Question about Chevrolet C1500

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'93 Chevy C-1500 V6 4.3L w/TBI -stalls. I have changed distributor, cap, rotor, plugs, wires, coil, map sensor, fuel filter. Checked EGR, TPS, and fuel pumps a gallon every 2 minutes. No apparent vacuum leaks, battery and alternator good. Good compression on all 6. What suggestion would you have for me?

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  • maddmaxnc Oct 27, 2010

    Ended up being the little hose on the fuel pump. Replaced the entire fuel pump and runs like new.

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6ya6ya
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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: 89 chevy camro 305 tbi

There is a port on the fuel ine to check the pressure, it looks like a tire valve, it should have a plastic cap on it. Do you have a guage?

Posted on Jul 29, 2008

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SOURCE: 95 GMC Jimmy 4.3l W vin rough idle

My problem was solved when I repaired my 4 wd activation dash switch. The switch was contacting on 2WD & 4HI at the same time. The front differential activation is vacuum activated possibly creating a tug of war that didn't actually engage it but drained off vacuum from the engine? A theory at best but stumbbled across it because I knew the switch wasn't working properly I repaired it and low and behold rough idle disappeared and all is good for 3 weeks running.

Posted on Dec 10, 2008

csmock132
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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

  • 73 Answers

SOURCE: 93 TEMPO START CAR RUNS GOOD TILL TPS KICKS CHOKE

there is a tube coming off of the iac that causes that , it needs to be replaced

Posted on Jul 01, 2009

  • 462 Answers

SOURCE: need help with this 93 astro van

Have you checked for injector pulse with a noid light at the injector connector? You could have a bad ecm.

Posted on Aug 12, 2009

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1 Answer

Stalls out when put in gear. like not getting enough gas.


Need to verify air, fuel, ignition, and computer codes.
Is there a fuse blown or bad wire connection on battery, alternator, or grounds to frame?
For TBI ( Throttle Body Injection ) systems, is the check engine or Service Engine Soon light on or had come on?
That will most of the time tell you by the code what electrical computer sensor or component is faulty.
I recommend the Haynes Repair Manual for your specific year range of make and model. There are more trouble shooting helps and test with computer codes too.
When there are no codes in computer, check the MAP sensor vacuum line and connector; TPS sensor; distributor cap and rotor, spark plug wires, spark plugs and the spray pattern from the TBI injectors ( when engine is running ).
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