Author Topic: What size is the fuel line (Read 10644 times)

fb_rider · « **on:** August 11, 2006, 10:36:52 PM »

I want to replace my rubber fuel line to and from the fuel pump (it appears to be pretty soft) and I want to buy it before I start to remove the old pieces. Does anyone know what diameter that rubber fuel line is?

Banditboy21 · « **Reply #1 on:** August 11, 2006, 11:06:29 PM »

i believe it is 3/8 fuel line but it could be the smaller 5/16 line just take a piece of line with u and match it up

MrMojoRisin681 · « **Reply #2 on:** August 11, 2006, 11:49:11 PM »

If the Pontiac Engines are the same as the Chevy's it's 3/8".

Maryland Bandit · « **Reply #3 on:** August 13, 2006, 01:58:11 PM »

Fuel line supply is 3/8". Vapor return is 5/16". Be especially wary of the rubber line behind the left front tire. Mine had a pinhole in it after 27 years. Neighbor ringing the bell telling me about the puddle outside got me on it. Man, can you imagine in a garage? :shock: It's about a foot long piece of 3/8" hose from the frame rail metal line to the crossmember metal line. Took all of 10 minutes to fix,but those GM pinch clamps are a pain.

MrMojoRisin681 · « **Reply #4 on:** August 15, 2006, 09:11:22 PM »

Quote from: "Maryland Bandit"

Fuel line supply is 3/8". Vapor return is 5/16". Be especially wary of the rubber line behind the left front tire. Mine had a pinhole in it after 27 years. Neighbor ringing the bell telling me about the puddle outside got me on it. Man, can you imagine in a garage? :shock: It's about a foot long piece of 3/8" hose from the frame rail metal line to the crossmember metal line. Took all of 10 minutes to fix,but those GM pinch clamps are a pain.

Right. Earlier this year my car would bog down on WOT cuz of lack of fuel. Well after a new pump and some ignition stuff found out it was that piece of hose. It was so old it would suck shut under heavy loads.

fb_rider · « **Reply #5 on:** August 20, 2006, 09:13:15 PM »

Since you mentioned that - that's why I replaced mine. I was under the car when it was running and I noticed that the fuel pump was causing that line to collapse on every cylce. I put on a new line and it's better, but still seems to do the same thing. Is that normal or do I have a restriction somewhere?

Eagle 1 · « **Reply #6 on:** August 20, 2006, 09:20:21 PM »

You may have a restriction on your inlet screen inside the fuel tank.

fb_rider · « **Reply #7 on:** August 20, 2006, 11:10:29 PM »

How hard is that to get to?