96 GMC Jimmy Hard Start

Tiny
BILL2448
  • MEMBER
  • 1996 GMC JIMMY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
96 GMC Jimmy with 4.3L hard to start hot or cold, will start with either, or you have to cycle the key approx. 45 times to get it to start. But if you boost it even if the battery is not dead it will start up right away with no either or cycling of the key. In other words as long as I put a boost on it, it will fire up right away with no hesitation or problems. Please help some say fuel regulator, some say fuel pump, some say the starter could be drawing to much power to allow fuel pump to run properly. It does not make any sense to me or my mechanic that if you boost it, it starts rightaway.
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Friday, January 14th, 2011 AT 3:59 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If I were you check the fuel pressure if its within specs to rule out the fuel filter and fuel pump-start here
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Friday, January 14th, 2011 AT 4:17 PM
Tiny
BILL2448
  • MEMBER
  • 2 POSTS
I have checked the fuel pressure and it is good well within specs but even if it was not why would this truck start perfectly fine with a boost but not without?
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Friday, January 14th, 2011 AT 9:41 PM

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