Not cranking

Tiny
EVERYTHING
  • MEMBER
  • 1997 GMC SONOMA
  • 6 CYL
  • 2WD
  • AUTOMATIC
1997 or 98 GMC Sonoma not cranking, just turning over.
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Thursday, January 20th, 2011 AT 6:39 PM

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Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Have a helper crank it, while you visually check for spark at the plugs. If you have spark everywhere, use a gage and check fuel pressure. Some of the national brand autostores used to loan out a fuel pressure gage.

To check for spark at the plugs, you pull a spark plug wire loose, use known good spark plug or spark tester in the boot. Ground metal part of tester to metal part of engine, engine cranking, watch for spark. How long since a tune-up?
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Thursday, January 20th, 2011 AT 6:51 PM
Tiny
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Summer was last tune up. Already done the plugs. What do you think is next?
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Thursday, January 20th, 2011 AT 10:42 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Did you visually check for spark at the plugs. New plugs doesn't mean there is spark. Did you check fuel pressure, what is the fuel pressure spec?
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Friday, January 21st, 2011 AT 4:37 PM

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