found the problem but its very weird!! -- need some help
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Joined: Oct 2002
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From: Mefis
Originally Posted by Classic
Hmm, I just had a thought -- since the exhaust basically ends at the downpipe (shortly after the 02 sensor) could ambient air be getting to the 02 sensor causing it to dump fuel? Similar to running just open headers without turndown kind of scenario maybe.
I think you have found your problem. The O2 sensor sees al that fresh air and tries to compensate by adding fuel like crazy. See what happens with the 02 sensors unplugged.
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From: East Side Performance! mASShole
I used to throw O2 code all the time when i had the cut outs open. to much air or something. That is why i got rid of them. I had so many tunes in my car, that i wouldnt doubt if something is screwed in the tune, my computer was messed with by 3 people befor NOGO got ahold of it, but every time we tried to tune we found somthing weired that was fixed by no go. It was ls1 edit by 3 people, and had a power programer befor. befor i start tuning with N2O im going to flash it back to stock, and start all over. that might be somthing you need to do. take it back to stock and modify your stock files to work with the cam and injectors. see if that works. The only difference between your car now and my car is the Cam, and the exhaust, and the open loop deal, it is my old turbo set up, my heads, my injectors, and my tune. My car never did that... I dont know what to say besides the open loop thing.
I tried calling, but the number i have is blocked by some pre paid calling card thing. Give me a call if you need.
I tried calling, but the number i have is blocked by some pre paid calling card thing. Give me a call if you need.
Thanks to everyone! I have a few things to try now that I'm going to work on over the next few nights. I believe I have found a leak/crack/hole in the #2 primary. It has heat wrap on it right now and it is also on the bottom not vissible from the top so tonight I am going to pull it off and check. If thats the case then looks like we have a solution!
I'll keep you guys posted and will let you know when it runs and makes some good numbers!
I'll keep you guys posted and will let you know when it runs and makes some good numbers!
It seems like your gonna try this, but just bolt on a pipe and extend it from you down pipe a few feet. Also, just more fact finding info if that does nothing, I with swapping coil packs. Its cpu control relate in some way I'd gander.
Last edited by Jammer; Aug 3, 2004 at 09:38 PM.
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Verdad Gallardo I did put an extension on the downpipe this evening and it did absolutely nothing. So I decided to take that side apart AGAIN (kind of sad really -- I can now get that side completely out in less than an hour 
). So once I got everything out, I took the heat wrap off and no surprise -- couple spots where it looks like it is leaking/cracked/whatever. So its going to the shop tomorrow to get "patched up" and also to fix that downpipe a bit to make it work till I get my ypipe once it runs well enough to drive to the exhaust shop. Hopefully if all is well, and if this is the only problem, it will be running this weekend 
Good news is that even though that bastard got super hot, nothing melted or fried!! Starter, plugwires, or the wiring harness runing down the side (allready heat shielded from header install LONG ago). Could be because of the way I have my plug wires routed (they basically lay on the motor mount area and come UP to the plugs -- coil packs relocated to the front of the car) oh and the heat shield **** on there (looks like it works!).
Everyone pray for me that this is the problem so I can get this beast on the road.
Then all I need to do is take the nose off and make some modifications to get some more air to that intercooler
). So once I got everything out, I took the heat wrap off and no surprise -- couple spots where it looks like it is leaking/cracked/whatever. So its going to the shop tomorrow to get "patched up" and also to fix that downpipe a bit to make it work till I get my ypipe once it runs well enough to drive to the exhaust shop. Hopefully if all is well, and if this is the only problem, it will be running this weekend Good news is that even though that bastard got super hot, nothing melted or fried!! Starter, plugwires, or the wiring harness runing down the side (allready heat shielded from header install LONG ago). Could be because of the way I have my plug wires routed (they basically lay on the motor mount area and come UP to the plugs -- coil packs relocated to the front of the car) oh and the heat shield **** on there (looks like it works!).
Everyone pray for me that this is the problem so I can get this beast on the road.
Then all I need to do is take the nose off and make some modifications to get some more air to that intercooler
Thats kind of what I figured. It probably started out as a small leak and then ended up cracking more during my attempts to figure out the problem due to the rapid heating and cooling.
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iTrader: (37)
Joined: Nov 2002
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From: East Side Performance! mASShole
I dont think that is it, I ran in the 10's with cracked headers. It sounds to me either pcm/o2, or a turbo problem. I would run it with no turbos and see. that will narrow it down.
I feel like an ***, this never happend on my car, i realy hope you or anyone else thinks i sold a junk kit. It was fine on my car till about 10-12 psi. i just couldnt get it tuned over 600 rwhp with 16+ psi so thats why i sold it.
I wish i could help more!!! Let me know, i think id try pulling the turbos, if it is the problem and turbo tech wont take car of it, I will pay to get them fixed, i feel bad this is happening. i thought the hardest part for you would be getting all the little stuff worked out, fittings, plug wires ect. Please let me know
I feel like an ***, this never happend on my car, i realy hope you or anyone else thinks i sold a junk kit. It was fine on my car till about 10-12 psi. i just couldnt get it tuned over 600 rwhp with 16+ psi so thats why i sold it.
I wish i could help more!!! Let me know, i think id try pulling the turbos, if it is the problem and turbo tech wont take car of it, I will pay to get them fixed, i feel bad this is happening. i thought the hardest part for you would be getting all the little stuff worked out, fittings, plug wires ect. Please let me know
Brad, you have been VERY helpful throughout this process. Believe me I in now way think you sold me junk! From what I understand the way you had it set up without the 02 sensors, a crack wouldn't cause the same problem. But since I am running 02 sensors it is causing serious problems.
I got the manifold back from my local shop today and it was cracked in a few places (one at the flange for the turbo) so I'm almost positive this is going to fix the problem. I got the manifold on the car tonight and threw a new set of plugs in it and then tomorrow after work I'm going to bolt the turbo and downpipe back up and let her rip. I also had the downpipe welded up where I made some cuts to get the cutouts off -- that way it will eliminate the 02 problem as well.
. And you are scheduled for a ride at Thunder if you make it down (although the car will be in street trim at that point).
Brandon
I got the manifold back from my local shop today and it was cracked in a few places (one at the flange for the turbo) so I'm almost positive this is going to fix the problem. I got the manifold on the car tonight and threw a new set of plugs in it and then tomorrow after work I'm going to bolt the turbo and downpipe back up and let her rip. I also had the downpipe welded up where I made some cuts to get the cutouts off -- that way it will eliminate the 02 problem as well.
. And you are scheduled for a ride at Thunder if you make it down (although the car will be in street trim at that point).
Brandon
I could be off base with this but what if that side of the intercooler was plugged with shipping material or something along those lines...the turbo would have a hella time if there was some restriction....But then i suppose you would just blow a hose unless it was only partially restrictive....and Im sure there would be funny A/F readings on that side...oh well, just trying to think outside the box....good luck....
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iTrader: (37)
Joined: Nov 2002
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From: East Side Performance! mASShole
Brandon, glad your not mad. A ride will make me want it back!!!!!!!!
Jam, i like that idea!!! I had it wraped very well with buble wrap, but who knows. also it could be the hose running to the IC, that gets pretty sqashed down
Jam, i like that idea!!! I had it wraped very well with buble wrap, but who knows. also it could be the hose running to the IC, that gets pretty sqashed down