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Posted on Feb 19, 2011
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My husband has a 1988 Ford F250 that will start but wont stay running. He's replaced the fuel pump, fuel filter, and has had the timing adjusted. What else could it be?

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BILL HAND

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THE THROTTLE BODY AND THE IDLE AIR CONTROL VALVE ARE PRONE TO AN PROBLEM CALLED COKING. THIS REFERS A BUILD UP ON THE THROTTLE PLATES NOT LETTING THEM CLOSE CORRECTLY AND A PROBLEM WITH THE IDLE AIR CONTROL BEING CLOGGED. A LOT OF TIMES A GOOD CLEANING WITH CARB CLEANER AND A SMALL BRUSH HELPS GOOD LUCK BILL

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Bill George
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Which fuel pump did he replace? they have a low pressure pump in the fuel tank to pump fuel to the fuel pump on the driverside frame rail which is the high (55)psi pump. it also could be the iac valve.does it run ruff when it does start?

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  • Master 1,386 Answers
  • Posted on Feb 19, 2011
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Hi and welcome to FixYa!

Any erratic idle problem? If it does then it can be the MAF (mass air flow) sensor or IACV (idle air control valve). If one of these two is faulty the vehicle will have vacuum supply irregularities which may cause stalling. I strongly suggest that you have an engine scan on your nearest auto repair shop to know what needs to be replaced.

Hope this helps and thank you for using FixYa! Have a good one!

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My 1995 ford windstar wont stay running. It died earlier while I was driving (I thought I ran out of gas) and now it wont start. It's acting like there isnt enough gas, or the gas is getting where it...
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Replaced the fuel pump in 1988 ford f250 and the engine still seems to not be getting fuel
follow fuel lines from gas tank to engine are any lines crushed. next replace fuel filter. check to be sure fuel filter is installed in right direction. arrow on fuel filter should point toward engine. double check that fuel lines are connected properly, some fuel pumps have three fuel lines one for pressure , one for return and one vent line.last possible bad fuel pump from factory
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The truck will only run for 30 seconds at a time and sometimes wont even start and sometimes when it does run it will run really rough and have no power. it is deffinately getting spark though
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The fuel pump relay and the oil pressure switch as well. The oil pressure switch runs power to the fuel pump when you first start it
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They are both inexpensive so replace both of these parts to be safe and kill two birds with one stone. If one goes out the other will soon enough
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Mar 27, 2010 • 1988 Ford F 250
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My son ran my truck out of gas. Its a 1988 F250
first, is this a diesel? if it is there is a line or oring loose allowing it to **** air--diesels dont like leaks like that and there is a whole procedure for voiding the air from the lines on diesels. next could be the in tank pump and also does it have duel tanks? does the duel tank switch work? running out of fuel with in tank pumps can burn up the pump (the fuel itself provides lubrication and cooling for the pump, gas or diesel) and of course check the filter, running out and refilling could have disturbed trash in the tank
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Oct 26, 2009 • 1988 Ford F 250
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May 10, 2009 • 2004 Ford F250
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Ford 1988 f250 will not start up.
Pass side inside on the fire wall inside by the heater core just below it. There's a black box with white botton on top. Push the white button downword to reset the fuel pump.

For the fuel filter, you'll find it along the inside fram rail in the driver's side. Just follow the fuel lines.

Good luck oh and not sure if the 1988 F250 are the same as the 86, but if they are what i typed out should help. Happy Easter
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Apr 12, 2009 • 1988 Ford F 250
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Apr 10, 2009 • 1987 Ford F 250
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Feb 18, 2009 • 1993 Ford F250
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Wont idle
sounds like dirty fuel check your fuel filters see if ther blocked
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