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1995 Pontiac Bonneville Won't start when engine is hot.

Tiny
CHAPPY13
  • MEMBER
  • 1995 PONTIAC BONNEVILLE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 210,000 MILES
Starts right up when engine is cool. Drive it till it warms up and shut it down 15 minutes and she won't start again. Almost sounds like a flooding sound. Tries to start, But it spits and sputters and dies right away. I did notice the fuel in the fuel rail was "warm" to "hot". I have to release the pressure in the fuel rail to get it to start again unless I let it cool down for 30 minutes. Thanks.
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Tuesday, April 6th, 2010 AT 12:26 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,640 POSTS
Hi:
When this happens, have you ever actually checked the fuel pump pressure at the rail? If you need to release pressure, it almost sounds like the regulator is bad. Also, have you ever checked to see if the car is getting a good hot blue snapping spark to the plugs? A weak ignition module can cause that and it won't be able to burn the fuel until it cools down.

Let me know. Also, let me know if the check engine light has come on.

Joe
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Sunday, April 18th, 2010 AT 11:16 PM
Tiny
CHAPPY13
  • MEMBER
  • 4 POSTS
No "Check Enigine"lights come on. I will try the fual pressure check. Have pulled the Vac. Tube off to "check" the regulator, But not wet with gas at all. Will try this 1st and get back to you. Thanks
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Monday, April 19th, 2010 AT 5:29 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,640 POSTS
Let me know.
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Monday, April 19th, 2010 AT 6:40 AM

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