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2000 GMC Jimmy Hard to start in AM

Tiny
CCOONEY66
  • MEMBER
  • 2000 GMC JIMMY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 93,000 MILES
My Jimmy is hard to start in the morning. Fuel pump and filter have been replaced. You can hear the pump working when trying to start it. Starter fluild in the intake helps, so does connecting jump cables as if the battery is dead. When I get it to start, it will work fine for the rest of the day but won't start again in the morning. Please help.
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Read more at http://gmcowners.com/gmc-forum/showthread.php?t=15588&kcplink=1
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Thursday, October 7th, 2010 AT 11:40 AM

3 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Do you have the spider fuel system, I'd still have to check fuel pressure, key on engine off 60--66psi. Sometimes the fuel poppets need cleaning.
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Thursday, October 7th, 2010 AT 12:19 PM
Tiny
CCOONEY66
  • MEMBER
  • 2 POSTS
JDL, Don't know waht the fuel system. How can I tell which system? When fuel pressure was checked three months ago, it was good with same problem. I can only find the pressure problem while the Jimmy is malfunctioning correct (i.E. If I get it started and check pressures, it will probably be good)?
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Monday, October 11th, 2010 AT 5:46 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Any problem, you have to test when the problem is ongoing. The partsbook showed you have the spider fuel system. The 60--66 psi is key on engine off. Usually with engine running, it will run ok with less pressure.
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Monday, October 11th, 2010 AT 5:57 PM

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