IHADAV8.com - Turbo Buick Tech, and Nonsense

Tech Area => General Buick Tech => Topic started by: smokin-6 on June 08 2012, 11:27:02 AM

Title: Fuel line question
Post by: smokin-6 on June 08 2012, 11:27:02 AM

I am putting in my new engine (well, spare low mileage stock block with roller cam & ported 8445's). I have replaced my fuel pump with a racetronix pump last year and I already had a hot wire kit.

I do notice that my vent line (the one from the black canister to the tank) is clogged. When I would drive the car around and then un capped the gas cap, tons of air/pressure escapes. I tried to use some compressed air in the end of the line by the canister and also at the other end when I replaced the pump, but it does not flow. Is this common? The car drove fine but I want to make sure it is safe.

Any ideas on how to cure this??

Title: Re: Fuel line question
Post by: Steve Wood on June 08 2012, 02:28:42 PM

No, that is not common.  Your tank is liable to collapse unless you put a vented gas cap on the car, or find out what is stopping you from blowing air thru the line from end to end...Is the rubber hose collapsed internally on one end, or the other?

Title: Re: Fuel line question
Post by: gbsean on June 08 2012, 03:01:40 PM

did you pinch the hose when you put the tank back in

Title: Re: Fuel line question
Post by: smokin-6 on June 09 2012, 09:12:37 AM

Steve, When I had the tank out it did not look collapsed on either end. I kinda remember it always had lots of pressure at the gas cap for years (15 +yrs). It was until recently that
I checked it when I did my new pump. Who sells a vented cap?

Sean, The hose was not pinched when I re installed the tank. This line did not flow air with the compressor when the tank was out. I thought maybe it had some dirt clogging the line but I don't see how it could get in their, it is not exposed.

I guess I will try to replace all the rubber sections on the line.

Title: Re: Fuel line question
Post by: Steve Wood on June 09 2012, 10:07:29 AM

don't know who sells one for the later cars...I would first pull the rubber off the vent line on both ends and see if you can blow thru the steel line only...if no, trace it all the way from one end to the other to see if it has been crushed at any point

Title: Re: Fuel line question
Post by: Steve Wood on June 09 2012, 10:08:54 AM

be sure to blow back into the tank on the vent line as well to be sure the problem is not in the tank plumbing

Title: Re: Fuel line question
Post by: smokin-6 on June 09 2012, 11:46:43 AM

If I blow back into the tank thru the line can it damage anything in the tank/pump??

Title: Re: Fuel line question
Post by: Steve Wood on June 09 2012, 12:16:19 PM

NO

Title: Re: Fuel line question
Post by: gbsean on June 09 2012, 08:47:36 PM

also make sure you pick the correct hose on the canister as the one going to vacume block has a check valve