1990 Trans am GTA tpi. When cold, the car starts up just fine but when I put it in reverse or drive it'll want to die, unless I'm holding the gas... If it does die, it takes 10 seconds for it to start back up. Will also hesitate when pressing gas.

When warm, the car runs fine with the occasional hesitation. Gas mileage is terrible though (16mpg on highway). No CEL. What should I start looking at? I'm new to these cars. Thanks

 

Is your car stock or has it been modified in any way?

 

Possibly an EGR problem.

 

Only mod is a "CAI". & the EGR was removed and blocked off

 

Do your injectors look like this ?

 

I believe so, I'll check tonight when I'm back home

 

Looks like I have 3 different style injectors.. none of which look like the injector you posted about.




3 of them look like this



Only one like this



4 of them look like this

 

The multecs are problematic. For starter you might want to get a set from Southbayfuelinjectors.

 

Okay deal. Any idea why the previous owner would have 3 different injectors? And are these 22lbs or 19lbs injectors?

 

Most likely, 3 different repair efforts over the years.

Before getting too far into taking things apart, I'd check the coolant temperature sensor using a scan tool. I like to check them before the car is first started in the mornings...should read close to the actual air temperature.

 

305 uses 19#hr, 350 is 22#hr.
If you do dig in you might want to also replace your regulator diaphragm for good measure. Who knows it's age.

 

Where can I find an obd1 scantool that gives live data like that?

And I'm assuming I have the 22 an hour injectors? The guy I bought the car from *thinks* it's a 350. Never verified

 

You can find old otc pathfinders on eBay , or check the cts with a vom .