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  #1  
Old 01-31-2018, 07:47 AM
vipertblck vipertblck is offline
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Join Date: Mar 2017
Posts: 20
Default prolonged crank

just started recently, truck SOMETIMES, intermittently, has prolonged crank. usually 2 cranks or so and it fires. the few times it's done it maybe double that, total of 3-4 seconds cranking time. one of those things it's not terrible, but I know my truck and what's normal for it. no CEL. sometimes idle has been "rough", by that I mean it fluctuates based on what I can hear. idle is sometimes just above 500, sometimes about 1000. truck has front timing cover done in November 2017 and ever since that the high idle presented itself, maybe due to colder temps too, not sure?!

did some reading and surfaced some stuff about ECT and IAC tied together and possibly cause prolonged start. there's 2 ECT sensors I saw, one on top of the manifold basically, and the other slightly below it further down the front of the engine. any way to test the ECT sensors, or IAC? I have a scanner I could get in and check things, but where would you guys suggest starting with this?

again truck has always started, prolonged start (3-4 seconds crank) is intermittent, no CEL.
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  #2  
Old 01-31-2018, 10:05 AM
Rath Empire Rath Empire is offline
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Posts: 266
Default Re: prolonged crank

Could be a clogged fuel filter. Cheap and easy to replace and good maintenance, try that and see what happens. Should do it every now and then anyways.
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Old 01-31-2018, 10:25 AM
vipertblck vipertblck is offline
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Default Re: prolonged crank

Quote:
Originally Posted by Rath Empire View Post
Could be a clogged fuel filter. Cheap and easy to replace and good maintenance, try that and see what happens. Should do it every now and then anyways.
new ford filter in july 2017, less than 5000 miles ago
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  #4  
Old 01-31-2018, 04:01 PM
Undrstm8ed Undrstm8ed is offline
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Default Re: prolonged crank

Auto or manual?

Could be at the starter engagement into the flywheel getting hung up.. randomly. The starter solenoid that controls that could be going bad? Hard to say or guess too much as an intermittent issue let alone not being able to put your eyes and hands on it directly too.
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