Question about Chevrolet Silverado 1500
.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.
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."
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Posted on Jan 02, 2017
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
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
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
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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