997 FORD F250 w/ 351W Gasoline - No Start - No Crank Permalink Got a 1997 Ford F250 pickup with the 351W engine 4X4 that was towed in at the begining of the week. No matter what the cause of this no-start problem might turn out to be, your warranties (there are several of them) should cover the problem in its entirety, and since most new cars come with complimentary roadside assistance, I believe that you should also have free towing to a Chevy dealership. Since 2008, our 24x LT1 conversions have been eliminating the optispark distributor and transforming LT1 engines. Lets start with a little bit of PCM/Harness info. It is part of GM's Gen V Small Block engine family and was first introduced in the 2014. poor condition- faulty front differential and possible transfer case. Engine Cranks But Won't Start What's causing the no-start? All engines require three things to start and run: spark, fuel, and compression. The fuel pump is on and seems to be working fine. Wiring TO & FROM crank sensor/Holley HP EFI ECU is correct/working properly (+12V &. Fuel Pressure Leak-Down Test. Battery is good, only a few months old. I checked the fuel, did a complete tune up (knowing it MUST be the cap or button). Typically my car will start fine when it's been sitting overnight. In states requiring emissions testing comparable to CARB regulations, putting an older engine in a newer vehicle is an illegal swap and will not pass testing requirements. My friend just picked up a 93 Z28, 77k miles, not running. 94 Caprice Classic cranks slowly (350 cid LT1) the starter I suspect. My symptoms are similar, but the failure to start only happened once so no clear pattern yet. camaro 350 5. it will then idle at 1000. Hey everyone, figured I'd post this here as it's for a 93 Camaro with an LT1 engine. 2016+ LT1 CAMARO SS & LT4 CAMARO ZL1 & LT4 CADILLAC CTS V Options: Choose from none up to a 21. There may be little as frustrating as a car that won’t start. I have a96 caprice with a LT1, car died out when driving. A bad crank sensor will cause a crank-no-start condition, not a no-crank. I've stopped an engine from turning before by removing the #1 spark plug and filling the cylinder with rope or cord. Connector pigtail assemblies to replace original General Motors (GM) vehicle and engine wire harness sensor connectors. In this tech article CAR CRAFT shows you how to build a Chevrolet LT1 engine step-by-step with performance parts including cylinder heads, camshafts, intake manifolds, headers, and an ECM reflash. After filling with 6 gallons of gas it cranks but will not start. LT1 engines. I'm looking at this as a sub $1,000 option to get my car v8 powered for now. help Sent from my SAMSUNG-SM-G891A using Tapatalk. OBD II makes its debut this year. You probably want to try that test over again, maybe with a longer screwdriver. Here I am checking injector pulse a 1992 Chevy truck. Hey wondering if anyone here has any insight into what's going wrong with my LT1. Get some good heads you can afford there's lots to choose from Cranks and rods are a no brainer get strong quality rods/cranks from a companys no one hates or starts with an E and add some induction suitable. net » Forums » 1992 - Up: Aeros & Whales » 4. 1990 corvette LT1 engine starts, does not come off idle without stalling. 7l lt1 3 Answers. Then I found this thread and determined that the CEL was not coming on so I hoped it was. Get it as soon as Fri, Sell on Amazon Start a Selling Account:. Hey 94M6HardtopZ, As far as I know, all LT1's have a solid windage tray from the factory. About the PCM: You want to see if the CEL comes on immediately when the key is "on" before you crank it. I believe the injectors are not getting the signal to fire. I'm at work and I'm unable to leave to go trouble shoot, she states the car will crank but won't start. the crank pulley sensor needs to be aligned with the back edge of the 11th tooth on the wheel. The LT1 camshaft is in the same position as that found in the original small block motor introduced in 1955 - in the center of the block. Powerbond Balancers FHL1481-SS LT1 Steel Crank Flange for Chevrolet Caprice/Impala. Maybe aftermarket like EFI connection. Hey guys, I have been working on my LT1 swap into the '71 for quite some time now and finally I tried to fire it up but is cranks and will not start. It turns over but does not fire all the way up. I've moved all the LT1 links onto this page to clean things up a little bit. My LT1 Engine Won't Start The LT1 is a V-8 engine that GM used in various models through 1996. All