Just installed headers and corsa indys,drove it for 2minutes came to light and car started back fireing,took off from light drove fine,came to another light,down shifting and poping like crazy.So i got on the car,1st,2nd gear floored it and car starts hesitating and shakeing,what the f***K.So i called up xtreme motor sports,they say never heard of that hapening!Told me to check plugs and wires,so i did ,they were fine.A friend told me he had same problem,so he disconected battery for 10 minutes hooked it back up,every thing worked fine.I got home disconected battery, waited 10 minutes hooked it back up,what da you know it worked!!!!!Car runs great and sounds awsome!!!!Every one i talked to said you dont need to discnnect battrey (THEY WERE WRONG)said computer will adjust.Someone explain why disconnecting battery worked! Thanks!!!!!!!!

 

ttt

 

My experience says that disconnecting the battery and then running the Idle Relearn Proceedure is the best way to get the engine running correctly quicker and easier.

:cheers:

 

I needed to do this when I first installed my Blackwing, I already had my Magnaflows. :yesnod:

 

Hey TMan, great info buddy. Thanks for letting us know. I will definitely will have to rememer this one.

Mav

 

What codes did you get?

Post those and it's easier to tell exactly what happened.

 

How do you run the idle relearn? I would like to do this cuz I just put on LT Headers.

 

Which headers did you install? Are they ceramic coated? The O2 sensors are usually located farther down stream away from the cylinder heads on headers vs. factory manifolds. This subjects the O2 sensors to a lower temperature. The lower temperatures cause the sensors to produce a slightly different voltage for the same A/F ratio. The PCM will freak out for a while with out resetting it. The popping will be reduced and if you install an X-pipe the popping will almost be eliminated.

 

From the 2001 Service Manual:

Idle Learn Procedure

The learned idle procedure needs to be done if any of the following events occur:

- The powertrain control module (PCM) is disconnected
- The battery is disconnected
- The PCM loses power
- The PCM is reprogrammed

The engine idle is unstable when the learned idle position is lost.

Automatic Transmission
Perform the following procedure in order to return the learned idle to the correct position:

- Turn OFF the ignition.
- Restore the PCM battery feed.
- Turn OFF the A/C controls.
- Set the parking brake, and block the drive wheels.
- Start the engine.
- Ensure that the engine coolant temperature is more than 80°C (176°F).
- Shift the transmission into Drive.
- Allow the engine to idle for 5 minutes.
- Shift the transmission into Park.
- Allow the engine to idle for 5 minutes.
- Turn OFF the engine for 30 seconds.

Manual Transmission
Perform the following procedure in order to return the learned idle to the correct position:

- Turn OFF the ignition.
- Restore the PCM battery feed.
- Turn OFF the A/C controls.
- Set the parking brake, and block the drive wheels.
- Place the transmission in Neutral.
- Start the engine.
- Ensure that the engine coolant temperature is more than 80°C (176°F).
- Allow the engine to idle for 5 minutes.
- Turn OFF the engine for 30 seconds.

 

Right now there's a lot of speculation and guessing. If the car ran that rough, then it would have set a code or two, which, if posted, would allow someone to make an intelligent diagnosis.