Here is a list of symptoms

*Hard to start, turns over several times before starting.
*After aprox. 30m driving: doesn't want to take the gas like vapor locking.
*fuel and tank hot
*idling surges, sometimes cutting off.
*opening fuel cap warm air rushes out(more then should) and tank popping like it had expanded.

whats been done...
*Replaced fuel pump 3 times
*replaced mass airflow
*check engine light NOT on

*has an adjustable fuel regulator
*does not have smog pump hooked up.
*exhaust and muffler NOT to close to tank.

thanks for any help

 

injectors. i didnt wanna believe it when it happened to me till i ohmed them out for myself. just cuts out when hot? wont rev over 1300 rpm?

 

Hard start - check fuel pump relay - does the fuel pump prime?

If relay goes bad, pump won't prime, thus takes a bit to start since the backup oil pressure sending circuit has to see oil pressure before it starts to run the pump.

 

How might this cause the fuel tank to seem over pressurized? hot? thanks

 

Checked, yes the fuel pump primes everytime.

 

Purge canister clogged, fuel tank pressure control valve faulty, or pinched vent line.

 

Hey ASE doc, could those issues also cause the driveablility problems I described? and thanks for the help

 

I'll put 20 on that being the issue

there's a process for diagnosing that on the 4th gens, there must be something similar on the 3rds.......I'd hope

 

One quick way to verify if the tank pressure is causing your drivibility issues is to remove the fuel cap and drive it. If it's all better, then you know. I would not discount the injectors though, they are a huge failure item on these cars. As far as diagnosing the canister and tank control valve, I'll see what I can find and post it for you.