ok , i installed edelbrock headers, Now my car backfires through the tbi, wtf caused this, how do i fix it ANY suggestions or ideas???????????

 

Check to make sure that during the install process you didnt jar something lose, knock a spark plug wire off, pull a vacuum hose off etc. Go from there.

 

First thing I'd check would be firing order. I heard plenty of stories about people who accidentaly switched a couple wires while hooking everything back up. - just check to be sure -

 

yeah recheck everything that you had to unhook...


you dont want any backfiring!

 

would me messing up the firing order make it backfire?? i HOPE thats all thats wrong, also, ...could a fouled spark plug do it????????

 

messing up the firing order could definately cause a backfire, as you could be sparking while an inlet valve is open, causing a flame front in the plenum, this would be heard as a loud pop.

Another clue of this would be MEGA rough running, as you would only be firing on six.

I'm basing this on my experience of european cars, but i don't see any reason the TPI would work any differently to any other car.

Feel free to correct me if i'm wrong, guys!

 

well uess what...yall were right! redid the plugs, ....stil didnt work, redid em again, worked perfectly !!! thanks for all your help. header install complete!! also had to replace the damn battery after it was done, guess my car wanted more work done:hail: :rockon: :rockon:

 

Glad you got it sorted dude!

 

Im glad that you got all your problems worked out. Im sure it runs a lot better now. With your tbi set up and with carbs, you got to be careful when your car backfires. Generally nothing will be wrong with tbi or carbs, but you always run the risk of ruining it. If your car seems to take a crap in a few weeks, you might want to look at your tbi again.

 

lol dont say that, i cant handle any more problems, ...especially not twith the tbi unit itself

 

Lemme guess... was it #5 and #7?

 

lol it WAS #5 and #7, the wires for the 5 and 7 were weird, the wire for 7 was LONGER than 5 so i essentialy assumed, longer, goes to front, shorter, goes to back. go figure, i wa swrong and gm is retarded lol