81 351 spits and sputters but...
81 ford platform for my Shasta Motorhome. I am having problems driving. Starts up find, Will idle for hours if you let it (shop says). But after driving it 2-5 it spits and sputters like there is no ...
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We had a Dodge van with a similar fuel system. Simply a tank and an engine mounted mechanical pump. Had it 21 years, so several fuel pump failures. The trickiest one to figure out was one that went "weak." Didn't leak, didn't quit, just inadequate volume to pull a load.
Driving without towing, OK. Towing the boat, though, it'd so through the first two gears OK then starve in 3rd/high while still accelerating. Replaced and OK.
My theory is that in the lower gears it had the RPM to keep the fuel flowing. When it got to 3rd and the load was still there, the RPM wasn't and it couldn't deliver.
I'd change any filters it has, be sure to check carburetor inlet, and if that doesn't work, put another fuel pump on it. Can't be that difficult or expensive.
Driving without towing, OK. Towing the boat, though, it'd so through the first two gears OK then starve in 3rd/high while still accelerating. Replaced and OK.
My theory is that in the lower gears it had the RPM to keep the fuel flowing. When it got to 3rd and the load was still there, the RPM wasn't and it couldn't deliver.
I'd change any filters it has, be sure to check carburetor inlet, and if that doesn't work, put another fuel pump on it. Can't be that difficult or expensive.
