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

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94 Buick Regal Custom, Car...
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
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Answered in 20 minutes by:
6/6/2015
Buick Mechanic: Dan, Technician replied 2 years ago
Dan
Dan, Technician
Category: Buick
Satisfied Customers: 24,744
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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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.
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Customer reply 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?

Buick Mechanic: Dan, Technician 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.
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Dan
Dan
Dan, Technician
Category: Buick
Satisfied Customers: 24,744
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