accessories shut off as usual, but no crank. Here's what you need to do to find out the cause of your problem, and get your car back on the road. An area often overlooked is the performance of the fuel system not while the engine is running, but when it is shut off. I checked the fuel, did a complete tune up (knowing it MUST be the cap or button). LT1 with xfi 2. Replaced fuel pump, screen, fuel filter, starter, battery, optispark, had coil checked as well as icm checked, checked spark to all major sensors maf, map, iac, tp sensor, checked for spark in coil, an spark plugs. Now the car will not start without starting fluid. Tried two new crank sensors. I have this posted on the other forumbut no answers yet. '94 LT1 Camaro won't run (will crank) I tried to start it this evening and nothing, it cranks but doesn't even seem to want to start. As you know to scrap this and start over is going to be expensive. In this tech article CAR CRAFT shows you how to build a Chevrolet LT1 engine step-by-step with performance parts including cylinder heads, camshafts, intake manifolds, headers, and an ECM reflash. If you have spark, it's either fuel delivery or timing. She didn't realize this and kept driving for about 5 miles and then the car died and refused to start again. 12555887 LT1/LT4 Roller Timing Set Roller Chain (95+ LT1) or 94 + B-body. The LT1 doesn't use a harmonic balancer like a regular small block Chevy. Another way is just to use a 24x reluctor bolted to the crank damper. Most Cranks but Does No Start Conditions have their root cause in the Ignition System. 1994 - 1997 LT1 / LT4 Stand Alone Engine Harness. ECU Modifications. The 24X reluctor crank sensor has a black connector plug, the 58X reluctor sensor connector is gray in color. LT1 Streetcars has 6,636 members. The keyway is a problem area because the LT1 uses a stepped crank key arrangement. The LT1 and LT4 do not have crank position sensors because the Optispark relays both cam and crank position to the ECM. I have a 96 Caprice with an LT1 that ran perfect before needing a boost. UPDATE: Oct,28,2019 Ok for those trying to use the tricky USB C-to-C type chargers, they will not work at this time without using a USB-A to C adapter. GM says discard and replace. Blue smoke during deceleration or on start up – Bad valve stem seals (valve guides). 2007 Chevrolet Colorado LT1 2WD REGULAR CAB PICKUP 2-DR, 2. I had my cables with me and I got someone to stop and give me a jump. 2L 12pt PN 134-1103 at 21 Motorsports. Engine cranks but won't start. Heads and Cam Install Guide for a 1994 LT-1. Camaro and Firebird: How to Replace the Starter. The high pressure fuel line is stainless steel and it seems perfect. 5 L 4 cyl, AWD, S/R Cajun Red Tintcoat/Black 2010 Equinox LTZ 2. turn the ignition on to start and run the car, it is hard to run. The 2014 Chevrolet Impala has 3 problems reported for engine won't crank/start. Car would crank for days but wouldn't even try to start. It uses 8 LS1 coil packs which you would also have to purchase along with some other parts. 4 v6 will crank but no start ,no fuel, no spark and not seeing rpm on gauge crank censor tested good and cam was runninf great when turned truck off this happened once before a week ago but it finally started up but not this time been troubleshooting it for three days fuel pump is good also. Re: '94 Camaro 3. Been haunting me forever. When it does start, sometimes I have poor throttle response & power, but runs OK-ish. Her guys, Need y'all's input. 1 specifications. Make it exotic and upscale. Cranks but won’t start. skipping missing inconsistently, did the whole electrical system including opti spark and dist. Driving down the highway my Z28 experienced symptoms of running out of gas; which was possible (I am embarrassed to say). Questions and Answers. Intermittent stalling/starting problem. Camaro Crank but no start was created by aknight_sa HISTORY Engine was working normall but suddenly started to loose power. No, it's not seized or you wouldn't be able to crank it and if the connecting rod broke, you could probably find it sticking out the side of the engine. Situations where the engine won't start can be extremely difficult to diagnose, but you c. I DROVE this car down to my shop 3 weeks ago (it did not want to start, but did) now it won't fire up. The lights and radio, etc. I looked and don't see anything disconnected and I checked the fuses that would apply (ignition, fuel pump) and all are good. The ignition coil pink wire is getting 12V but I don't seem to be getting any