Help! Gas Leak...
Thread Starter
Melting Slicks
Joined: Feb 2002
Posts: 2,956
Likes: 2
From: Indianapolis In
Help! Gas Leak...
It was nice out yesterday so I decided to drive the car. This morning, at 5am there was a puddle of gas under the driverside rear & behide it. Now( 8:30) the puddle is gone but the smell is still real bad. I will open the door & air it out but I am afraid to start the car to pull it out.
Has anyone had a gas leak b-4. I don't remember reading about one. The tank was about 1/3 full when I parked it yesterday. Any thoughts? Thanks.
Has anyone had a gas leak b-4. I don't remember reading about one. The tank was about 1/3 full when I parked it yesterday. Any thoughts? Thanks.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Agreed. The fuel filter is the first suspect. You shouldn't dare drive it till its fixed due to major safety issue since the exhaust pipes are right there. The second suspect is the cross-over tube.
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
There seem to have been a lot of fuel leaks recently. I took a look at the book and there are a few connections that could leak.
Start by examining the fuel filter connections next to the exhaust system.
The main fill pipe routes from the cap to the tank. There’s a connector at each end of the fill pipe. One of the early problems was slow filling and GM redesigned the fill pipe to get a better flow.
1. Fuel filler hose
2. Vent pipe
Next check the fuel sender, the aux fuel rear return pipe that connects the jet pump to the left tank and the aux fuel feed rear pipe that connects the left tank to the jet pump at the fuel sender. The FLVV hose routes to the EVAP canister. Finally the crossover pipe connects the two tanks but that’s at the top of the tank so I guess it would be hard to see from below.
1. Auxiliary fuel return rear pipe from the jet pump to the left tank.
2. Fuel return rear pipe.
3. Fuel feed rear pipe at the fuel sender
If the leak doesn't show until the tank is getting full that would be the time when the fuel is starting to fill the right tank via the crossover pipe. It may give a clue.
1. Left fuel tank EVAP pipe.
2. EVAP pipe quick-connect fitting.
5. Tank crossover hose 1. Left fuel tank EVAP pipe.
2. EVAP pipe quick-connect fitting.
5. Tank crossover hose
I've never looked in there so not sure how easy it will be to see all these connections but I'd guess you'd need to get the car up on a lift.
HTH
Start by examining the fuel filter connections next to the exhaust system.
The main fill pipe routes from the cap to the tank. There’s a connector at each end of the fill pipe. One of the early problems was slow filling and GM redesigned the fill pipe to get a better flow.
1. Fuel filler hose
2. Vent pipe
Next check the fuel sender, the aux fuel rear return pipe that connects the jet pump to the left tank and the aux fuel feed rear pipe that connects the left tank to the jet pump at the fuel sender. The FLVV hose routes to the EVAP canister. Finally the crossover pipe connects the two tanks but that’s at the top of the tank so I guess it would be hard to see from below.
1. Auxiliary fuel return rear pipe from the jet pump to the left tank.
2. Fuel return rear pipe.
3. Fuel feed rear pipe at the fuel sender
If the leak doesn't show until the tank is getting full that would be the time when the fuel is starting to fill the right tank via the crossover pipe. It may give a clue.
1. Left fuel tank EVAP pipe.
2. EVAP pipe quick-connect fitting.
5. Tank crossover hose 1. Left fuel tank EVAP pipe.
2. EVAP pipe quick-connect fitting.
5. Tank crossover hose
I've never looked in there so not sure how easy it will be to see all these connections but I'd guess you'd need to get the car up on a lift.
HTH
