slow cranking please help - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 13 (permalink) Old 10-09-2012, 12:58 AM Thread Starter
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slow cranking please help

truck has been crankin real week for last month and a half no matter how warm it is, i could drive it for five hours and shut it off then start it right back up and it sounds like its barely gonna start. but when i check the batteries and charging system with a load tester it says everything is good. any ideas? is it possible my starter is goin bad and takin alot more juice to crank it?
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post #2 of 13 (permalink) Old 10-09-2012, 01:18 AM
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Re: slow cranking please help

Yeah, if it cranks slow, then starter and/or fender relay are the prime suspects. Try jumping the relay with a jumper cable, see if that makes it crank faster.
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post #3 of 13 (permalink) Old 10-09-2012, 01:37 AM
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Re: slow cranking please help

Yes. It is vary common to have the starter to turn slower when they are going bad. What is the amp draw? Check the connection's at the starter and look at the cable. The connection at the starter on the cable can have corrosion going up the cable. You need a certain cranking rpm on diesel's for good starts. Good luck.

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post #4 of 13 (permalink) Old 10-09-2012, 03:15 AM
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Re: slow cranking please help

If it is the starter, which it more than likely is, upgrade to an 03' 7.3 starter...it cranks way faster, its a 2 bolt mount and you will need to bore out a wire connection though
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post #5 of 13 (permalink) Old 10-09-2012, 03:26 AM
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Re: slow cranking please help

Quote:
Originally Posted by madpogue View Post
Yeah, if it cranks slow, then starter and/or fender relay are the prime suspects. Try jumping the relay with a jumper cable, see if that makes it crank faster.
The fender relay is only a control signal relay for the starter solenoid. The actual solenoid for the starter is on the starter and gets its feed directly from the battery and I doubt that you could get any jumper cables on it.

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post #6 of 13 (permalink) Old 10-09-2012, 05:49 AM
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Re: slow cranking please help

What zkurtz said,

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post #7 of 13 (permalink) Old 10-10-2012, 12:28 AM
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Re: slow cranking please help

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Originally Posted by Bugman View Post
The fender relay is only a control signal relay for the starter solenoid. The actual solenoid for the starter is on the starter and gets its feed directly from the battery and I doubt that you could get any jumper cables on it.
Ahh, good point; a weak relay would cause a weak signal to the solenoid, which might cause the solenoid to fail to engage, or to "buzz", but indeed, it wouldn't cause the starter motor itself to turn slower.
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post #8 of 13 (permalink) Old 10-10-2012, 02:31 AM Thread Starter
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Re: slow cranking please help

Thanks for all the input guess I'll throw a starter on it and see what that does
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post #9 of 13 (permalink) Old 10-10-2012, 03:33 AM
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Re: slow cranking please help

Did you test the batteries separately?

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post #10 of 13 (permalink) Old 10-10-2012, 06:52 AM
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Re: slow cranking please help

Starter! Just had this issue. Had both batteries load tested separate like brad said and they were both good. One time it started to crank then froze up, one swift swing of a 2x4 and it fired back up. Replaced with DP starter and cranks amazing. The easiest starter I had ever changed!! 20min

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