sparks in the wires. Does anyone know if an LT1 based crank can go. 7L LT1,will not crank or start. Additionally, when turning the key to start itonce you release the key it continues to try and start. In this tech article CAR CRAFT shows you how to build a Chevrolet LT1 engine step-by-step with performance parts including cylinder heads, camshafts, intake manifolds, headers, and an ECM reflash. I would start be jumping directly to the solenoid to test the solenoid and starter. He changed the starter and solenoid and. This kit includes the "mechanical/hard" 24xLink components that generate the 24x Crank and 1x Cam signals necessary for a 24x Gen III PCM conversion on 92'-97' LTx engines. In the rare instance you do get it to start, if you turn it off, it will not start again (anywhere from an hour to two weeks or more). I have the OLD EARLY 2 row style reluctor with matching L21 BBC crank sensor, it reads on the HPT scan tool and also the positive and negative cam sensor count are perfect. “Next time out, we are shooting for 9. My symptoms are similar, but the failure to start only happened once so no clear pattern yet. Reyman started this discussion by commenting that the LT1’s intake port is very large – over three square-inches at its largest cross-section. All started with a bad pulley which threw my serpentine belt. The new complex camshaft supports variable valve timing, giving the LT1 engine three camshaft profiles to choose from. 93 Corvette LT-1. ive tried 2 different batteries in the car with the same results. I?m really OUT of any options. totally different motor. 30 over blower pistons for a buildup that I will never do. This way I can also add more specific LT1 technical information to this page. Also includes links to relevant forum topics on the code. She didn't realize this and kept driving for about 5 miles and then the car died and refused to start again. Click "Test Com" button and be sure it is communicating properly. My thought is that i need to figure out everything the LT1 needs to run and then go back and recheck it all, especially electrical. There is no ECU control of the starter, it's a fairly simple system. just replace the crank and call it good. 94" on the LT1 and 2. The LT4 is introduced as an option in the Corvette only and was rated at 330hp. it will then idle at 1000. I have direct power at the brand new starter but no power in the yellow wire leaving it, with ignition on. This upgraded design, based on the traditional (since 1955) small-block V-8, marked a significant step forward for GM, as the engine was designed to be a modern, efficient, computer-controlled powerplant from the start. Fuel Pressure is about 50# & good flow. The 94-95 LT1 do not use crank trigger but can bolt on 96-97 timing cover with crank trigger sensor, for that matter I think it bolts to all SB chevy engines. I'm looking at this as a sub $1,000 option to get my car v8 powered for now. The check engine light came on briefly but then went off. Intermittent stalling/starting problem. If the coupling is even slightly out-of-round and not replaced, you may end up replacing the water pump a second time somewhere down the line. To help aid in a successful installation, I have. i have a problem with a lt1, it will start and die after a few seconds of running. Engine was built by Katech. It will crank just fine, but won't fire. You probably want to try that test over again, maybe with a longer screwdriver. I am running an LS1 computer. FULLY BALANCED LT1. crank over but not start) Over the weekend I replace plugs, wires, ing coil, crank sensor, ing module. There were no nicks,burrs,scratches on crank and it mic fine. Once running, the engine requires a constant flow of gasoline and good spark to keep that fuel igniting. I checked the output of the distributers and there is nothing. It keeps the piston from reaching TDC and stops the crank from turning. All started with a bad pulley which threw my serpentine belt. It will crank but not fire. This article will show you how to replace one. Those early LT1 were notorious for electrical gremlins. He says GM’s cylinder head designers have moved away from concern over port velocity because with direct injection inlet velocity is no longer crucial for maintaining fuel in suspension. Reluctor wheel is centered in hole correctly. As to your problem, a cam sensor can cause a crank no start. Those early LT1 were notorious for electrical gremlins. So now I still have my same issue. 