'91 PA Hard to start when warm

[clauritzen]

My PA has about 70,000 on an AC Delco replacement motor. It was stalling on me after idling, so I had it to the dealer to be checked out. From an earlier post I told them I thought it was the crank or cam sensor. They called later and said they were 90% sure it was the crank sensor. This was replaced and I have not yet had a stalling problem. However, the first start of the day is almost instant, but once the car is warm you have to crank it over for a long time to get it to start. The dealer looked at it, but couldn't find anything - they mentioned the possiblility of fuel rail problems but evidently didn't find any codes or anything. anybody have any good ideas?

[HotZ28]

Did the dealer check fuel pressure while the engine was warm? Fuel pressure problems will not set a code.

[auto trainy]

Try removing the vacuum line on the pressure regulator and see if there is fuel or the smell of fuel,if so the pressure regulator could be bad.

[clauritzen]

Yeah, the dealer checked the fuel pressure and said that it was good. Fuel pump, strainer and filter were just replaced a few months ago.

[HotZ28]

Have you checked the coils? Do you have the Delco or Magnavox ICM? Delco has the 3-coils mounted on top and all the ignition wires connect on the same side. Magnavox has the coils built in, and has the ignition wires coming out of each side.

[wrightz28]

His s/b the Delco/remy 3 piece pack and located over the alternator which get a little grumpy when the alternator dissepates ti's heat.