How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dan Your Own Question
Dan
Dan, Technician
Category: Buick
Satisfied Customers: 23966
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
17871496
Type Your Buick Question Here...
Dan is online now
A new question is answered every 9 seconds

Buick Regal: 94 Buick Regal Custom, Car won't start. Battery

Customer Question

94 Buick Regal Custom, Car won't start. Battery and connections are good. Engine turns over no problem. Will run on Starting fluid. All Fuses are good. New Fuel Pump relay. Pressure tested fuel pump at just under 50psi when jumped. Any ideas?
Submitted: 2 years ago.
Category: Buick
Expert:  Dan replied 2 years ago.
Hello, my name is ***** ***** I'm here to help get your problem solved. This vehicle has common problems with the PCM failing causing no injector pulse. If you have good spark and fuel pressure then I suspect your missing injector pulse and the only thing that would stop injector pulse is a shorted injector, shorted injector wiring, or failed PCM. Injector resistance should be 11.6-12.4 ohms. If all are within range verify wiring is not shorted to ground then replace the PCM. Let me know how it goes or if you have more questions, thanks.
Customer: replied 2 years ago.

I have spark, during crank. I'll check the injector resistance. Is there any way to check the PCM before replacement?

Expert:  Dan replied 2 years ago.
The closest thing you can do to checking PCM is verifying it is not sending ground pulse to injectors. Let me know how it goes or if you have more questions, thanks.