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I recently bought a 95 trans am that was modded by the previous owner and left aside when he bought a new camaro. Car ran fine for the first few days but then It started dying on me and wouldn't start up. Took about a minute or two to start. The car will do fine if I up shift myself and only if I slowly accelerate up to 5-6k but it will sputter and drop the Rpms or not respond at all at wot. Also I get a strong odor of gas. A mechanic in town told me that it could be the fuel pump or the opti because the car had been sitting for a while. In drive the car will not go at wot. This is my second trans am and I know what they can do but thiamine feels sluggish and weak. Thanks for your help.
Last edited by red_diablo; Feb 17, 2015 at 08:29 PM.
Check the fuel pressure regulator. To check it, all you have to do is pull the vacuum line on the passenger side of the intake, if you see any drip of fuel, or smell fuel in the vacuum line [actually smell the end of the line] the regulator is bad.
Checking the fuel pressure is a good first step. Needs to be checked at key on/no run, on at idle, and also WOT.
Is the car setting the check engine light(SES light)? Is it blinking on then off at any time? You need to get the car scanned for codes even if the SES light is off.
It would also be interesting to know what the long term fuel trims are reading.
Will it rev okay sitting still or will it not rev under load? Any popping or backfiring when revving?
Did the former owner tell you of any known issues with the car?
The car revs up fine when it's in park it in neutral. It doesn't pop nor backfire. Only when it's in drive.
Check engine light does not come on at all. The only light that is on is the low coolant light. Owner said it was the sensor.
The engine was redone in 09 and tuned in 2013 if I'm not mistaken. The owner said he left it sitting for a while because he had a gto and a new camaro. He also mentioned that the fuel pump was giving out when they were tuning it.
I'm getting the codes checked after my shift and I'll post up the results. I'll also post up the dyno sheet so that you guys can see the range and drop of power.
I'm going to say opti. It sat, probably got moisture in it.
X2. Don't buy a new one though. Just remove, disassemble, clean, reassemble and seal/loctite, and reinstall. Should only cost water pump gaskets, loctite/sealant and coolant. So~$20.
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New to the lt1.. I need help. 
