C6 Fuel Filter location
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Joined: Jul 2005
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From: Central MO
They have been non-serviceable since about 2003. The EPA weenies don't want normal idiots dripping fuel on the ground when changing fuel filters.
There is only a fuel strainer/filter on the inlet side of the fuel pump now so you have to drop the tank if you want to change it. It's supposed to be a "lifetime" filter.
There is only a fuel strainer/filter on the inlet side of the fuel pump now so you have to drop the tank if you want to change it. It's supposed to be a "lifetime" filter.
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Joined: Jan 2018
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From: Florence, AZ
Fuel leaking back to tank
I have a base 05 Vette and some times it takes a few seconds to start because the fuel has leaked back into the tank. I just hate to think that I have to take the tank out to fix this problem. I know there is a fuel filter/regulator back near the tank that regulates fuel pressure and returns un needed fuel back to the tank. Is there a one-way valve in this filter/regulator? Could the leak be in the regulator part allowing fuel to leak back through the return line? Also, if not and the only check valve is in the tank is there a way to install one between the filter/regulator and the tank? If not there should be! Any ideas of a fix without having to pull the tank would be appreciated.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 807
From: West coast CA
I have a base 05 Vette and some times it takes a few seconds to start because the fuel has leaked back into the tank. I just hate to think that I have to take the tank out to fix this problem. I know there is a fuel filter/regulator back near the tank that regulates fuel pressure and returns un needed fuel back to the tank. Is there a one-way valve in this filter/regulator? Could the leak be in the regulator part allowing fuel to leak back through the return line? Also, if not and the only check valve is in the tank is there a way to install one between the filter/regulator and the tank? If not there should be! Any ideas of a fix without having to pull the tank would be appreciated.
Confirm that you have a fuel pressure problem with a gauge on the test port at the fuel rail. If you do, make sure there isn't an external leak or leaking injector.
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Joined: Jan 2018
Posts: 94
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From: Florence, AZ
Thanks for your reply. I did the fuel pressure check and did not find a problem but it is intermittent so it well could have been working fine when I did that check. I had the injectors tested and cleaned so there should not be a problem there. I have not smelled gas in the garage so I do not think it is a leak anywhere and I would think if it was a leak that the problem would be there all the time not intermittently. Has anyone ever tried putting a fuel line with a check valve between the tank outlet and the line that attaches to it heading to the fuel rail? It seems like it might solve the problem or at the least lessen the time it takes to get fuel to the injectors.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 807
From: West coast CA
Thanks for your reply. I did the fuel pressure check and did not find a problem but it is intermittent so it well could have been working fine when I did that check. I had the injectors tested and cleaned so there should not be a problem there. I have not smelled gas in the garage so I do not think it is a leak anywhere and I would think if it was a leak that the problem would be there all the time not intermittently. Has anyone ever tried putting a fuel line with a check valve between the tank outlet and the line that attaches to it heading to the fuel rail? It seems like it might solve the problem or at the least lessen the time it takes to get fuel to the injectors.
If you do have a leaky check valve, I just fix it right. Dropping the tank isn't that bad.
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Joined: Jan 2018
Posts: 94
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From: Florence, AZ
Here is some more info. I have just had to replace the cam and install new lifters. I am sure you know what that intales. The issue with starting and having to wait for fuel to get to the injectors happened just before I started tearing the car down for the cam and lifter job. The car has always run fine after it started up. The first few starts after I finished the cam/lifter job were fine but the last few I have had to wait for fuel to get the the injectors then once it starts it is fine. What are the symptoms of a cam sensor problem? If that is having a problem would that show up on a scan? Would a cam sensor problem just show up when starting the car and then be fine after it started running? Appreciate your help, Dan
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Joined: Jan 2018
Posts: 94
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From: Florence, AZ
I just posted a new thread in C6 tech/performance and explained the problem and steps I have taken to find out what is going on. It is still very baffling to me. Hoping to get some help from my new post.
Thanks,
Dan
Thanks,
Dan