I had car running in my garage for about 10 minutes after edelbrock tes header kit also installed accel cap & rotor/wires also ac delco rapid fire plugs ran smoothly the whole time until i jumped on it during the test drive car popped and backfired and stalled and would not stay running what the f##k HELP PLEASE

 

Welcome Aboard!

Any error codes stored in the ECM? One good (or bad) backfire and you can toast the hot wire sensing element in the MAF. The screens help deflect some of that, if they are still installed, but don't always stop damage from a truly bad backfire.

Try to retrieve any error codes and report back. We'll be here.

 

Hopefully you still have the screens in the MAF. Pull codes, also try starting the car with the MAF unplugged. Check the usual things such as connections, grounds, cap, rotor, wires etc.

 

Definitely check the accel cap and rotor. I had a similar problem using it on my 92 RS years ago. I am assuming also that you re timed the car once all the new goodies were installed.

 

Any error codes stored in the ECM? One good (or bad) backfire and you can toast the hot wire sensing element in the MAF. The screens help deflect some of that, if they are still installed, but don't always stop damage from a truly bad backfire.

Try to retrieve any error codes and report back. We'll be here. [/B][/QUOTE]

car keeps throwing code 12 I think that is no r pulse to ecm does that mean my cpu is bad ?

 

car keeps throwing code 12 I think that is no r pulse to ecm does that mean my cpu is bad ? [/B][/QUOTE]

also the car backfires out the exhaust not the tpi

 

Code 12 = normal; there's no distributor pulses when the engine isn't turning.

Take off the cap and look at the rotor.

 

also the car backfires out the exhaust not the tpi [/B][/QUOTE]

thanks John

 

I put a new ac delco cap and rotor on this morning took the accel back still the same thing car runs really rough then stalls while it is running the service engine light goes on and off also car does not run more then 10 seconds I double checked the firing order and made sure all the plug wires were in the right places still the same thing, i also added a new ignition module and coil and still the same thing any other ideas guys thanks

 

I figured out the probelm it is just the ground on the head broke some how thanks for your help