weird engine problems
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Junior Member
Joined: Sep 2008
Posts: 6
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From: Gladwin MI
Car: 87 pontiac trans am
Engine: 305 TPI
Transmission: TH-700R4 (4L60) automatic transmiss
Axle/Gears: stock
weird engine problems
I am the proud owner of a 1987 Pontiac Trans Am with a completely stock (finished restoring it from a 12 year slumber) 305 TPI motor with a 700R4 tranny.
the problem that I am having is this; after I have been driving the car around for a while, enough for the engine to reach optimum operating temperature (in town), I will step on the gas but the car wont take off the way it is supposed to, it will rev and then (sometimes) downshift; when it does downshift it will rev high for longer than it should, it seems like it is almost stuck, then it downshifts, but still doesn't take off the way it should.the other problem is that (this happened to me a few times as well) I am driving the car normally, or when im stopped (in town) the car starts to chug, it almost seems as if its running rich, and then it quits, after a while it will start up and run fine.
I know for a fact that the car is running cool, the injectors are fine, and that everything is wired correctly. If i'm not clear on any of the questions, or if you have any questions, please let me know. If someone could either direct me to a thread that I missed, or answer my question from previous experience it would be greatly appreciated.
Last edited by Firefusion; Feb 16, 2009 at 01:15 AM.
Joined: Feb 2002
Posts: 3,462
Likes: 4
From: N. Illinois
Car: 92 GTA/ 00 TA
Engine: 383/350
Transmission: 700R4/T-56
Re: weird engine problems
Check the fluid level in your tranny. Sounds like it's either low or taking a dump.
Also ohm out your injectors. Injectors that are going bad run worse at operating temps.
Also ohm out your injectors. Injectors that are going bad run worse at operating temps.
Thread Starter
Junior Member
Joined: Sep 2008
Posts: 6
Likes: 0
From: Gladwin MI
Car: 87 pontiac trans am
Engine: 305 TPI
Transmission: TH-700R4 (4L60) automatic transmiss
Axle/Gears: stock
Re: weird engine problems
ok I will definitely try those out, ive got break coming up this next week so it looks like im going got have my hands full. is there anything particular that I should be looking for injector and transmission wise. and if my transmission is going what would you suggest I do. and if my injectors are shot should I just buy stock ones or replace them with aftermarket?
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