Poor performance after header install
Thread Starter
Teching In
Joined: May 2009
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Poor performance after header install Just installed long tube headers on my 93 z28. Now the car has a bit of a rough, luggy idle and acceleration. I blocked off the egr tubes, do I just need to get the egr tuned out now? I am also pulling code #13, which I believe is an o2 sensor issue.
The poor performance is most likely due to your o2 sensor(s).
Code 13 - Bank 1 (left) Oxygen Sensor (O2S) Circuit (open circuit).
I would check the wiring to that sensor. You might need a new sensor as well.
Also check your wires to see that you have all the wires onthe correct plug and none are burning up against the headers.
Code 13 - Bank 1 (left) Oxygen Sensor (O2S) Circuit (open circuit).
I would check the wiring to that sensor. You might need a new sensor as well.
Also check your wires to see that you have all the wires onthe correct plug and none are burning up against the headers.
TECH Enthusiast
Joined: Feb 2003
Posts: 675
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From: Longview, TX
an o2 sensor will actually read lean from a dead cylinder, they do not measure fuel, just o2.
But i agree, check plug wires for damage and (i have done it) being on the wrong plug. Also did you get o2 extensions or did you make your own?
But i agree, check plug wires for damage and (i have done it) being on the wrong plug. Also did you get o2 extensions or did you make your own?
ALSO, did you have coated headers? You can ruin O2's from the initial heat cycle while the coating heats up for the first time. Always use old O2's for the first heat cycle.
EGR will not affect performance.
EGR will not affect performance.
Thread Starter
Teching In
Joined: May 2009
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Made my own wiring extensions from the old sensors. The headers are not coated.
I'll take a look and see if I can find any connection problem.
Edit: Although I don't think I made an extension for the left sensor.
I'll take a look and see if I can find any connection problem.
Edit: Although I don't think I made an extension for the left sensor.
Last edited by JakeDub; Jul 20, 2009 at 06:11 PM.
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If you didn't, the sensor wouldn't be plugged in. I'd get under there and check it out.
Thread Starter
Teching In
Joined: May 2009
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My car is kind of popping, almost sounds like a slight backfire on a cold start...is this another symptom of a bad o2?
And where I can find some single wire extensions for a 93z?
