Stalling while driving
My car is a 94 Bonneville SE 3800 NA 136,700 miles
I've been experiencing more and more frequent stalling, After cleaning battery connections(all parts of them) ground connection for battery at the frame, the ground connection for the PCM, Buss connections in rocker panels, replaced crank sensor, It will die on me while on the freeway or around town driving at different times of the day, just as if you turned the key off. No sputtering, just suddenly dies. The warning chime will go off, check gauges lamp will come on, some times time the brake warning light will come on, gauges still up and working until I pull over and try to restart it.
It will crank well but not fire up for all most five minutes. It will on rare occasions, start right up but then die in a few seconds, taking several minutes to restart. Then it will start and run for a couple of days at times but has almost become a daily occurrence sometimes twice a day.
Glitchy things with my automatic locks and power windows not working when staring the car.
Normally the door locks engage when the key begins to start the car and then unlock automatically when the key is turned off. There are some times the the locks don't engage automatically at all and the power windows don't operate, on other days it all woks normally. Is this something in the PCM?
A local mechanic shop had the car on a scanner, no codes to speak of. They had it quit while they were driving on the freeway, their test equipment was connected while test driving and it showed zero fuel pressure at the moment of stalling. Diagnosis was bad fuel relay or bad fuel pump. Because of the expense of the shop time and testing to that point ($228.00) all I could afford was the fuel relay replacement. Shop rates for doing the pump replacement at the same time would run to $700 plus, too close to Christmas to bite that bullet. New fuel relay alone didn't cure the problem, still dieing, which leaves the fuel pump as the main culprit.
The shop said they would not know which type of pump my car had until it the old was removed and then could check the tag. Quoted price for the pump alone was (roughly) $225 to $250. I think I could do better from some place like RockAuto.
PCMs seem to be a regular failing point for the 94-95 Bonnies. Could the PCM cause the symptoms of dieing since some other related (very minor) ignition operations are acting up.
If not that leaves the fuel pump.
I have a friend who could help me change it out on a Saturday but I need the new one on hand so as not to tie up several days of removal and ordering. Is there any way to identify what type of pump my Bonnie has with out removing it first? RPO'*? Or??
What additional components should I replace while the fuel tank is removed? Sealing ring, Strainer sock?? Other?
Where could I get replacement holding straps if the old ones are not reusable?
Thank you for taking the time to read such a long post. I would appreciate any and all help and advice your might have to offer. Anything I might have left out please feel free to ask.