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Old Sep 14, 2021 | 10:50 AM
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I have a 1991-f-350-5.8 liter,I removed all of the emission bull **** including pump.My problem is the belt that I downsized to fit keeps jumping 1 rib on the belt at the crankshaft pulley.any suggestions?
 
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Old Sep 14, 2021 | 06:26 PM
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If the belt is 'jumping' you have something not lined up. Is the water pump pulley on correctly, and in good condition?

Read the following for smog delete and belt sizes:
- https://www.ford-trucks.com/forums/1...belt-size.html
- https://www.ford-trucks.com/forums/1...i-need-it.html
- https://www.ford-trucks.com/forums/1...og-delete.html
- https://www.ford-trucks.com/forums/1...og-delete.html

 
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