91 f150 4.9 engine will crank if primed thru breather and crank after unless it sits for hr or so then gotta be reprimed to crank....any ideas as to why?

Asked by misinterpetation Oct 22, 2013 at 07:15 AM about the 1991 Ford F-150 S SB

Question type: Maintenance & Repair

fuel pump works fine pressure test is ok just won't crank after sitting for hr or so once primed it cranks fine til next time it sits

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OJ answered 11 years ago

When you say "crank" you mean it will not start, but will turn over, right?

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misinterpetation answered 11 years ago

it will turn over it cranks and runs great after priming and keeps cranking unless it sits for period of time

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91 f150 4.9 engine will crank if primed thru breather and crank after unless it sits for hr or so then gotta be reprimed to crank....any ideas as to why? 2 Answers

fuel pump works fine pressure test is ok just won't crank after sitting for hr or so once primed it cranks fine til next time it sits

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91 f150 4.9 engine will crank if primed thru breather and crank after unless it sits for hr or so then gotta be reprimed to crank....any ideas as to why?

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91 f150 4.9 engine will crank if primed thru breather and crank after unless it sits for hr or so then gotta be reprimed to crank....any ideas as to why?

2 Answers

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