No spark

Tiny
DUST
  • MEMBER
  • GMC C1500
Have a 92 chev k1500 - 4.3l - 5 spd. Manuel - 200,000 miles - when truck has warmed up has no spark - starts fine cold - heat seems to be taking a component out of the ignition system - has a new fuel pump - fuel pump relay - starter - alt. - And coil - plugs - wires - cap and rotor - scan found code only for o2 sensor intermitent - tach is jumpy at times - any one have any ideas where I should look next - thanx
Sunday, April 23rd, 2006 AT 10:04 AM

1 Reply

Tiny
DUDER1
  • MEMBER
  • 15 POSTS
Have a look see at the fuse box. Check out the fuses labeled ECM, or ECM1, check and replace. The next place I would suspect is the modual in the distributor. This tends to be an issue most of the time with 2.8's, and 4.3's. If all else fails. Check out the oil sending unit, it may be on it's way out. Just unplug it, and give it a whirle. Good luck, hope this helps.
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Sunday, April 23rd, 2006 AT 10:25 PM

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