Fuel Problem HELP!!!
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Junior User
Joined: Oct 2006
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From: Fairdale,Ky
Fuel Problem HELP!!!
1988 Ford F-250 , 460cu. As I was driving on the x-way my truck acted like it was out of gas. Put gas in and no go. I had it towed home and charged the battery. It will start if I keep my foot on the pedal but runs VERY badly. Had the fuel pump checked and it is fine. Does the same on both tanks. Could it be the Duel Fuel Reservoir plugged up? This is my only vehicle. Just had a new distributor put in and a turn up and it was fine before this. HELP!!!
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Joined: Mar 2016
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Fuel shut off switch
Fords have an emergency fuel shutoff switch on the passenger side under the trim by where your right foot would be. It has a red button on the top and sometimes it can get bumped and will shut of the gas. Just an idea.
Lead Driver
Joined: Aug 2006
Posts: 5,670
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From: Sand Lake, MI
1988 Ford F-250 , 460cu. As I was driving on the x-way my truck acted like it was out of gas. Put gas in and no go. I had it towed home and charged the battery. It will start if I keep my foot on the pedal but runs VERY badly. Had the fuel pump checked and it is fine. Does the same on both tanks. Could it be the Duel Fuel Reservoir plugged up? This is my only vehicle. Just had a new distributor put in and a turn up and it was fine before this. HELP!!!
Does "Had the fuel pump checked and it is fine" mean that you tested the fuel pressure at the rail?
"It will start if I keep my foot on the pedal but runs VERY badly"
First impression sounds like its running just a tad too rich.
Pull the vac line off the fuel pressure regulator, check for evidence of fuel in the vac line/start it and see if fuel leaks from it's vac line port.
If you haven't checked the fuel pressure, it'd be a good place to start unless find obvious problems right off the bat with the FPR.
Running the KOEO self test and retrieving any continuous memory codes would be a good idea along with fuel pressure/system check.
"It will start if I keep my foot on the pedal but runs VERY badly"
First impression sounds like its running just a tad too rich.
Pull the vac line off the fuel pressure regulator, check for evidence of fuel in the vac line/start it and see if fuel leaks from it's vac line port.
If you haven't checked the fuel pressure, it'd be a good place to start unless find obvious problems right off the bat with the FPR.
Running the KOEO self test and retrieving any continuous memory codes would be a good idea along with fuel pressure/system check.
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
Check for any new codes that might lead to cause of the problem?
When running what does the exhaust look like, looks normal very little to no smoke? black or heavy black smoke?
Might want to pull a couple plugs, see what they look like.
Old EGR code, EGR valve stuck in open position?
Wouldn't have stalled it out while holding part throttle and at cruise speed on the highway but might be causing grief now. It opened then stuck there, you let off the throttle for whatever reason slowing down little bit, it failed to close so unable to recover stalling it out.
It'd have to be fully open or close too it.
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Junior User
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From: Fairdale,Ky
It will only run with the pedal all the way down and sound AWFUL. I don't have a code reader and the truck isn't going anywhere.
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Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
One or the other or both allowing it to run.
Put the fuel pressure gauge on it, cycle the key from off to run a couple of times to let it build fuel pressure, if one time gets it 35 to 45psi that's fine but get it to that range.
Then turn off the key while watching the fuel pressure gauge, it should hold within 5psi of spec for 1 minute, however a good working system will hold and for quite a while before dropping much if at all. Point is it shouldn't drop right away and right to zero.
Fuel in the oil?
You can run the self test and pull codes without a reader see,
Ford Fuel Injection » How To Run a Self-Test
Gotta get some idea of what's going on to know what to look too, overly rich condition is still high on the suspect list IMO.
Look at the plugs? if spews black smoke wouldn't need to look at the plugs.
computer/tps/MAP related or all fuel delivery system issue.
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Fleet Owner
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From: Kentucky
There is no Crankshaft Position Sensor per se. The PIP sensor in the distributor is the trigger for spark and fuel injector firing. There is a CM code for erratic PIP signal.
Lead Driver
Joined: Aug 2006
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From: Sand Lake, MI
Ford Fuel Injection » Stator (RPM)
See what your buddy comes up with via his code reader, go from there.
Post any and all codes and include where they originated from. KOEO and then CM in a separate list.
If you get a "system pass" for either or both of those include that information rather than simply stating there where "no codes"
