Just put a new engine (305) in my 1988 GTA. However, I'm experiencing what I consider a small problem. Upon start she runs fine, but when I put it in gear and pull off she begins to sputter as I accellerate. After about 5 minutes of driving the it clears up and runs fine. This happens even if I let the car get to its operating temp. before driving off as well. It seems to me that the car maybe tempermental or maybe the injectors are not operating correctly. I used seafoam and it cleared up a little bit, but it's still smuttering a little, but less than before. I have new wires, plugs, new fuel pressure regulater, new fuel pump. thanks in advance for your help.

Oh, by the way has anyone experienced a humming sound coming from the fuel pump when our cars get hot? My mechanic thinks my exhaust sysem is too close to the gas tank. I never had this problem before with other catbacks. I currently have the 3" flowmaster catback system.

Jeff

 

Not sure about your sputtering, probably not getting enough cold-start-enrichment. How old is your fuel pump?

 

Attilla, the fuel pump is less than 2 months old...

 

If I'm not mistaken, the '88 should have a 9th injector, for cold-start enrichment. That's the next thing I'd investigate.

 

Thanks Attilla. I'll look into the 9th injector cold start enrichment. Hopefully, that's a simple fix...

 

while running pull the injector plugs off the injectors one at a time.

if there is no change in the way the engine runs then you pull that plug and check for spark

if you dont have a tpi motor under the hood then chances are it is not a gta and you should fill out your profile so we can help with your diagnoses

 

Jamon,

It's definitely a TPI motor, as it has the same block casting numbers (14093627) of the old 5.0 that I pulled out of the car.

 

That same block casting was used for carb, TBI, and TPI engines.

 

pull the injecter plugs one at a time while it is running and there should be a noticalble change in the running of the tpi

if there is not then pull the spark plug out and check the spark plug wire

 

Will do. Thanks a lot Jamon8