So the fuel pump fuse on my 2008 Cobalt SS keeps blowing. Usually after the car is run for 15-20 minutes. I took it to the dealer and they wanted to charge me for all this testing. I put up a stink with the GM and they agreed to test it for free. Obviously I don't trust them. They couldn't find what is causing the problem and suggested they replace the fuse box. I said "no dice" and am now trying to figure out the problem myself. I could go into what I've read, but most people here know more than I do. So please if you've seen this issue before and have a solution or proposed solution I could really use the help! Thanks!

 

Well 08 should still be under warranty so make them fix it until they get it right...where you from in pa

 

Also wanted to note they did swap out the Fuel Pump

 

Did you try checking out a wiring diagram and tracing the fuel pump circuit wiring, checking for a rubbed wire somewhere causing a ground or short?

 

something is shorting to ground. If you can find someone that has a power probe and KNOWS how to use it. Finding the short is fairly easy. Sorry I cant be of a whole lot of help, but there are miles of wiring in this car. Since they replaced the fuel pump, I would start there and work my way forward.

l8r,
PD

 

I am having this problem. If I give the car anything more than 5psi of boost it falls on its face, and blows a fuel pump fuse. then after I replace it, it has full power until it gets cold again, and repeats. Any ideas?