Random Misfires on Cammed Trans Am
Thread Starter
TECH Apprentice
Joined: Aug 2008
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From: Greensboro NC or Miami Fl
Well i would of thought so too but car runs fine out of nowhere it would start acting up a gm mechanic stated that what you hear is regular for an ls1 especially with 180k miles well now its 190k. I miss my cj i shouldnt of done the trade with the guy im just so pissed off as if it ever does blow up i wont have a way to get to work
I'd have the O2 wiring checked from the pcm to where the O2 cables plug together, and also check the grounds on the back of the heads.
BTW, in the video is that exhaust smoke I see on the passenger side?
I'd also remove the passenger side valve cover and check for a loose rocker mount bolt/s and rockers that are loose from the factor bearings giving out.
I know having difficult to find issues takes all the joy out of owning a F-body, it can be really frustrating!
Good luck, an I hope you solve the problem soon so you can start enjoying it!
BTW, in the video is that exhaust smoke I see on the passenger side?
I'd also remove the passenger side valve cover and check for a loose rocker mount bolt/s and rockers that are loose from the factor bearings giving out.
I know having difficult to find issues takes all the joy out of owning a F-body, it can be really frustrating!
Good luck, an I hope you solve the problem soon so you can start enjoying it!
Last edited by 99Bluz28; Mar 18, 2013 at 03:25 PM.
Thread Starter
TECH Apprentice
Joined: Aug 2008
Posts: 369
Likes: 0
From: Greensboro NC or Miami Fl
I'd have the O2 wiring checked from the pcm to where the O2 cables plug together, and also check the grounds on the back of the heads.
BTW, in the video is that exhaust smoke I see on the passenger side?
I'd also remove the passenger side valve cover and check for a loose rocker mount bolt/s and rockers that are loose from the factor bearings giving out.
I know having difficult to find issues takes all the joy out of owning a F-body, it can be really frustrating!
Good luck, an I hope you solve the problem soon so you can start enjoying it!
BTW, in the video is that exhaust smoke I see on the passenger side?
I'd also remove the passenger side valve cover and check for a loose rocker mount bolt/s and rockers that are loose from the factor bearings giving out.
I know having difficult to find issues takes all the joy out of owning a F-body, it can be really frustrating!
Good luck, an I hope you solve the problem soon so you can start enjoying it!
The rocker trunions (bearings) aren't hard to change, that's most likely all you'd need to do with them.
With the 97-2003 corvette rears O2s you'll want either BOSCH Part # 13111($48), ACDELCO Part # 213810($61), DENSO Part # 2344617($41), NTK Part # 21537($47), or DELPHI Part # ES20003($49). All prices are each.
The ACdelco and Bosch sensor covers look the same, and the Denso and NTK sensor covers look the same.
With the 97-2003 corvette rears O2s you'll want either BOSCH Part # 13111($48), ACDELCO Part # 213810($61), DENSO Part # 2344617($41), NTK Part # 21537($47), or DELPHI Part # ES20003($49). All prices are each.
The ACdelco and Bosch sensor covers look the same, and the Denso and NTK sensor covers look the same.
Last edited by 99Bluz28; Mar 24, 2013 at 02:31 AM.
Thread Starter
TECH Apprentice
Joined: Aug 2008
Posts: 369
Likes: 0
From: Greensboro NC or Miami Fl
The rocker trunions (bearings) aren't hard to change, that's most likely all you'd need to do with them.
With the 97-2003 corvette rears O2s you'll want either BOSCH Part # 13111($48), ACDELCO Part # 213810($61), DENSO Part # 2344617($41), NTK Part # 215379$47), or DELPHI Part # ES20003($49). All prices are each.
The ACdelco and Bosch sensor covers look the same, and the Denso and NTK sensor covers look the same.
With the 97-2003 corvette rears O2s you'll want either BOSCH Part # 13111($48), ACDELCO Part # 213810($61), DENSO Part # 2344617($41), NTK Part # 215379$47), or DELPHI Part # ES20003($49). All prices are each.
The ACdelco and Bosch sensor covers look the same, and the Denso and NTK sensor covers look the same.
You should have no problem finding a friend or shop to press out the old then press in the new.
Hell, ship the upgraded trunions and your (serviceable) rockers to me, and for $20 + the cost to ship them back to you, I'll remove/install them with my small arbor press.
http://texas-speed.com/p-1088-texas-...m-package.aspx
http://texas-speed.com/p-361-cohemp-...s-engines.aspx
Thread Starter
TECH Apprentice
Joined: Aug 2008
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From: Greensboro NC or Miami Fl
Ron the car ran like **** today i could barely keep up with highway traffic and the ses light was flashing for a few minutes no strange noises or knocking sounds
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Brett Foote When its cold and when the light goes solid it is in open loop. This sounds like o2's to me. Car will run good cold till it gets to 140degrees then will go to closed loop and run like crap when trying to use the o2's to run. Then the computer will see that it is not working and kick it out of closed loop again. I would start there also look for any exhaust leak befor the o2's that could be giving the o2's a false reading. If that is not it then I would have a tuner look at the tune and see why in closed loop it is running poor
FYI, even if you change the O2 sensors you might still have the same issue, that's why I'd recommend verifying that the O2 wiring from the PCM down to the plugs where the O2s plug in are good. If you have to take it to a shop that specializes in electrical diagnostics I'd do it. 
Thread Starter
TECH Apprentice
Joined: Aug 2008
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From: Greensboro NC or Miami Fl
Well guys i sswapped out the passenger side o2 sensor with tje ntk looks like it had a bosch sensor once i took off the bosch it was covered in black soot. The car is now running fine but i havent drove it long enough to see if it has fixed the problem. The ses light did turn off once i switched it out and drove around for a bit. I will keep everyone updated but hopefully this fixes it there is still some whote smoke coming out on idle smells like gas
Thread Starter
TECH Apprentice
Joined: Aug 2008
Posts: 369
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From: Greensboro NC or Miami Fl
Just an update for the folks replace the o2 sensor on the passenger it has not acted up since then at all. A code popped up though only for the passenger side stating slow response from bank2 sensor 1 which is the one i replaced. I replaced it with a ntk corvette sensor any ideas on fixing it kind of strange its only on the passengetlr side.
