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Gary
Gary, ASE Certified Technician
Category: GMC
Satisfied Customers: 16209
Experience:  GCM master tech over 25 years
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I have a 1996 GMC Jimmy. When it has been sitting like

Customer Question

I have a 1996 GMC Jimmy. When it has been sitting for awhile like overnight or during the time I'm at work i have a hard time starting it. The vehicle cranks fine but normally takes 3-4 seconds to start. Before it starts it will briefly hesitate (like a half of a second) than runs fine. If I turn the vehicle off and start it back up it starts up like nothing is wrong. Only when its sits will i have trouble starting it. What could be causing this?
Submitted: 9 months ago.
Category: GMC
Expert:  Gary replied 9 months ago.

I am sorry your having this problem

99 % of these doing this are caused by fuel pressure bleed off or the fuel pump drawing too many amps when cold

they usually boil down to bad fuel pumps

if the fuel pressure is below spec 60 PSI min key ON engine OFF or drops down to 0 within a second or two replacing the fuel pump will usually correct this issue you are having

if you have any questions please ask as i do not get credit for my work until you rate us here at Justanswer

Expert:  Gary replied 9 months ago.
how are you making out ?you can always get me back through this post for free with any follow up with this question anytime even after you rate us here at Justanswerif you have any questions please ask as i do not get credit for my work until you rate us here at Justanswer

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