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1994 GMC Jimmy hesitation rough idle

Tiny
GARY73020
  • MEMBER
  • 1994 GMC JIMMY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 154,000 MILES
I have replaced sparkplugs, wires, Dist. Cap and roter bug,

I am just guessing that its either the ignition coil or timing chain.

if it was the ignition coil, dont those just go out all together. Disabling the vehical?

loose timing chain would be loss of power and rough idle
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Tuesday, February 26th, 2008 AT 11:19 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the engine compression to determine its internal condition. If it can produces equal amount of power through out the cylinders.

Check valve and ignition timing/look for vacuum leaks/test the ignition coil/check the fuel pressure/inspect PCV and EGR valves then report back your findings.
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Wednesday, February 27th, 2008 AT 3:36 AM

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