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

Tiny
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.
Sunday, March 21st, 2010 AT 10:13 AM

3 Replies

Tiny
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
Tiny
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
Tiny
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

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