Several problems after header install.
Registered User
Joined: Mar 2002
Posts: 639
From: Grand Prarie,T.X
Re: Several problems after header install.
Originally Posted by jsetzer
We did the race style hooker lt's. Bloked the egr. Programed out the egr.
Now my abs light is on, abs works, 3rd brake light wokrs.
SES is on. Code 16, 23, 43. Once car goes into closed loop the o2's stay .900mv + It acts like a short somewhere because sometimes the light goes off and the air/fuel acts like its in closed loop again.
Code 16: Opti - I know its not this, car runs too well.
Code 23: MAT - I had a second IAT, swapped and no help.
Code 43: Knock sensor circuit. The wire looks good on the sensor but other than that I suppose they can go bad... Logging reads about the normal level of knock retard though.
Car runs and pulls fine. No misses except at idle it will bog down sometimes because its so rich. Does not happen in open loop, seems to be worse when fans are on. It does this off and on going down the highway. 30secs good, 30 secs bad. It is not really a specific amount of time just bounces back and forth.
Anyone seen anything similar? I am just trying to figure out where to start.
Now my abs light is on, abs works, 3rd brake light wokrs.
SES is on. Code 16, 23, 43. Once car goes into closed loop the o2's stay .900mv + It acts like a short somewhere because sometimes the light goes off and the air/fuel acts like its in closed loop again.
Code 16: Opti - I know its not this, car runs too well.
Code 23: MAT - I had a second IAT, swapped and no help.
Code 43: Knock sensor circuit. The wire looks good on the sensor but other than that I suppose they can go bad... Logging reads about the normal level of knock retard though.
Car runs and pulls fine. No misses except at idle it will bog down sometimes because its so rich. Does not happen in open loop, seems to be worse when fans are on. It does this off and on going down the highway. 30secs good, 30 secs bad. It is not really a specific amount of time just bounces back and forth.
Anyone seen anything similar? I am just trying to figure out where to start.
Thread Starter
Registered User
Joined: Feb 2004
Posts: 2,182
From: Moore OK
Re: Several problems after header install.
Originally Posted by Zeueses 97 RamAir
well the abs light is on because okay listen passenger side follow it down to the side of firewall of header its to close to the wires right by your passenger tire if you jack the car up its the wire right by your tire going up to the computer you will see it.... get some boots for heat and tie wrap it if you have any problems let me know ,but im sure thats your prob mine did the same thing
Nope, the wires are fine and pulled pretty far away from the headers.
And I don't have the knock sensor in yet because the center of it stripped and just spins. Waiting for a ride to go get some channel locks or something.
Thread Starter
Registered User
Joined: Feb 2004
Posts: 2,182
From: Moore OK
Re: Several problems after header install.
Got the damn thing in finally and it fixed my porblem.
I would do the tests as prescribed. IF all tests pass then I would replace the knock sensor. Mine would do fine sometimes, sometimes not. Maybe it was all the buildup on it.
It is a drain plug. Either be really quick or drain the whole thing. I drained it.
Thanks for all the suggestions guys. I am off to break something else.
ABS light still on... but it works, so for now I am not going to mess with it.
I would do the tests as prescribed. IF all tests pass then I would replace the knock sensor. Mine would do fine sometimes, sometimes not. Maybe it was all the buildup on it.
It is a drain plug. Either be really quick or drain the whole thing. I drained it.
Thanks for all the suggestions guys. I am off to break something else.
ABS light still on... but it works, so for now I am not going to mess with it.
Registered User
Joined: Sep 2004
Posts: 1,872
From: Lantana, TX
Re: Several problems after header install.
I decided to change mine while I was under the car doing O2 sensors and it fixed my problem as well. I was driving home and the light came up again, but it was for EGR (P0400). I'm not worried about that so much since I can get that tuned out if need be.
Anthony
Anthony
Registered User
Joined: Mar 2005
Posts: 47
Re: Several problems after header install.
jsetzer...
Read through your posts. What caught my attention is what you said about the SES comes on and the cooling fans kick on.
Advice: Pop your underhood fuse cover, and check your airpump fuse. I bet it is blown.
I had the SAME thing happen on my 95 Z28; it even made the computer register some false codes. I checkout my car out; guess what??
The A.I.R. pump was full of water; causing the fuse to pop. That, in turn causes SES to come on, and the cooling fans also came on. And the false codes I mentioned earlier.
Got my airpump at my local GM dealer for $160 out the door. Parts stores didn't even list the air pump in their books.
Read through your posts. What caught my attention is what you said about the SES comes on and the cooling fans kick on.
Advice: Pop your underhood fuse cover, and check your airpump fuse. I bet it is blown.
I had the SAME thing happen on my 95 Z28; it even made the computer register some false codes. I checkout my car out; guess what??
The A.I.R. pump was full of water; causing the fuse to pop. That, in turn causes SES to come on, and the cooling fans also came on. And the false codes I mentioned earlier.
Got my airpump at my local GM dealer for $160 out the door. Parts stores didn't even list the air pump in their books.
Thread
Thread Starter
Forum
Replies
Last Post
94Z28LS1toLT1
General 1967-2002 F-Body Tech
8
Apr 7, 2015 05:37 AM