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1996 Chevy S10 4.3 problem. Started surging at highway speeds and had code po300. Searched forums and found distributor has issues. Replaced distributor, module, cap, rotor and it seemed ok for a day.

Started surging at highway speeds and had code po300. Searched forums and found distributor has issues. Replaced distributor, module, cap, rotor and it seemed ok for a day. Started surging again and same code. Replaced plug wires with AC Delco, ran worse immediatally and gave code p1345. Recheckked timing, seemed good, ******** one tooth and code p1345 went away and ran pretty good. Drove for about 30 miles and it really started surging, po300 came back. Went to parts store to get injector cleaner, added to a full tank of premium, drove about 5 miles and surging got so bad, truck wouldnt go over 20 mph and it started popping a lot through the exhaust. Barely made it home. Ran to the parts store again and bought a crank sensor, and problem remains! HELP!!! I am loosing my mind! TPS Sensor tests good also. Code p1345 and po300 back on and it wont even idle, pops and stalls.

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Posted on Jan 02, 2017

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SOURCE: GMC Sierra 2002 4.3 V6 P1345

intake gasket i had the same problem with my truck

Posted on Mar 09, 2009

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SOURCE: 02 GMC Sierra 4.3 V6 P1345

Well that sounds like a tough one , But here is a site worth checking out . Several mechanics use this it to help out people like your self that are frustrated and are getting P #$%$# off ! Good luck

Posted on Mar 09, 2009

  • 6826 Answers

SOURCE: 1988 Ford ranger 2.9 standard

Change the stater in the distributor(hall effect).

Posted on Jan 05, 2010

  • 715 Answers

SOURCE: i have an 89 ford bronco 2 with a 2.9 liter it sat

check the spark plug wires are attached all the way till it snaps, pull each spark plugs, any black deposits on any plug means it isn't firing(faulty plug,or wire) last of all take off each injector wire and notice if there is a change in idle speed (plugged injector)

Posted on Apr 27, 2010

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