Question about 1990 Chevrolet K1500

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I have a 1990 Chevy K1500 350 5speed. I have a problem with the truck starting up and idling just fine, then when I give it fuel, it revs up just fine. The problem is when you put the truck in gear, it looses all power, like the truck isn't feeding enough fuel to keep it running. I have replaced the plugs, distributer and cap, fuel pump, fuel filter, and the heat sending unit. What could be my culprit?

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  • Chevrolet Master
  • 1,250 Answers

Converter catalytic
you can do a back pressure test with special tool or
disconnect exhaust system at manifold and try to see if power is coming back
meaning the converter catalytic is block or restriction to exhaust system

Posted on Oct 14, 2013

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Posted on Jan 02, 2017

  • 352 Answers

SOURCE: Transmission Problem

Its flood a tranny sensor causing a circuit fault, rain water conducts electricity. Locate this/these sensors and coat them with a sealing agent, your local auto parts store will have the stuff you need. No water, no short.

anaanymous

Posted on Oct 11, 2008

csmock132
  • 4669 Answers

SOURCE: 87 chevy truck with TBI idles too fast

Spray the intake with carb cleaner to find the vacuum leak. Check where the EGR mounts and the throttle body gasket sense you had both off.

Posted on May 10, 2009

  • 1 Answer

SOURCE: 2001 chevy truck V6 Occasional miss/fuel problem during driving

Common on these for the fuel injection spider to go bad.

Posted on May 14, 2009

  • 17 Answers

SOURCE: I have a 1989 Chevy 20 van with a 5.0. It starts

Replace your idle speed control valve.

Marty de

Posted on Jun 04, 2009

  • 12 Answers

SOURCE: truck idels fine but put into gear stalls

you need to adjust the engion timing

Posted on Jun 19, 2009

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