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 Post subject: Fuel pump prime
PostPosted: Tue Mar 26, 2019 9:38 am 
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Joined: Mon Jul 07, 2014 8:21 pm
Posts: 31
Location: Virginia
Year and Trim: 1995 Bonneville SE
From what I have read about concerning fuel pressure, this is new. Car died while driving. Coasted to a stop on the side of the road. would crank but acted like she wanted to start but no go. Had her towed home. Started to take steps. Was it getting fuel? Disconnected return line, turned the key, heard the pump prime, no gas coming out. Next disconnected the line in,turned the key on, no gas coming out after pump stopped. Tried to start with line disconnected. There was a short delay the gas came out of the line. Reconnected the line and she started. Very low and ruff idle. Test drive found the power was not there. At steady speed she would growl. I thought fuel should be coming out with just the key on priming the pump. My question, is should I work forward toward the injectors or to the rear towards the fuel pump? Thanks for help in direction of problem.


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 Post subject: Re: Fuel pump prime
PostPosted: Tue Mar 26, 2019 12:25 pm 
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Joined: Mon May 19, 2008 7:01 pm
Posts: 16810
Location: Central Illinois
Year and Trim: 1992 SSE
2009 G8 GT
I think there should at least be an initial spurt when keyed on. Not sure if it would continue or not.

There is a fuel pump test prime lead by the battery. Look for a green connector hanging above the battery and run a wire to it from the positive battery terminal to see if the pump will run. If it'll run that way, I'd look into the pump relay and filter first.

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 Post subject: Re: Fuel pump prime
PostPosted: Sat Mar 30, 2019 5:17 pm 
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Joined: Sun Aug 22, 2010 11:11 pm
Posts: 1668
Location: Ontario, Canada
Year and Trim: 2000 Bonniville SSEi L67
a clogged fuel filter will overwork the pump and starve the engine: start there. next, I would check the fuel pressure regulator and pump. then, if no joy, work forward

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poverty forces one to do unorthodox things

2000 SSEi
past rides:
1996 SSEi
1992 GTP
1987 Grand Am


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 Post subject: Re: Fuel pump prime
PostPosted: Wed May 08, 2019 6:42 am 
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Joined: Mon Jul 07, 2014 8:21 pm
Posts: 31
Location: Virginia
Year and Trim: 1995 Bonneville SE
Someone told me vapor lock would cause this. Don't know how that occurs. Never did this before. The ruff idle was the ignition control under the coils. Replaced. All is well. Thanks


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 Post subject: Re: Fuel pump prime
PostPosted: Wed May 08, 2019 3:57 pm 
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Posts like a Northstar
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Joined: Sun Aug 22, 2010 11:11 pm
Posts: 1668
Location: Ontario, Canada
Year and Trim: 2000 Bonniville SSEi L67
prime the pump by holding key in run position for 5 sec then open hood and see if fuel sprays out of valve on fuelrail.

_________________
poverty forces one to do unorthodox things

2000 SSEi
past rides:
1996 SSEi
1992 GTP
1987 Grand Am


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