030 OVER, SCAT BALANCED CRANK SHAFT 6. Although every reasonable effort has been made to ensure the accuracy of the information contained on this site, absolute accuracy cannot be guaranteed. When it does start, sometimes I have poor throttle response & power, but runs OK-ish. I think the spark timing is way off. With how power has exploded and the continued increase of hybrids, not. Genuine Original Equipment Manufacturer (OEM) connectors by manufacturers like Delphi, Molex, Yazaki, Bosch, Kostal, and more. That would explain the no start problem when the engine was hot. 4th Gen LT1 F-Body Technical Aids ~For 1995 F-body unless otherwise noted~ (not a list of parts for sale) Diagrams ~Providing 4th gen LT1 tech on the 'net. Battery is good, only a few months old. 10126039 95+ LT1 Link-Chain Timing Set Cam Sprocket or 94 + B-body. camaro 350 5. But the LT1 crank is balanced differently to accommodate lighter pistons. 12555887 LT1/LT4 Roller Timing Set Roller Chain (95+ LT1) or 94 + B-body. 94" on the LT1 and 2. I now have a no start issue. While the original '92-97 LT1 was not a high-output motor, the reverse is true of LT1 crate engines from Golen Engine. The 94-95 LT1 do not use crank trigger but can bolt on 96-97 timing cover with crank trigger sensor, for that matter I think it bolts to all SB chevy engines. 5) My wife ran into a snowbank at low speed and ruptured the radiator. In this tech article CAR CRAFT shows you how to build a Chevrolet LT1 engine step-by-step with performance parts including cylinder heads, camshafts, intake manifolds, headers, and an ECM reflash. The revised rocker cover rail is due to the taller intake port opening. The keyway is a problem area because the LT1 uses a stepped crank key arrangement. If you turn 12,500 RPM (on purpose or not), our high-performance balancers/dampers can handle it. You may need to use your palms or fists. See details above for all the actual specs of this assembly. 7 LT1 Runs great while driving ,then i shut it off and wont start until sits 3 hours then runs great ive replaced the plugs …. Has injector voltage pulses on at least one cylinder. This upgraded design, based on the traditional (since 1955) small-block V-8, marked a significant step forward for GM, as the engine was designed to be a modern, efficient, computer-controlled powerplant from the start. I'm at work and I'm unable to leave to go trouble shoot, she states the car will crank but won't start. Good thought, battery. When I turn the key forward I hear the fuel pump energize. 0 & xim ls coils wont start i can not move the crank sensor any more up its maxed out on the bracket and anymore ill be hitting the water pump. I've moved all the LT1 links onto this page to clean things up a little bit. have a 1994 Roadmaster with a lt1 engine it turns over but want crankim gettin spark from the plugs and when i spray the. I am looking for wh. Are forged cranks necessary in performance engines? Yes they are in many incidences. I recently had a problem with my car stalling when warm and not starting at all until cooler. 0" SCAT RODS. The harmonic damper also does not interchange; it is a unique damper/pulley assembly. '96 The LT1 picked up 10 extra HP in the F-body cars with the addition of a second catalytic converter. Not all engines are suitable for reboring, notably those made from aluminium with liners in the cylinders but most cast blocks can be rebored to a higher capacity after a stress test is performed. Blue smoke during deceleration or on start up - Bad valve stem seals (valve guides). It has been running great and I drove it the dayIt has been running great and I drove it the day. Your battery must be fully charged to perform a proper test. Please call for custom ECM and/or Fuse Box Location, extra Length. Not bad at all when you crunch the numbers and realize that this is a 71-percent increase over the LT1's highest production power rating of 300 horsepower. If you have a no start condition or if the L-98 starts. still nothing. Does anyone know if an LT1 based crank can go. '96 The LT1 picked up 10 extra HP in the F-body cars with the addition of a second catalytic converter. Tried two new crank sensors. I belive that can not be that expensive to build reliabaly, or is it a money pit to build the block for 7k rpm with nos? Am I missing something here? I guess I'll start with any sugestions for 1 pc LT1 crank for 7k - 8k rpms and nos / pros vs cons of 3. Not bad at all when you crunch the numbers and realize that this is a 71-percent increase over the LT1's highest production power rating of 300 horsepower. Here are some: Stalls