I bought a 92 Tbird with a 5.0 HO motor in it that was stored for past 8 years. After getting it running I noticed it had trouble accelerating without engine miss firing especially when it was cold. I tried driving it for a while with fresh gas and injector cleaner additive thinking that it would get better but it didn't. So I replaced the plugs,plug wires,cap and rotor,the coil and the coolant temperature sensor and it seems to be better when it's warm but still misses when it's cold. Does any one have any other ideas I would really appreciate it.

 

Fuel filter? Was it replaced? The engine will require more fuel when cold. There's also an Air Charge Temperature Sensor that adds to the Air/Fuel equation. Was it also changed?

 

I replaced the fuel filter first thing when I got it started. Then I changed it again Just the other day and it made no difference. I never heard of a air charge temp. sensor. Where is it? Thanks use common sense.

 

Not sure where it is located on your vehicle, but it should be screwed somewhere into the intake manifold. Either the upper or lower (will kind of look like the coolant sensor you replaced, but uses a thermistor for sensing the air temperature.

 

Thanks for the info USE COMMON SENSE. I tried changing the air charge temp sensor but so far it hasn't made any difference either. I'll try driving it for a couple days and see if it improves. Maybe it's a wiring issue or something else. Thanks again for the help.

 

No problem...

Another stab in the dard is this...

Have you checked the fuel pressure to see what pressure it's running at? Should be around 39PSI.