Can anyone tell me where to find the fuse link for the fuel pump on a 1994 GMC Jimmy wiith a 4.3L Vortec engine... I am assuming that is the problem as the fuel pump doesn't spool up when I turn on the ignition switch
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Are you having more than one issue? With engine cranking, if no fuel pump, no fuel injector pulse--and no spark at the plugs, I usually check for missing rpm signal. These system may operate a little differently depending on year-- make and model.
What is your year--make--model?
As far as checking fuses, your owners manual should tell you what fuses for fuel pump and or fuel pump relay and where fuses are located. Your fuel pump needs voltage and ground. If you want me to post a wiring diagram, I need year--make--model, only vehicles sold in the US.
Click on the comment link for diagram. The gray wire carries voltage to fuel pump, when relay is energized. You see the ecm bat fuse, not only check the fuse, check the fuse circuit for voltage, hot all the time.
The ECM on the jimmy, is located on the passenger side fender well by the overflow tank. But before replace the ECM, inspect the fuel pump and fuel pump relay. The ECM sends power to the fuel pump relay and if the relay has gone bad will cause the fuse to blow which will kill the the power to the ECM, in turn kill the electrical power to the ignition system.
Start by removing the fuel pump relay and swap it with another relay and see if the fuse will blow again, if is does. Disconnect the fuel sending unit wire harness at the frame and see if the fuse blows again, if the fuse stays good. Chances are your fuel pump has gone bad or the fuel filter is dirty/clogged causing your fuel pump to draw more amp and will need to be replaced or the wire harness from the frame to the sending unit has a short which is common on older Jimmy's.
I have a 1994 Jimmy 4.3 Vortec it ran gd the other day now all t once it shut off on me while I was driving down the street! Have new fuel pump new rotor new distributor! It crank but not start! Would sumbody help me with dis!
Here is a link to your fuse panel. The fuel pump is controlled by the ECM through the fuel pump relay which is located on the firewall by the brake booster.
Thank you for using fixya, and good luck
A very common failure on these is the CPFI unit , or SPIDER as people like to call it.
There is one single injector which feeds each cylinder via a pipe and poppet. The injector becomes blocked and the engine won't start or run.
Before you go condemning this though, just make sure you have good fuel pressure because the fuel pressure regulator or fuel pump could also have a hand in the problem. Make sure the pump is running, and if not then check the fuse, the relay, and the pump itself.