Question about 1999 Chevrolet K1500
When i try to start my tuck it doesn't start when i turn it all the way. If i turn it to ACC for a little bit then turn it all the way it starts. Is it my pump or relay
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Posted on Jan 02, 2017
Take the fuel line off before the filter and turn the key on and see if you get any fuel out of the line. If you don't get any fuel unplug the wire connector to the fuel pump turn the key on and see if you get a hot wire going to the pump. if you get a hot wire then it is your pump. If you do not get any hot wire then it should be the relay.
Posted on Mar 21, 2009
I've been bitten by this twice! The culprit both times was the connector plug under the van infront of the fuel tank. the second time the connector pin and socket came loose inside the plug itself,( workes for a while then dosen't). Make sure there is good secure contact made in all sockets in this plug, and the pins are held where they need to be inside the plug itself.
Posted on May 29, 2009
It sounds like you already solved your problem. Attach fuel gauge to fuel rail pressure line and monitor for fuel pressur (above 30 p.s.i. @ crank). If pressure low suspect pump. If pressure o.k. but dies out and pressure drops but restarts, check oil sending switch as this controls fuel pump. Computer primes pump for start, then oil sender powers up pump for normal operation. Check for oil leaking at terminals on sender. Also check plug connector at fuel sender on tank as they are known to melt and fail. If fuel not problem, check for spark as ignition module failure is common. Have obd2 diagnostic run to check for codes as this may help with diagnosis.
Posted on Dec 26, 2009
have you checked to see if you have a bad came or lifter. that would make it backfire. if it kind of spits fuel it maybe cam. if it throws fire than it could be timing like a bad chain.
Posted on Feb 12, 2010
SOURCE: fuel pump relay is not
Ok im a little confused. You said fuel pump relay is not picking up. Do you mean it is not engaging ( clicking)? If so then if you replaced it you should check to see if power is coming to your relay. The relay has two power sources; one is a constant source that is used when the relay is closed. The other is a power source that turns on a magnetic field that closes the other side of the relay. That is the clicking noise you hear. So when you say you close the relay im assuming you use a jumper wire and connect it from one end to the other and bypass the relay to turn the fuel pump on. Find a multimeter and turn it to volts and connect the ends of the multimeter to the side of the relay that is the magnetic field and check for voltage. you will have to take the relay out and stick the ends of the multimeter where the relay plugs in. To find which side the magnetic field is on you can go to alldatadiy.com and purchase a manual for the car or sometimes the relay has a picture on the back with numbers that tell you which side the magnetic coil is on. the picture of the magnetic coil looks like a curly pigs tail and the other side will have a picture with a line that is split with one side of the line open at an angle. connect it to that side and see if there is 12 volts on it when you turn the engine over. If not then you have a broken wire or possibly a fuse blown
Posted on Dec 29, 2010
Testimonial: "I checked for fuse and it is good, I will trace wiring and check output of the PCM. Thanks for your help"
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