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2000 Jimmy

Tiny
KCFANZ
  • MEMBER
  • 2000 GMC JIMMY
  • 6 CYL
  • 2WD
  • AUTOMATIC
Hard to start in the cold for a bit now. Then no start at all. Later the same day it finally started up with the help of a battery charger, but then it wasnt the same car as it was when we parked it the night b-4. Code P0300 Rapid mis-fire. Fuel pressure on rail within specs 11.9 ohms on each F-Injector, New tune up Even timing chain, Cleaned intake and plenum, still runs with mis-fire at low idle. Runs like a champ on free way now. Alot of power now after the tune up. Butt still misfires :(
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Tuesday, December 14th, 2010 AT 9:38 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Go to this link: https://www.2carpros.com/articles/engine-misfires-or-runs-rough
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Tuesday, December 14th, 2010 AT 9:55 PM
Tiny
KCFANZ
  • MEMBER
  • 3 POSTS
I have heard that the ball valves on the injector fail, could this be my issue? How do I check the ball valve?If the injector opens and gets heard how can you tell if the fuel is making its way out?
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Wednesday, December 15th, 2010 AT 12:16 AM

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