2000 Ford F-250 Will not start; starter engages and clunks

DSSRANGER

MEMBER
2000 FORD F-250
V12
2WD
AUTOMATIC
120,000 MILES

2000 F250 10 Cyl. Will not crank, starter begins to engage and then clunks, I have had the starter tested and the battery as well. I removed the wiring harness from the neutral safety switch, nothing happens when removed, the above occurs when the harness is attached in park and neutral. I have not attempted to jump any pins yet. I have no codes given for any engine failures, Could the engine has seized up? I have not started it for a couple of weeks, I do not live in below freezing conditions though.

3 Replies

MERLIN2021

MECHANIC
17,250 POSTS

Remove the starter, and rotate the flywheel look for broken or missing teeth. Does the starter work normally out of the car? See if you can turn the engine by hand, removal of the spark plugs will help. Checked the oil?

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Sunday, March 21st, 2010 AT 10:49 AM

DSSRANGER

MEMBER
2 POSTS

When I removed the starter I felt around the flywheel in that area, nothing felt odd. I checked the dipstick the oil looked fine. I was going to try and rotate the engine manually, but I thought it might be the transmission range/neutral switch or may a camshaft/crankshaft sensor. My only concern in the back of my mind is that I left it unlocked and if it possible to pour something in the engine to cause it to seize, but I thought it would have to run to chemically seize the engine. I took the starter in and had it benched tested, it worked fine. I guess I should try and manually turn the engine and then look at the sensors.

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Sunday, March 21st, 2010 AT 3:03 PM

MERLIN2021

MECHANIC
17,250 POSTS

Remove all plugs, see if you can get a socket on the crank, and turn it clockwise. If it spins, your problem isn't mechanical, it's electrical, I did want you to turn the engine and inspect all teeth on the flywheel, and look also for any cracks. Once these things are eliminated, we can work the electric.

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Sunday, March 21st, 2010 AT 5:07 PM