Question about Chevrolet Silverado 1500

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1994 Silverado with the 5.7...

.runs down the road just fine and then it just drops off untill it almost dies and pops right back to normal. changed fuel filter and TPS sensor along with a tune up. Fuel pump? Speed sensor? Distributer? ICM? Hope someone has an idea, dont want to just throw parts at it.

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  • 179 Answers

Fuel pump is good guess you need 60-66psi pressure KOEO(engine off).but will have hard starting problem to.Inspect cap and rotor or ignition wire (part of the tune up)

Posted on Mar 23, 2014

Testimonial: "starts right up though, after a couple seconds i guess, but starts right up everytime, even during the cold we had."

  • wolf
    wolf Mar 24, 2014

    ignition system? losing spark?do you have black smock wile you driving?did engine misfire on hard acceleration?did you pass last emission test ?low oil pressure switch is connected to the ignition to.

  • wolf
    wolf Mar 24, 2014

    let somebody retrieve engine codes from computer and post the #. you can do your self but need to jump two wire from diagnostic plug and count the flashes on CELight or service engine soon light.Two digitcode.one long is 10 one short is 1. ex: code 35 will be 3 long 5 short flash

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Posted on Jan 02, 2017

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SOURCE: 1997 Grand Prix GTP starts but wont run for more than 5 Sec

is this a supper cahrged grand prix if so check fuel pump resistor located behind right front head light or on fire wall its made of white ceramic has to wires going to it jump the two wire on the connection going to it if it runs longer then 15 min then replace resiustor.

Posted on Jan 03, 2009

  • 88 Answers

SOURCE: engine stall

have you checked fuel pressure regulator.hopefully this helps

Posted on Oct 18, 2008

  • 134 Answers

SOURCE: 1986 corvette running rich at idle, give it gas

have you tried checking the map sensor this can sometimes cause the engine to run oddly. also check for good spark check wires when its pitch black out check for wire arching. also check fuel pressure with a pressure guage.make sure cap and rotor are clean of deposits. keep searching and you will find the weak link.

Posted on Oct 08, 2009

  • 1509 Answers

SOURCE: my 1999 dodge ram 5.2 liter 5 speed will start up fine then..

It runns OK when you first start it? This is a stick shift truck? They are prone to a vacume leak in the bottom of the intake manifold. To checki this pu;; the PCV valve out of the valve cover and plug the hole in the cover and let the valve just hang there, Remove the hose from the other side valve cover and plug the valve cover ( the hose goes to the air filter housing ) Run the truck with both of these plugged and if it fixes the problem. Remove the intake manifold and change the gaskets. This is a common problem and for a while there the dealers were covered up with this job.

Posted on Dec 14, 2009

  • 192 Answers

SOURCE: 1994 chevy with 5.7 L

Sounds like you have a vacuum leak. When the engine is cold the leak is there but as the engine warms up the parts start to expand thus closing the gaps and sealing the leak. I had this problem on my personal vehicle and it turned out to be lower intake gaskets.

Posted on Jan 29, 2011

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