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Can I get a diagram for the fuel system?

Tiny
AZDANNO04
  • MEMBER
  • 2008 CHEVROLET COBALT
  • 2.2L
  • 4 CYL
  • 2WD
  • MANUAL
  • 134,555 MILES
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.
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Tuesday, April 2nd, 2024 AT 6:02 AM

7 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 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.
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Tuesday, April 2nd, 2024 AT 8:45 AM
Tiny
AZDANNO04
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  • 285 POSTS
The fuel pump looks different from the one I installed?
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Tuesday, April 9th, 2024 AT 11:37 AM
Tiny
KEN L
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Can I ask which brand it is? Sometimes they will have design updates which can cause the pump to look a little bit different.
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Tuesday, April 9th, 2024 AT 5:51 PM
Tiny
AZDANNO04
  • MEMBER
  • 285 POSTS
I believe it was US motorworks.
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Wednesday, April 10th, 2024 AT 4:58 PM
Tiny
KEN L
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Okay, did you get the tank fill issue solved? Also does the engine start up and run?
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Thursday, April 11th, 2024 AT 10:29 AM
Tiny
AZDANNO04
  • MEMBER
  • 285 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?
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Thursday, April 11th, 2024 AT 11:13 AM
Tiny
KEN L
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At this point I say to recheck your work. Please use the instructions above.
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Friday, April 12th, 2024 AT 5:28 PM

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