Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello I am reggie let me help you. IT does sound like you have a fuel problem and you say the gauge isnt working and it was, do you hear the fuel pump run?
Had you been having any performance issues at all with your truck? If you are not hearing the pump, access the fuel pump relay in the under hood box, do you have a voltmeter, test light>
well here is an easy one to try take a hammer and have someone try to crank it and while they are attempting to start you whack the bottom of the tank in the area were the pump is located it will start
Okay when a fuel pump fails it is just like any other electric motor either the brushes or the communtator have a bad spot in them and when you take that hammer and hit it it will start working and if it does well we know for a fact you have a bad fuel pump
I went that route because you stated you didnt know how to use a voltmeter.
the hammer is how we get them started when they are towed in and we dont feel like pushing them in shop
Okay here is what you can do, remove the fuel pump relay on the bottom of the relay are some numbers
85 86 87 30
take your test light and make sure you have voltage on either 30 or 87 at all times if you do put a jumper wire in between 30 and 87 that sends power directly to yoru pump
You cannot check the ground in the fuse box it is back by the tank on frame rail
Okay you did it right, with your jumper in place go back there and hit the bottom of the tank
okay im bout to go to lunch i will ck on you when i get back
It doesnt matter about the key. Okay do you see the connector for the fuel pump
exactly what fuse was blown
the reason i ask is earlier you checked and you had power on the relay and you had not replaced a fuse then
when you say exam fuse do you mean the ecm fuse?
And it is labeled ecm? okay let me look this up
sir very important here was it labeled ECMB
oR was it ecmi I think it would have been ecmi because that fuse also supplies power to fuel composition sensor its back under your truck i bet you hit it or cut a wire get under there and unplug it replace fuse and crank vehicle
I am not saying you cut them i meant that when you backed in the ditch there is a sensor under truck that is tied in on that fuse and if you hit it perhaps some damage and that may have been where the fuse was blowing
And following the steps that i gave you you found out that the relay had power you jumped that power eliminating a possible faulty relay, I know you are frustrated, but please understand i work with what i have you stated you didnt know how to read a voltmeter which is okay most dont therefore i put you through some test that didnt require use of one. The fuse you are describing powers up the ecm and the fuel composition sensor, which i might add i have seen several of them short out and blow that fuse
You getting a fuel pump is firing the parts cannon. Now if you want to fix this or at least get an idea what you have I am the man for the job i know every nut and bolt on that trucck and every wire color,, Hit me up and we will start over.
Actually your making sense. Plus a fuel pump is a very common failure on your truck actually it's about all that goes bad. Are you going to put it in, it's not a bad job o can tell you some good shortcuts. And one thing when u buy pump insist on a Delphi pump
A good Delphi pump will set you back a couple hundred you got 2 straps, a filler neck and some evaporater hoses, I can wall you through it save you several hundred bucks
Okay sounds like u got the good pump unless it's been changed before you will have to solder in a new connector, be sure the rubber seal for the pump is seated good. And once you got it in try n start it before u put the tank all thr way back up, incase we still have a problem. Another thing get a new fuel pump relay. Does yours have a fuel filter? If so change it. Something else that kinda bothers me u said thr fuel gauge didn't work was thst the only gauge inoperable? IL be looking to hear from u today
Did you have to install a new connector? The gray wire is the power wire to the pump put your test light in between the black and gray wires and have someone try to start it
When you turn your key on does your check engine light up?
Also go back to the relay and jump 30 to 87 again ck for power on either 30 or 87
And dont worry you didnt waste any money on the pump if it wasnt bad it was just a matter of time