motor will turn but not crank

[bigcountry]

i got a 99 ford f250 superduty 7.3 the motor will spin over but not crank i have replaced the camshaft position senor any ideas ?

[sea71]

Check the oil level in the high pressure oil pump. Remove the allen plug on the top, and the oil should be within 1 inch of the top. If its leaked down, fill it back up. If its low, it wont start. Thats one possibility.

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Last edited by sea71 : 07-19-2008 at 04:02 PM.

[Marty]

Yup, low oil will keep it from starting.

Any codes?

Batteries need to be perfect. A chip installed???

[bryanbrown]

is the tach moving while it's cranking. Maybe both cps's are bad. Unlikely, but possible

[wingnut]

...try disconnecting the battery for ~10 minutes, hook 'er back up and try it again.

dont ask me why, but my buddy has a 99 that he has to do this to every now and again...and thats with the CPS recall done

[Drepka]

Check the batteries and go ahead and hook some jumper cables up on the thing it may start then. I had the same trouble a couple of days ago, my truck would crank like hell but no start, I could hear a buzzing sound under the hood when i first turned the key on and through the dash. I hooked up some cables and bam the buzzing stopped and it fired right off. I think it was the glow plug relay not getting enuf power.

[bigcountry]

Originally Posted by Maintain

Yup, low oil will keep it from starting.

Any codes?

Batteries need to be perfect. A chip installed???

no codes super chip in stalled

[rankroddin250]

itll spin over but not crank? isnt that kinda the same thing? im assuming you mean spin over/crank over but wont start?

any ways check all of your fuses and make sure none are blown. make sure you have over 11 volts in your batterys while cranking. if not the IDM will not have enought power to fire the injectors. check the high preasure oil resurvour and make sure its full, change the cps if none of the above is wrong. good luck.

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Last edited by rankroddin250 : 07-23-2008 at 03:47 PM.

[outlawdiesel]

hows the fuel pressure.and oil rail pressure? clogged fuel line or o-ring is my guess.

[ford99PSD]

Originally Posted by bigcountry

i got a 99 ford f250 superduty 7.3 the motor will spin over but not crank i have replaced the camshaft position senor any ideas ?

i have seen this somewhere before. in another thread are you sure its not a joke?