Im new to the TPI I have an LT1 camaro so i need alil help. My uncle has a 86 GTA with a built 355 tpi with all bolt on but with out a CAI. the problem his haven is at low RPMs in drive youll give it some gas and it will try and die. And also in park at idle. But when you rev it up in park you hear a popping noise at the front of the motor?? like it has a miss. Just need some help tracking the problem down.

 

I am having a similar problem with my new crate motor. Its TPI also but it stalls completely at idle and pops when you rev it. We are looking at the issue but it is slow going. Hopefully you'll get some input but there are so many possibilities.

I'd start with unplugging the MAF and see if the car runs better that way.

EDIT: I dont mean keep it that way BTW. I mean replace it if thats it

 

Well cleaned it with MAF cleaner and cleaned the TB still samething i did see that the screen was bent up a lil and it was a boush MAF. and none of the plug wires are melted it funny if you think bout it.

 

could had bad lifter,push rod or rocker arm--could also have rounded lobe on cam if they are new rebuilds i would stay away from cam lean toward others if it is same popping i'm thinking of

 

I see so i guessing the way to find out is the tare it apart and look. So could it be a tuning problem ??

 

Don't tear it apart yet. Check the TPS. It could be faulty. Also, with a better flowing setup, the "Acceleration Enrichment" i.e. AE could need some re-calibration.
Only other things that are common for this would be a seriously retarded ignition timing.
But, the pops from the front of the engine are almost always LEAN pops or retarded timing, and possibly overtightened valves, but that would idle like crap.

 

Im dumb dont rip in to me but whats TPS stand for lol. He has an accel ignition. Cool to see someone get out of Iowa. lol also the car does it when its warmed up if that helps any.

 

Hehe, are you in Iowa now? I'm coming back in less than 2 weeks, for a 2 week vacation. I'll be in DesMoines on around the 1st and 2nd, then go up to north central iowa (northwood/kensett near mason city and clear lake). I'll be working on cars and stuff (including a TPI, and another aftermarket EFI system in a truck), if you want any help.

TPS is throttle position sensor.

 

We got rid of that boush MAF works fine after the tune up the car was running way too lean. Thanks for all the help guys.

I'm one who stayed Im in northeast Iowa 25 miles from waterloo, cedar falls. Its been in the 90s here.