mhorn0817

Not sure exactly where the smell is comin from because i cant smell. My wife says all over...front, back, inside so im not sure

RB04Av

I had a fuel pump in my truck to leak, where the return line goes into it... got to where gas was pooling up on top of the tank and dripping off, when it was running.

Thank you GM for making that out of material that rusts and can leak fuel by the gallon and is only about tinfoil thick. Right on up there with the brake lines. (which also have rusted through and failed on my truck)

MikeGyver

iTrader: (5)

Let's start a class action lawsuit. GM knowingly endangered us with brake, fuel, and transmission lines guaranteed to fail. I, too had brake lines fail, and my trans cooler lines are about to go. I'd like to see Boeing try to get away with using such inferior materials on a passenger plane.

Anyway, a fuel return line leaking wouldn't cause long crank-to-start times from fuel pressure bleed down.

TurboJohn6

iTrader: (12)

mhorn0817

Its a 04 so the fpr is in tank with the pump. Symptoms point to bad fpr but the smell doesnt. I cant smell so im relying on others to tell me where. And they smell it front and back

MrHorsepowerLSx

iTrader: (13)

mhorn0817

Ok so i put a FP gauge on it to test it. Truck sat for a hour, i turned the key and fp went to 15, off and on again and went to 40, off and on again and went to 55. Let it sit and it dropped to 30 in about 1 minute. Stared the truck and jumped and stayed at 60. Turned it off and dropped to 30 in a minite, 20 in 2 minutes, 10 in 10 minutes.

Also my brother said the smell is strogest under the truck by the tank. I had him cycle the key on and off while i laid under it and as the truck would prime i could hear a whoosh sound like pressure was being let off, not sure if thatd normal or not.

So im guessing ill just have to start with replacing the pump assembly and go from there

mhorn0817

It was the fuel pump assembly. The lines coming off of top of fuel pump assembly was rusted and leaking , causing gas smell and hard to start. Needed to replace plastic lines going to fuel,pump assembly because they were all rusted and broke off

wretched73

iTrader: (1)

Thanks for posting an update!

RB04Av

I had that exact same thing happen to my 04 Av... the top of the pump, where the return line goes back in, and the line itself, rusted through; and gas was literally pooling up on top and dripping off the tank.

Thank you GM for saving $.0037 and using mild steel instead of stainless for that part. About 3 sq in of 26 ga metal. And of course, all the fittings that those plastic hoses hook to was all so rusted up I couldn't get those off, and had to buy a set of those too.

Just like the brake lines on that truck, which also rusted through, and one popped one day while I was pulling a trailer down a busy street. Thank goodness I was able to miss the cars at the traffic light I was coming to and turn into a parking lot. A FULL SET of mild steel lines was $76 or so; a FULL SET of stainless ones was $108 or thereabouts, RETAIL. Thank you GM for saving acoupla more pennies there and risking killing somebody.

Pretty sure I'll be needing to replace the fuel lines before the pressure one pops and sprays the underside of the truck and the rest of the world with gallons of gasoline before I can do anything about it.