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I have a 94 Chevy 2500 that has a bogging down issue. Idles fine but Boggs down when driving. It's a 4 speed. I have replaced map senser. Plugs and wires, all vacum lines. Catalytic converter, ran a can of b12 through it. Fuel filter. Air filter. Egr valve and egr senser. I am out of ideas please someone help?!!!

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  • Cars & Trucks Master
  • 5,642 Answers

Hi looks like mine problem.looking for ideas.Crankshaft sensor or TPS sensor[RPM].I swapped coils and module.No light and what it is?

Posted on Apr 27, 2013

  • 2 more comments 
  • Preston Giles Apr 28, 2013

    I don't have a light on. I'm completely out of ideas.

  • Bogdan Odwazny
    Bogdan Odwazny Apr 28, 2013

    Someone said to remove catalytic con.because gas has sugar.

  • Preston Giles Apr 28, 2013

    I cut mine off and still have that problem. I'm gonna replace the throttle positioning senser tomorrow see if that fixes it

  • Bogdan Odwazny
    Bogdan Odwazny Apr 28, 2013

    I was thinking TPS because control RPM.

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Posted on Jan 02, 2017

csmock132
  • 4669 Answers

SOURCE: 1989 GMC 2500 5.7L - engine surges and stalls at idle. Loses power at cruising speed.

Wow you have replaced a lot of stuff. Lets go back to the Fuel pump. When you replaced it did you replace the hose between the pump and the sending unit. These are common for splitting. Have you hooked up a fuel pressure gauge to check what pressure you have? It should be real close to 13 psi and should raise to at least 18 or 19 when you pinch off the return line.

Posted on Jun 02, 2009

duane_wong
  • 6826 Answers

SOURCE: 95 chevy k 1500 bogs down at over 1/4 throttle

You certainly have changed a lot of parts on this engine. Do you presently have any codes on it?

Posted on Feb 08, 2011

emissionwiz
  • 75797 Answers

SOURCE: 1995 gmc sierra 5.7 350. rough idle in gear when warmed up poor fuel miledge. changed vacum lines between throttle body and pvc,t-body and evap can. purge solenoid ,egr and map sensor.egr engine code

It sounds like you may have low compression in one or more cylinders, suggest you run a compression test, this should always be done when this condition exists and igintion is not source of problem. This engine also can have issues with intake manifold leaks, use a can of carburetor spray and spray around the intake gasket are to cylinder head, if a leak is present then the idle change when you hit the leak.

Posted on Dec 08, 2011

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