2008 Chevrolet Cobalt Can I Get a Diagram for the Fuel System

azdanno04 · 2024-04-02T06:02:48+00:00

If you guys can provide me with the diagram for the fuel system. I installed a new fuel pump, and I checked it twice. I have a vapor lock, can only put a few gallons in the tank then fills up at the filler neck. Which hose is the return hose that might be bent. Also, the gas gauge doesn’t change since I replaced the fuel pump.

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

It sounds like the fuel pump is installed incorrectly. Also please check the filler tube to make sure there are no obstructions. Here is the correct way to remove the fuel tank and install the fuel pump which looks like it has EVAP tubes connected to it. Check out the images (below). Please let us know what happens.

Images (Click to enlarge)

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Apr 2, 2024 at 8:45 AM

AZDANNO04

MEMBER
348 POSTS

The fuel pump looks different from the one I installed?

Apr 9, 2024 at 11:37 AM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

Can I ask which brand it is? Sometimes they will have design updates which can cause the pump to look a little bit different.

Apr 9, 2024 at 5:51 PM

AZDANNO04

MEMBER
348 POSTS

I believe it was US motorworks.

Apr 10, 2024 at 4:58 PM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

Okay, did you get the tank fill issue solved? Also does the engine start up and run?

Apr 11, 2024 at 10:29 AM

AZDANNO04

MEMBER
348 POSTS

The engine starts up and runs. I just have to check the return vent hose to see if it was bent or blocked. I wonder if the short I have with the grounds has anything to do with the fuel sending gauge. Or if it's in the tank incorrectly? I had checked it twice. But I may have the floater wrong possibly?

Apr 11, 2024 at 11:13 AM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

At this point I say to recheck your work. Please use the instructions above.

Apr 12, 2024 at 5:28 PM

Can I get a diagram for the fuel system?