Help truck dead in water

[73idi88f350]

Another thing to consider is the lobe that drives the mechanical pump. On my truck it was no longer actuating the lever enough to drive enough fuel to the injector pump. I guess it wore down somehow.

I replaced my mechanical lift pump with an electric transfer pump and I have been a happy camper in that area ever since (about 2 1/2 years).

As a troubleshooting step, try bypassing the mechanical pump with an electric one if you can. Low pressure pumps are usually about $50 up here in Canada so probably closer to 25$ for you.

Hope this helps!

is a gas one the same? im thinking of just changing to a good diesel pump but dont know what kind or how much they run.. electric seems to be the best idea/upgrade.

 

[MIDNIGHT RIDER]

A couple of fuel-pressure gauges will save a lot of guess-work and frustrations when having such troubles.

One gauge plumbed each side of the main fuel-filter will tell the whole story.

So far as the lobe wearing off the cam, the way I see it, the entire cam-shaft is heat-treated/hardened as a unit; if it is possible for the fuel-pump actuating lobe to wear out, then would not the rest of the lobes be worn likewise, thus creating a lack of valve-train performance ??

 

[MIDNIGHT RIDER]

is a gas one the same? im thinking of just changing to a good diesel pump but dont know what kind or how much they run.. electric seems to be the best idea/upgrade.

If buying one of those wimpy diaphragm electric pumps, then there is a difference between gasoline or diesel; the diesel will eat the diaphragm of the gasoline pump.

A genuine steel rotary vane pump couldn't care less whether it is pumping gasoline or diesel.

Some like the Holley "RED" and it's re-labeled variants.

Myself, I very much prefer the CARTERs.


As a main fuel lift-pump, no electric is going to be as good as a mechanical piston lift-pump; however, a working electric rotary vane pump is going to be better than a dead mechanical diaphragm pump.


Whatever pump you choose, REMOVE it's internal screen and install an easily accessible inline filter ahead of the pump, even if it means routing several more feet of rubber line; you want that see-thru filter up high-and-dry where you can access it easily with your Sunday-go-to-meetin' clothes on.

Failure to heed this wisdom will come to haunt you some cold dark night.

If you leave the screen intact, some dark rainy night, in the most inopportune place, at the most inopportune time, that screen is going to plug with **** and shut you down.

In the panic of having 10,000-pounds of truck shut-down in the middle of the road, you will never think of that screen and resort to an expensive wrecker bill; all of which can be avoided by using a simple see-thru inline filter instead.

 

[73idi88f350]

ok i been out side trying to get it stay running for like 2 hours so i decided to drop the front tank...


i keep getting air at the valve on the fuel filter head so i figured ether im out of fuel or my show head fell off.. wll it seems to have a 1/2 tank of fuel so i knocked 1 thing down.

so i decided to pull the sending unit and this is what i found.. i wonder if this is causing me to get air.. im getting fuel but very airy fuel at the filter

so im gonna remove the shower head and add hose but i hope thats gonna be the winner

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[73idi88f350]

well once i did that i had no fuel at all, so i moved to the selector valve i looped the rear feed and return line and started cranking.. and wa la i had good fuel.. couple more cranks shot of ether and it runs on its own.. so i still gotta reinstall the front fuel tank. but its running and fires on first touch of the key which it hasn't done in a while.

but im sure the pic of the shower head is why i only got down to a 1/4 tank before having issues

 

[IDIBRONCO]

The fuel pump eccentric on the cam is not part of the cam and is replaceable. I've seen some that had a big groove wore into them but most seemed to have just a little wear.

 

[73idi88f350]

well for anyone that use's this down the road so far so good seems to be the fuel seletor valve i had to disconnect the rear tank and hooped the in and out of it with a piece of hose.. the rear tank has a hole and loose its fuel so that explains it.

 

[73idi88f350]

(knocking on wood) so far so good must been the fuel selector