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1995 Ford f250 idles fine put it in gears and sputters and

Customer Question
dies JA: How many miles are...
1995 Ford f250 idles fine put it in gears and sputters and dies
JA: How many miles are on the car? What size is the engine?
Customer: not many miles its a farm truck 7.5L less than 100,000
JA: Are you fixing your F250 yourself? What have you tried so far?
Customer: its my brothers. yes
JA: Anything else you want the mechanic to know before I connect you?
Customer: it sat for a long time
Submitted: 3 months ago.Category: Ford
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Answered in 17 minutes by:
9/8/2017
Ford Mechanic: Matt, Engineer replied 3 months ago
Matt
Matt, Engineer
Category: Ford
Satisfied Customers: 22,251
Experience: BEng hons Mech engineering, in auto industry 22 years
Verified

Hello

This sounds like a lack of fuel and could be a lack of fuel pressure from the electrical pump at the tank.
1st thing to try is to remove the fuel filler cap and then flick the ignition on whilst listening for the brief ‘buzz’ of the pump

If the connections to the pump are corroded or damaged then the pump could stop at any time or could not be running at full speed. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubt and do the same for the fuse,
Ideally measure the pressure at the injector rail (should usually be around 3Bar / 45psi +) and if this is low check the pump as described and also consider changing the fuel filter as if this partially blocked this too will reduce pressure.

You can also get this issue with contaminated fuel , if there’s water or dirt in the tank then either the petrol floats on top of the water or the filter sock on the pump is choked up – so if the other things check out then I’d consider pulling out the fuel pump and cleaning the filter sock

And one other thing to try is to loosen off the fuel filler cap, as there’s a 1 way valve built into the cap to let air into the tank and so prevent a vacuum from being created as the fuel leaves the tank to the engine
If this helps then replace the cap with a new item

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Matt
Matt, Engineer
Category: Ford
Satisfied Customers: 22,251
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