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Old Nov 7, 2010 | 07:57 PM
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Default LSX Engine Help

Guys, I have a problem with an '01 LS1 with TSP MS4 cam, and PRC stageI LS6 heads is giving me problems. I can't figure out what the problem is. When I turn the car on, and it worms up, it starts to backfire and the engine vibrates a lot. When I try giving it some gas it just stumbles/hesitates and will only go very slow. The check engine light came on and it's saying something about all the coil packs being bad or something. At first I thought it was the wire touching the headers EGR pipe, so I wrapped both the egr pipe and the wire, and the problem still continues. What can be the problem? Can the coil packs really be all bad?
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Old Nov 7, 2010 | 08:35 PM
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Originally Posted by jordan89
Guys, I have a problem with an '01 LS1 with TSP MS4 cam, and PRC stageI LS6 heads is giving me problems. I can't figure out what the problem is. When I turn the car on, and it worms up, it starts to backfire and the engine vibrates a lot. When I try giving it some gas it just stumbles/hesitates and will only go very slow. The check engine light came on and it's saying something about all the coil packs being bad or something. At first I thought it was the wire touching the headers EGR pipe, so I wrapped both the egr pipe and the wire, and the problem still continues. What can be the problem? Can the coil packs really be all bad?
Maybe you should get rid of the WORMS.

Post the codes your getting and get some worm medicine ready.
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Old Nov 7, 2010 | 09:00 PM
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Originally Posted by jordan89
Guys, I have a problem with an '01 LS1 with TSP MS4 cam, and PRC stageI LS6 heads is giving me problems. I can't figure out what the problem is. When I turn the car on, and it worms up, it starts to backfire and the engine vibrates a lot. When I try giving it some gas it just stumbles/hesitates and will only go very slow. The check engine light came on and it's saying something about all the coil packs being bad or something. At first I thought it was the wire touching the headers EGR pipe, so I wrapped both the egr pipe and the wire, and the problem still continues. What can be the problem? Can the coil packs really be all bad?
A little more info would be helpful. Is this a fresh install, or was the car running fine, and this just started? There is no EGR on a C5, so I can only assume you mean the AIR...not sure what wiring would be resting on that.

If this is a new head swap, then you probably have an issue with G107(which provides a ground for the coil packs), behind the left head.

http://forums.corvetteforum.com/c5-t...e-grounds.html
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Old Nov 7, 2010 | 09:04 PM
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Originally Posted by dougbfresh
Maybe you should get rid of the WORMS.

Post the codes your getting and get some worm medicine ready.
:bbI meant to say warm. That must be how angry this car is making me and how stressed out I am right now. I'll try to pull the codes in a few.
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Old Nov 7, 2010 | 09:06 PM
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Originally Posted by lucky131969
A little more info would be helpful. Is this a fresh install, or was the car running fine, and this just started? There is no EGR on a C5, so I can only assume you mean the AIR...not sure what wiring would be resting on that.

If this is a new head swap, then you probably have an issue with G107(which provides a ground for the coil packs), behind the left head.

http://forums.corvetteforum.com/c5-t...e-grounds.html
The car was running perfectly fine before and this problem just started about a week ago. This is actually an '01 Z28. I tried posting this same question over on the LS1 forum, but got no help at all, so I posted it here. The install was actually done about seven months ago. That wire behind the head has been giving me some problems, so I might have to check it again.
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Old Nov 9, 2010 | 12:35 PM
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Default Got The Codes

I finally was able to go out and pull the codes. They're all ignition coil related codes:
-P0351 Ignition Coil A Circuit P0352
-P0352 Ignition Coil B Circuit P0353
-P0353 " " Coil C Circuit P0354
-P0354 " " Coil D Circuit P0355
-P0355 " " Coil E Circuit P0356
-P0356 " " Coil F Circuit P0357
-P0357 " " Coil G Circuit P0358
-P0358 " " Coil H Circuit P0351

I tried turning the car on a couple of minutes ago and it comes on for a second or two, but cuts off immediately.
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Old Nov 9, 2010 | 02:06 PM
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Sounds like a bad common ground, I think each bank has it's own fused power.
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Old Nov 9, 2010 | 05:30 PM
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Originally Posted by jordan89
That wire behind the head has been giving me some problems, so I might have to check it again.
Might? I would think it would be your first choice.
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Old Nov 9, 2010 | 05:48 PM
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Originally Posted by lucky131969
Might? I would think it would be your first choice.
Will do. That's going to be a PITA, but I have to do it. Thanks guys for all of your help.
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Old Nov 9, 2010 | 06:33 PM
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Originally Posted by dougbfresh
Sounds like a bad common ground, I think each bank has it's own fused power.
So it can be a fuse that is blown?
I just got back from checking the ground behind the cylinder head and it appears to be connected. This is getting annoying.
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Old Nov 9, 2010 | 06:59 PM
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Originally Posted by jordan89
So it can be a fuse that is blown?
I just got back from checking the ground behind the cylinder head and it appears to be connected. This is getting annoying.
Yep, a guy in the last day or so had a blown fuse on bank one from a frayed injector wire.
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Old Nov 9, 2010 | 07:52 PM
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Originally Posted by dougbfresh
Yep, a guy in the last day or so had a blown fuse on bank one from a frayed injector wire.
And is that one of the big relays that controls the coils? I'm going to have to find a way to test them.
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Old Nov 9, 2010 | 08:57 PM
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NO, there should be 2 fuses in the fuse box.
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Old Nov 9, 2010 | 09:19 PM
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Originally Posted by dougbfresh
NO, there should be 2 fuses in the fuse box.
OK. I'll make sure to check them tomorrow. Thank you.
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Old Nov 9, 2010 | 10:43 PM
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Originally Posted by jordan89
OK. I'll make sure to check them tomorrow. Thank you.
Reality check. You have codes for both banks. Both fuses cannot be bad, or it would not run at all.
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Old Nov 10, 2010 | 10:37 AM
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Originally Posted by lucky131969
Reality check. You have codes for both banks. Both fuses cannot be bad, or it would not run at all.
It actually stopped running now. It use to turn, and stay on before, but now it won't even stay on. It comes on for a second or two and then cuts off right away. I'm going to have to check those fuses, and if that's not the problem I'm going to have to check the wire harness. Does anybody know how many ground wires the coils have and where they're located?
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Old Nov 10, 2010 | 01:22 PM
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Originally Posted by jordan89
It actually stopped running now. It use to turn, and stay on before, but now it won't even stay on. It comes on for a second or two and then cuts off right away. I'm going to have to check those fuses, and if that's not the problem I'm going to have to check the wire harness. Does anybody know how many ground wires the coils have and where they're located?
I provided this information in post #4.
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Old Nov 10, 2010 | 11:42 PM
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Originally Posted by lucky131969
I provided this information in post #4.
Thank you very much. I'll have to go ahead and make sure I check all of these.
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