F250 Fuel System Problem??
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Joined: May 2003
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F250 Fuel System Problem??
We just got back from southern Utah, hauling our camper with my 1994 F250, 4x4, 5.8 gas engine. We had a problem on the trip…. took it in for repair…. but it's still giving us trouble. Here's what happens: We drive the truck up a mountain grade in warm to hot weather conditions. Once we get to the top and are going down the grade the engine stops running. We pull over… let it cool down… then it runs fine. In one case I just switched from the front to the rear fuel tank and the truck kept running… but in the other case with either tank the truck acting like it was starved for gas. After cooling down for about a half hour the truck runs fine. In the repair shop in Blanding Utah they replaced the fuel filter and tested both fuel pumps. They tested within acceptabel limits. Got any ideas about what may be going on?
Post Fiend
Joined: Nov 2002
Posts: 9,987
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From: Memphis, TN
F250 Fuel System Problem??
Pull the codes and check the fuel pressure yourself. A gauge is only ~$25 @ Sears. You have to determine if it dies from lack of a) gasoline, b) air, c) compression, or d) spark. Those are the only possibilities, and you can pretty much eliminate air & compression from the list.
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Joined: Jun 2003
Posts: 4
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F250 Fuel System Problem??
Three things...possibly...
1) Fuel delivery problem. Check the fuel pump relay. Since you mentioned that the problem was temporarly avoided once by switching tanks, it may be an electrical problem. As a reminder, the inertia switch could be intermittant.
2) Ignition module: These things tend to act up before they go bad. Sometimes the stop working after heating up, appear to be OK when cooled down. If the truck has over 100K miles I recomend changing the pickup coil (stator) as well.
3) Last but not least, the worst of all and sometimes the hardest to find. Bad connections. Look for bad grounds by the battery area and dammaged connectors under the chassis that lead to the fuel pumps. Sometimes the battery acid can eat away at the harness.
4) I agree with the reader above. Check the codes. Sometimes the ECM picks up a fault in the fuel pump circuit. not sure what the code is, but you can do a quick search to find out
1) Fuel delivery problem. Check the fuel pump relay. Since you mentioned that the problem was temporarly avoided once by switching tanks, it may be an electrical problem. As a reminder, the inertia switch could be intermittant.
2) Ignition module: These things tend to act up before they go bad. Sometimes the stop working after heating up, appear to be OK when cooled down. If the truck has over 100K miles I recomend changing the pickup coil (stator) as well.
3) Last but not least, the worst of all and sometimes the hardest to find. Bad connections. Look for bad grounds by the battery area and dammaged connectors under the chassis that lead to the fuel pumps. Sometimes the battery acid can eat away at the harness.
4) I agree with the reader above. Check the codes. Sometimes the ECM picks up a fault in the fuel pump circuit. not sure what the code is, but you can do a quick search to find out
F250 Fuel System Problem??
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skychaney
Fuel Injection, Carburetion & Fuel System
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May 29, 2003 12:22 AM
