95 pontiac bonneville long start - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-04-2014, 04:52 PM   #1
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Talking 95 pontiac bonneville long start

The car runs great other than this and it just started doing this when I start the car it will spin and spin as if no fire or fuel. After two or three try'* it will crank and run fine. Any help is greatly appreciated.
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Old 06-04-2014, 07:57 PM   #2
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U said it urself: seam like u have fuel issue. Check the pressure make sure it doesn't drain over night
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Old 06-04-2014, 08:06 PM   #3
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The next time you go to start it and you expect it to do that again, this time, hold the throttle open just a crack and see what happens.
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Old 06-05-2014, 12:05 AM   #4
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I don't think it'* the fuel pressure because first thing in the morning it cranks rite up now when I drive to the store on the way to work which his 15 miles away and shut it off to walk in and get a drink. It will be hesitant to start back up. Mike I did start trying to crack the throttle and also pump it a little but I get the same result.
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Old 06-05-2014, 12:08 AM   #5
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Another possibility for an extended crank is the fuel pump relay is fubar, then after cranking a few turns, oil pressure builds and the oil pressure switch closes, sending power to the fuel pump...

Another thing to try.....turn key to on.....shut off, wait 5 seconds, turn key to on....turn off for 5 seconds, and then see if the car starts right away.....
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Old 06-05-2014, 06:59 AM   #6
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Where is the fuel relay ? I thought the oil pump ran off the crank shaft not electric ?
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Old 06-05-2014, 10:53 AM   #7
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oil sensor is a second redundant way to turn on the pump so you arent stranded, it bypasses the relay.


the issue sounds to me like heat soak, which is normally the crank sensor or icm. if you get it to where it doesnt start then check for spark.
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Old 06-05-2014, 01:02 PM   #8
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Icm= ignition control module ?? Also is the crank sensor down by the harmonic balancer ??
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Old 06-05-2014, 02:05 PM   #9
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Quote:
Originally Posted by Shawnro View Post
Icm= ignition control module ?? Also is the crank sensor down by the harmonic balancer ??
Yes, and yes.

If it was the crank sensor there would be a no-start, not a hard-start.
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Old 06-05-2014, 02:23 PM   #10
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Ignition control module is definitely a suspect. More likely than a fuel pump issue which would give you a hard start hot or cold. The other thing you might want to check (because it is so easy to check) is the fuel pressure regulator. Pull the vacuum hose off the fuel pressure regulator (canister shaped part mounted on the fuel rail) and smell the hose for gasoline. If you smell gas, replace the FPR.
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