01 ls1 cranks no start
Thread Starter
Teching In
Joined: Jun 2009
Posts: 23
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From: Orlando,Fl
01 ls1 cranks no start Ok guys I need some advice. I have a 01 camaro ls1 6 spd. the issue I'm having is it will crank but will not start. I have tested and changed the crank and cam sensor as well as plugs and wires, fuses and relays are new also. I've also tested for injector pulse etc and ran injector test with a tech 2 all sensors are reading normal ,fuel pump and pressure is normal as well. I have checked and changed just about everything even the entire charging system battery cables. I have gotten it started for a few seconds but that's it I believe it may be a vats issue. Because its only spark that I'm losing. I changed the PCM out to see if anything would change still the same thing. Also vats is bypassed at the ignition with a resistor. I'm thinking about getting vats tuned out or getting a bypass module if you guys think this will help plz let me know what you think. Any help would be much appreciated thank you.
Ok guys I need some advice. I have a 01 camaro ls1 6 spd. the issue I'm having is it will crank but will not start. I have tested and changed the crank and cam sensor as well as plugs and wires, fuses and relays are new also. I've also tested for injector pulse etc and ran injector test with a tech 2 all sensors are reading normal ,fuel pump and pressure is normal as well. I have checked and changed just about everything even the entire charging system battery cables. I have gotten it started for a few seconds but that's it I believe it may be a vats issue. Because its only spark that I'm losing. I changed the PCM out to see if anything would change still the same thing. Also vats is bypassed at the ignition with a resistor. I'm thinking about getting vats tuned out or getting a bypass module if you guys think this will help plz let me know what you think. Any help would be much appreciated thank you.
Also, your VATS will disable the starter so if it is cranking, it shouldn't be VATS related.
Thread Starter
Teching In
Joined: Jun 2009
Posts: 23
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From: Orlando,Fl
I've tried swapping the relays. I had my father in laws shop look at it. They're not really familiar with these cars. They just told me its losing spark posibbly from the ignition side. That's why I'm wondering if vats is messed up or if its something else ignition related like I said we got it going before but it shuts off after a few seconds.
I've tried swapping the relays. I had my father in laws shop look at it. They're not really familiar with these cars. They just told me its losing spark posibbly from the ignition side. That's why I'm wondering if vats is messed up or if its something else ignition related like I said we got it going before but it shuts off after a few seconds.
Have you checked the critical grounds on the back of the driver's side head?
If you can't pinpoint it, you might want to take it to the Dealer or at least LSx shop that is familiar with these cars.
Thread Starter
Teching In
Joined: Jun 2009
Posts: 23
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From: Orlando,Fl
Ok so I switched out the ignition switch the part that's on the lower part of the steering column not the lock cyl. Still nothing I decided to check the voltage at the crank harness again to make sure the cam and crank coils etc were getting proper voltage. The crank sensor harness voltage was below 2 volts so do I possible have a short in the harness or would Something else cause this. all the other sensors have proper voltage.
Well, here are the pinouts for a 99, but I"m assuming it is the same for 01:
Sensor connector pinouts:
A - yellow to PCM C1 44 outut signal to PCM from sensor
B - yellow/black to PCM C2 22 low reference (ground)
C - light green from PCM - 12 volt signal - PCM C2 62
I would check what reading you are getting from the PCM on the light green wire. Normally this points to a bad PCM but you already replaced that. Maybe try looking for the PCM ground?
The other possibility is you have a broken/damaged reluctor wheel on the crankshaft...that would not be fun but has happened.
Sensor connector pinouts:
A - yellow to PCM C1 44 outut signal to PCM from sensor
B - yellow/black to PCM C2 22 low reference (ground)
C - light green from PCM - 12 volt signal - PCM C2 62
I would check what reading you are getting from the PCM on the light green wire. Normally this points to a bad PCM but you already replaced that. Maybe try looking for the PCM ground?
The other possibility is you have a broken/damaged reluctor wheel on the crankshaft...that would not be fun but has happened.
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I had a situation that was the same as yours. If it's VATS, it won't crank, so I doubt that's it.
I ran all the tests I could think of. I checked fuel pressure, crank position sensor readings, etc. My problem was the ignition relay. My car randomly started shutting off sitting at a light. With the new relay, I haven't had any problems since. Just give it a new one a shot. They are cheap.
I ran all the tests I could think of. I checked fuel pressure, crank position sensor readings, etc. My problem was the ignition relay. My car randomly started shutting off sitting at a light. With the new relay, I haven't had any problems since. Just give it a new one a shot. They are cheap.
Teching In
Joined: Aug 2013
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From: denver
cranks but no start I am having the same exact problem , except I have a 01 3.8 automatic . I pulled the engine and replaced rods and mains put it back together and it cranks but no start . I replaced the cps , the control module under the coil packs,plugs,wires,checked fuses and relays, checked grounds and even added one from frame to casting the module is mounted on.I am getting the signal from cps to the module and the injectors but no spark at the wires , 3 coils cant go bad at the same time can they?
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