Quote:
Originally Posted by Low Elco
Not for nuthin', but did you check your tank venting? Pinched/clogged, clearrrrr into the tank? I've seen 'em before where you're good to go at low speed, but at higher sustained speed (highway) you move enough fuel to vacuum lock the tank and the mech pump cant overcome it. Not just a new hose, I've seen 'em get plugged up inside the sender enough to do it also. Just a thought.
Truck looks great, congrats on the squeak eradication!
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Thanks for the suggestion, but sadly I thought of the same problem. When I first installed the Rock Valley fuel tank back in 1998, they provided a remote mount for the roll over valve/vent. I mounted it as high as possible under the left rear fender and terminated the line with a regular fuel filter mounted under the bed. When the fuel starvation issue began, I pulled the valve just to check for gunk or dirt somewhere in the circuit – and found nothing. But recognizing the valve was designed to be wet (submerged in the gasoline) I pulled the valve out of the remote housing and mounted it directly to the tank bung. The fresh air end was again terminated with a metal disposable fuel filter mounted under the bed.
Unfortunately it made no difference. I have all new line from the tank to the carburetor, and a factory GMC canister fuel filter under the passenger door with a new filter inside. Things like this drive me nuts. When everything is old or questionable the problem could be anywhere, but when everything is new and appears to be in perfect operating condition, intermittent problems like this can be mind boggling!
The upside of the recent change being – I haven’t had a single starvation issue since the mechanical pump was removed. Well, other than the one time I forgot to turn on the electric pump before leaving a parking lot!
