F150 starting problems
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New User
Joined: Jan 2007
Posts: 2
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From: Columbia, SC
F150 starting problems
I have an F150 5.0 liter that is giving my mechanic fits. I suggested posting to this site to see if anyone has some ideas. Thanks for your help! Dave.
It will not start in the mornings after sitting all night. When trying to start it acts like it's getting no fuel, but smells like it is flooding. If I advance the distributor about 5 degrees it will start without hesitation. I can put the distributor back and it will stay running and run good as well as restart.
I have tested fuel pressure, egr, spout circuit, injector noid, coil, module, tp sensor, map sensor, temp sensor, wire connectors, fuel prime circuit, and timing chain.
I have replaced the distributor with cam sensor, computer, and iac valve.
Is there anyone who might have any ideas what may be wrong with this truck?
It will not start in the mornings after sitting all night. When trying to start it acts like it's getting no fuel, but smells like it is flooding. If I advance the distributor about 5 degrees it will start without hesitation. I can put the distributor back and it will stay running and run good as well as restart.
I have tested fuel pressure, egr, spout circuit, injector noid, coil, module, tp sensor, map sensor, temp sensor, wire connectors, fuel prime circuit, and timing chain.
I have replaced the distributor with cam sensor, computer, and iac valve.
Is there anyone who might have any ideas what may be wrong with this truck?
Junior User
Joined: Jan 2007
Posts: 70
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From: Va.Beach
If you were to never adjust the distributor, would it eventually start?
Does it foul the plugs with raw fuel?
It appears to be in the firing control or air to the engine, if not a ground starting to fail on something that controls either.
The best thing to do is troubleshoot the problem without making the adjustment, I would have thought the mechanics would have hooked it up to the computer diagnostics and done the same.
Does it foul the plugs with raw fuel?
It appears to be in the firing control or air to the engine, if not a ground starting to fail on something that controls either.
The best thing to do is troubleshoot the problem without making the adjustment, I would have thought the mechanics would have hooked it up to the computer diagnostics and done the same.
Thread Starter
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New User
Joined: Jan 2007
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From: Columbia, SC
F150 morning starting problems
Thanks for the responses. The answers to your questions:
The timing is set to 10 degrees (factory spec).
The truck will not start without moving the distributor once. After it is started and runs good, it will continue to start all day.
The plugs do not foul with fuel.
Dave.
The timing is set to 10 degrees (factory spec).
The truck will not start without moving the distributor once. After it is started and runs good, it will continue to start all day.
The plugs do not foul with fuel.
Dave.
Junior User
Joined: Jan 2007
Posts: 70
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From: Va.Beach
Does your distributor have a vacuum advance or internal centrifugal advancement? I know the pre 80's had vacuum on there electronic distributor but after that I think they went with the internal centrifugal.
What I'm thinking about is that your distributor is stuck in the advanced mode as if your going down the road at 50+ and not reseting back at idle inside itself. If not it sounds like you may have jumped timing a tooth or need to replace the distributor because of the advancement problem failing inside. Try another distributor from a donor vehicle or buddy.
What I'm thinking about is that your distributor is stuck in the advanced mode as if your going down the road at 50+ and not reseting back at idle inside itself. If not it sounds like you may have jumped timing a tooth or need to replace the distributor because of the advancement problem failing inside. Try another distributor from a donor vehicle or buddy.
Elder User
Joined: Mar 2006
Posts: 590
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From: Venetia, PA
Does your truck start fine for the rest of the day. Mine had the same symptoms wouldnt start in the morning recently but it would start fine the rest of the day. I had cleaned the IAC valve with gum out and fried it. I stole a used one off a totaled truck and put in one. That fixed the problem and the best part is that it only takes about 30 seconds to replace. (2 bolts and 1 plug)
Junior User
Joined: Oct 2006
Posts: 57
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From: Bourbon, Mo.
Might want to check the coil? I had a loose connection one time & it wouldn't start the first time but after jiggeling wires it finally started? It would start & run fine the rest of the day but the next morning, same thing.
