Question about 1991 Chevrolet Silverado 2500

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1991 Chevrolet Silverado C1500 hard to start when cold. Rebuilt TBI, replaced fuel filter, good fuel pressure pressure. After several crankings 20-25 times it will finally start, and run and drives ok. After setting 1 hour difficult to start again.

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  • Douglas Hansen
    Douglas Hansen Sep 30, 2010

    Make sure your temperature sensor (for the computer) is correct. You will need to hook up a scanner for this.



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  • 29 Answers

I have seen this problem before ck the coil and coil wire and also condition of distributer cap and rotor,ck the coil and coil wire for white corrosion or black burned ends,hope this helps

Posted on Sep 30, 2010


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Replaced fuel pump, fuel filter and sensor, 2002 silverado, truck starts but spits sputters and

Be sure you are getting good fire to the plugs and if you are take a spray bottle and spray fuel into the tbi and if it runs ok then you have a fuel problem, your pressure regulator in the tbi could be week and not putting enough fuel to the tbi. If not you need to pull the o2 sensor out ahead of the catalytic converter and see if it runs ok if it does then you either have a plugged cat or muffler. To much back pressure on the engine will not allow it to draw fuel into the cylinders and fire the fuel. Hope this helps.

Dec 02, 2012 | 2002 Chevrolet Silverado

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Vehicle has to crank for several seconds before turning over. Is this a symptom of a fuel pump malfunction?

HI there not all the time it could be clogged fuel filter
Or pressure regulator.
Put first replace fuel filter and see if engine starts normal. OK

good luck


Jul 05, 2011 | 1999 Chevrolet Silverado 1500

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1990 chev K2500 5.7 TBI driving down highway and just quit like i turned it off. pulled over will idle fine but off idle tries to die. after shutoff for a few minutes starts an has throttle respose for a...

Fuel injection needs 20-30 pound pressure to fire the injectors. Try to check pressure before filter. If its low your pump is no good. If its ok then you have pressure drop after the filter. Filter on backwards or clogged.

Nov 25, 2010 | 1990 Chevrolet K2500

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I have a 1990 c1500 4.3 tbi when it is cold starts up fast and after it warms up it floods and is hard to start. In both cases after it starts it runs very good.I replace all the sensors and it did not...

If the connector to the coolant temperature sensor is loose, that could be causing the problem since that controls certain functions of the computer when the vehicle is warm vs. cold.

Sep 24, 2010 | 1991 Chevrolet C1500

2 Answers

1994 chevrolet 5.7 TBI running like poop

Fuel enrichment? The TBI /ECM system increases fuel mixture when cold starting. If you have low fuel pressure or dirty injectors it will impeed this function. The computer will continuely try to solve but cannot do to the low fuel function, should get it fixed right away as it will burn out the phase of the computer that controls this. Fuel pressure test first, it should hold between 9 -13 lbs of pressure. If you have not changed the fuel filter inline located on the frame do so $10 and it could be the fix. You can hookup a timing light and point at the injectors and this will illuminate the spray making it easier to see, the spray also will run in time with the light so if it is not there is a sequence problem between modulator, computer and possibly a crank/cam position sensor. Good Luck

Apr 30, 2010 | 1992 Chevrolet C1500

1 Answer

Fuel filter was clogged on 1991 Chevy Silverado. Put on a new one, now truck starts, but dies within a minute.

make sure filter was not installed backwards,then check fuel pressure at reed valve on fuel rail,you will need at least 55psi of fuel pressure to start truck

Jan 23, 2010 | 1991 Chevrolet C1500

1 Answer

Running extremly rich

I recommend you check the fuel pressure regulator diaphragm for proper installation and tears. Did you get a new one with your rebuild kit?

Jul 01, 2017 | 1990 Chevrolet C1500

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