at idle, stalls when I put the clutch in, stalls when I turn a corner, misfires, surges, no power, cuts out, no power at top revs, runs rough, etc. I think the spark timing is way off. Called local Chevy dealer and one of their older techs said yes that year was known to have that problem. Tried spraying carb cleaner directly into partly open throttle body and engine did not fire. i have a problem with a lt1, it will start and die after a few seconds of running. If the RPM is reading below 150-rpm, charge the battery. stock for stock sure maybe kinda similar, LT1 aluminums ported, valved and polished, no contest better. No, it's not seized or you wouldn't be able to crank it and if the connecting rod broke, you could probably find it sticking out the side of the engine. OBD II makes its debut this year. But ,,, the battery is easy to check. Plus, gadgets found elsewhere: direct injection, variable valve timing and…wait for it…another try at displacement on demand for a V8. Genuine Original Equipment Manufacturer (OEM) connectors by manufacturers like Delphi, Molex, Yazaki, Bosch, Kostal, and more. After replacing a bad optispark no start condition persisted. what we found was the purge solenoid was stuck open allowing fuel to seep in tp the eng while fueling, this was flooding the. The PCM introduced in the 1994 Corvette, Camaro and Firebirds forthe LT1 engine accomplishes the same functions as the earlier models in much the same way, but there are some significant differences. 1990 corvette LT1 engine starts, does not come off idle without stalling. The LT1 uses a new engine block, cylinder head, timing cover, water pump, intake manifold and accessory brackets. When you try and start it and stop cranking the engine will continue to turn over for a short time, but very slowly (almost like it is dieseling). By decreasing the cold start crank time, the extremely critical first two minutes of emissions output is greatly reduced. Caprice - 1989 Caprice,Cranks but won`t start? - My 89 Caprice has been hard to keep runnung right after starting, won`t idle and then yesterday it just won`t start - period. 7L pick up, van or SUV is not that hard. Below you will find links to harness information. starter cranks fine. 3 Wiring Harness Info if there is a condition where there is a bad crank sensor, fuel pump will come on, turn off, and will not. ) You turn the key, the engine does not spin/crank but the starter makes a consistent clicking noise due to lack of voltage. Maybe aftermarket like EFI connection. It sounds like it may be throwing the code, and infact ingaging the anti-theft portion of the computer, and not letting it start. I would start be jumping directly to the solenoid to test the solenoid and starter. It has been running great and I drove it the dayIt has been running great and I drove it the day. Start engine, then release accelerator pedal, run engine for 5 seconds Turn ignition "OFF" for ten seconds Restart engine and check for proper idle operation It is NOT recommended to to push or pull on the pintle of an IAC that has been in service. My thought is that i need to figure out everything the LT1 needs to run and then go back and recheck it all, especially electrical. it is all from a 94 vette. high-energy ignition system for the LT1 that did not use the. I believe the injectors are not getting the signal to fire. Here's what you need to do to find out the cause of your problem, and get your car back on the road. I have direct power at the brand new starter but no power in the yellow wire leaving it, with ignition on. Wiring TO & FROM crank sensor/Holley HP EFI ECU is correct/working properly (+12V &. will crank,start and move. 10128346 LT1 Link-Chain Timing Set Crank Sprocket. i have a problem with a lt1, it will start and die after a few seconds of running. for item information look at attachment document in this (description) section. Engine cranks very slowly, almost doesnt start, sometimes starter disengages/re-engages. If you were familiar with 049/781 heads the chamber shape would be a dead giveaway that these are not either of those castings. Just ran my AAW classic update on my 69 Camaro and the car will crank but not turn over. stock for stock sure maybe kinda similar, LT1 aluminums ported, valved and polished, no contest better. Ships free to the US within 1 business day. 125 bore block and add stroke. starter cranks fine. Hey guys, I have been working on my LT1 swap into the '71 for quite some time now and finally I tried to fire it up but is cranks and will not start.