f350 idle/fuel problem
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f350 idle/fuel problem
1994 f350 dual tanks 460 c.i.
Truck runs fine but dies at idle (blubbers at idle) if I am idling on rear tank and switch to front, truck will blubber (IDLE) worse and die.
Truck seams to run better on rear tank and idles better in drive, or reverse. Drives down the road fine. Cold start at 10 degrees farenheight is perfect, pops right off and goes to fast idle but will then slowly decrease until it idles very rough and might die.
When driving on the road ( 55 mph) on rear tank, truck will run fine. Switch to front tank (55mph) loses some power.
any help will be appreciated.
Doug
Truck runs fine but dies at idle (blubbers at idle) if I am idling on rear tank and switch to front, truck will blubber (IDLE) worse and die.
Truck seams to run better on rear tank and idles better in drive, or reverse. Drives down the road fine. Cold start at 10 degrees farenheight is perfect, pops right off and goes to fast idle but will then slowly decrease until it idles very rough and might die.
When driving on the road ( 55 mph) on rear tank, truck will run fine. Switch to front tank (55mph) loses some power.
any help will be appreciated.
Doug
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Joined: Jun 2014
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From: Oakhust NJ Jersey Shore
I'm thinking the pump in the tank is shot or the sock is clogged and or fuel contaminated. the main pump on the frame works fine, the rear tank is ok, it seams the front tank has an issue, when you check it out changed the fuel filter to. quick test is to install a fuel pressure tester in the port on the fuel rail. Run it and swap tanks see if you loose pressure if not, must have some crap in the tank.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
1990 was the first year with the high pressure in-tank pumps for gas powered F-series trucks.
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idle /tank problems
I think I am going to check fuel pressure and also change fuel filter (i have never changed it) if that does not work I will change IAC. remember this is pre obd2 and is not triggering a check engine light.
I will keep you updated may be a few days it is cold here in MInnesota
Doug
I will keep you updated may be a few days it is cold here in MInnesota
Doug
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From: SoCal 909
IAC is only for keeping an idle. That wouldn't have anything to do with a bog, especially at highways speeds or light throttle applied.
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Fleet Owner
Joined: Oct 2005
Posts: 20,786
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From: Kentucky
I think I am going to check fuel pressure and also change fuel filter (i have never changed it) if that does not work I will change IAC. remember this is pre obd2 and is not triggering a check engine light.
I will keep you updated may be a few days it is cold here in MInnesota
Doug
I will keep you updated may be a few days it is cold here in MInnesota
Doug
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