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Ford F-250 Starter problems

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New User

Sep 3, 2009, 5:32 PM

Post #1 of 3 (2952 views)
Ford F-250 Starter problems Sign In

1991 Ford F-250 5.0L : The starter was just replaced with new one (about one month ago), than the relay went out today - I replaced it with a new one. With the new relay installed, I have started the truck up at least six times, but twice the starter stayed engaged while the engine was running. when I turned off the key, it stayed running. I had to disconnect the battery to stop the engine. The second time it stopped after a few minutes. Does anyone know what is causing this ? Is it the new relay ? Could it be the ignition switch ?

Tom Greenleaf
Ultimate Carjunky / Moderator
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Sep 4, 2009, 1:28 AM

Post #2 of 3 (2946 views)
Re: Ford F-250 Starter problems Sign In

Hmmm? Starter solenoid is somehow staying empowered by a wiring problem at ign or along the way somehow. (is that what you meant by "relay?")

A solenoid can fail and stay stuck ON! If not new I'd toss it with an intermittent issue like this that can be VERY destructive!


(This post was edited by Tom Greenleaf on Sep 4, 2009, 1:35 AM)

Loren Champlain Sr
Veteran / Moderator
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Sep 4, 2009, 10:04 AM

Post #3 of 3 (2941 views)
Re: Ford F-250 Starter problems Sign In

To add to Tom's suggestions;
If the flywheel/flexplate teeth have been damaged, the starter drive can 'hang up', causing it to stay engaged. Very rare, but I've run into a few where the battery voltage was too low to pull the starter drive back. I know. Sounds impossible. But, I've run into it. Unsure
SW Washington

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