1986 Chevy S-10 HEI

1986 CHEVROLET S-10
108,000 MILES • 4 CYL • 2WD • MANUAL
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WDANIAL
  • MEMBER
  • 1 POST
My engine code is showing a 42 code does this mean my hei module is bad. I think my problem is in the oxy sensor. Truck won't start and act like there is no gas. When fuel line at the "carb" is loosened i have fuel pressure when trying to start.
Mar 4, 2009 at 5:53 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Hello, I'd check for spark at the plugs, with the engine cranking. If there is no spark and the coil is in the cap, use a testlite on the tach terminal, should be a pulse with the engine cranking. You could also check for b+ at the coil.
Mar 4, 2009 at 6:21 AM
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