Need help...................

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Old May 29, 2008 | 06:17 PM
  #1  
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Default Need help...................

My car is being a little bitch. I put headers on it, and ever since the install it stumbles, and backfires upon acceleration, and there is a slight miss at idle.. I figured the computer just needed to relearn everything, but it never did. I swung by autozone to get the codes read, and the only thing throwing a code are the rear O2's, and the EGR which are gone. all this was with open headers, so I figured once I get some piping behind the O2 sensors it will be fine... WRONG

I went by the exhaust shop, and got TD's put on. Still doing the same ****. I checked all my plug wires, and they are all fine

What I want to know is what are the things that can be causing this?
The only things I have come up with are
1. bad plugs
2. low fuel pressure

I just want to come up with a list of things that I can trouble shoot tomorrow if these 2 things arent the problem. I am so damn frustrated right now I dont even want to look at it tonight..

Anyone that wants to help me after 5 tomorrow is welcome..
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Old May 29, 2008 | 06:31 PM
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Possibly a cracked plug. I'm guessing you removed the coil packs during the install? Maybe you didn't connect the wires back in their original location?
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Old May 29, 2008 | 06:33 PM
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The wires are all in their correct location. Thanks for the input.
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Old May 29, 2008 | 06:34 PM
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have someone go into your tune and put the rear 02s and the egr on standby . no more codes then.
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Old May 29, 2008 | 06:40 PM
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Originally Posted by ex-SS-ve
have someone go into your tune and put the rear 02s and the egr on standby . no more codes then.
I plan on getting someone to tune them out in the near future, but it doesnt effect how the car runs so I am not too worried about it.
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Old May 29, 2008 | 06:52 PM
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Originally Posted by Juicy J
I plan on getting someone to tune them out in the near future, but it doesnt effect how the car runs so I am not too worried about it.
Bad O2 Sensors can make your car run like ****. Mine did. I was going to say what the guy earlier said, and have them tuned out. Good luck.
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Old May 29, 2008 | 06:53 PM
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I had one O2 go bad and my car ran like shet.
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Old May 29, 2008 | 07:10 PM
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burnt spark plug wire.
bad o2's.
cracked plug (**** happened to me, it was a hair line crack).

in that order.
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Old May 29, 2008 | 07:56 PM
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Try swapping sides on the front O2 sensors (right to left and visa-versa). Just had this problem myself.

99 FRC
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Old May 29, 2008 | 08:05 PM
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I had the same issue... pulled the plugs twice to look them over, and they looked perfect under a close examination with flourescent light. Decided to replace the plugs anyways, and it started running like a champ.
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Old May 29, 2008 | 08:54 PM
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Same thing happend to me it's the plugs!!!!
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Old May 29, 2008 | 10:14 PM
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it sounds like bad 02's
or damaged plugs, check gaps
in the dark with no light, check to see if any sparks around the wires boots
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Old May 29, 2008 | 10:17 PM
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o2's are probably your problem since you drove awhile with open headers
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Old May 29, 2008 | 11:22 PM
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Check to see if you have a wire up against the header or pinched between the header flange and head.

I seem to recall an issue with the wire loom on the passenger side being really easy to get against the header tubes.
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Old May 29, 2008 | 11:33 PM
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I ruled out the O2 sensors by switching them out. Probably should have mentioned that.

Checked my fuel pressure and that was fine, thanks to blake culp.

Also checked plug wires to make sure they were all firing and they were.

So I guess its the plugs.

I cant wait to see how the car runs with the new exhaust. I get frustrated so easily when I work on cars. I just didnt feel like doing the plugs if I didnt have to.

Thanks guys
Jeremy
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Old May 30, 2008 | 09:48 AM
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Originally Posted by 99FRC
Try swapping sides on the front O2 sensors (right to left and visa-versa). Just had this problem myself.

99 FRC
Vettes are O2 side specific not F-bodies.
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