crankshaft position sensor, slow crank? - Ford Powerstroke Diesel Forum
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post #1 of 38 Old 01-14-2013, 03:54 AM Thread Starter
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crankshaft position sensor, slow crank?

Will an unplugged or bad crankshaft position sensor cause a slow crank?

I put my truck back together after studs, injectors, etc and it cranks VERY slow. The batts are good, the starter is 1 month old.

The only thing I know that's not right is the clip is broken on the crankshaft sensor and the plug will not stay on. I am wondering if this is causing a slow crank.

2005 F-350 CC LB 4x4 XL 6.0
SCT
4" Turbo back exhaust
03 turbo
Studs
Coolant Filter
Warren Stock+ injectors

1996 F-250 ECLB 4x4 XLT 7.3 Auto



1993 F350 CCLB 4x4 5spd 7.3 NA
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post #2 of 38 Old 01-14-2013, 04:54 PM Thread Starter
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Checked starter, it's good.
Removed all glow plugs, still cranks slow, not hydrolocked.
Zip-tied crank position sensor plug (for now).
Digital battery charger says both batts are 100%.

What am I missing? Grounding issue?

2005 F-350 CC LB 4x4 XL 6.0
SCT
4" Turbo back exhaust
03 turbo
Studs
Coolant Filter
Warren Stock+ injectors

1996 F-250 ECLB 4x4 XLT 7.3 Auto



1993 F350 CCLB 4x4 5spd 7.3 NA
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post #3 of 38 Old 01-14-2013, 05:09 PM
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Digital battery charger is not a load tester, get your batteries load tested.

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

SEE MY OIL COOLER REPLACEMENT AND EGR DELETE -
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post #4 of 38 Old 01-14-2013, 05:32 PM Thread Starter
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Quote:
Originally Posted by southend View Post
Digital battery charger is not a load tester, get your batteries load tested.

Sent from my phone that somebody didn't help me get.
1st on the list tomorrow.

2005 F-350 CC LB 4x4 XL 6.0
SCT
4" Turbo back exhaust
03 turbo
Studs
Coolant Filter
Warren Stock+ injectors

1996 F-250 ECLB 4x4 XLT 7.3 Auto



1993 F350 CCLB 4x4 5spd 7.3 NA

Last edited by willholl79; 01-14-2013 at 05:34 PM. Reason: sp
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post #5 of 38 Old 01-14-2013, 05:54 PM
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With the plugs out it should zing over pretty quick. I'll bet the batteries are weak/bad.

Was it a Ford starter or a parts store piece?

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post #6 of 38 Old 01-14-2013, 06:03 PM Thread Starter
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Quote:
Originally Posted by sargar View Post
With the plugs out it should zing over pretty quick. I'll bet the batteries are weak/bad.

Was it a Ford starter or a parts store piece?

Sent from my DROID X2 using AutoGuide.Com Free App
The starter is a Napa reman, about a month since installed. Took it off today and had it load tested, good.

Gonna have the batts load tested tomorrow.

2005 F-350 CC LB 4x4 XL 6.0
SCT
4" Turbo back exhaust
03 turbo
Studs
Coolant Filter
Warren Stock+ injectors

1996 F-250 ECLB 4x4 XLT 7.3 Auto



1993 F350 CCLB 4x4 5spd 7.3 NA

Last edited by willholl79; 01-14-2013 at 06:10 PM.
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post #7 of 38 Old 01-14-2013, 06:07 PM
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Originally Posted by willholl79 View Post
Took it off today and had it load toasted, good..
So the starter is toast...that'd do it. Hehe

The batteries will take care of it I bet.

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post #8 of 38 Old 01-14-2013, 06:10 PM Thread Starter
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Quote:
Originally Posted by sargar View Post
So the starter is toast...that'd do it. Hehe

The batteries will take care of it I bet.

Sent from my DROID X2 using AutoGuide.Com Free App
Lol, tested not toasted.

2005 F-350 CC LB 4x4 XL 6.0
SCT
4" Turbo back exhaust
03 turbo
Studs
Coolant Filter
Warren Stock+ injectors

1996 F-250 ECLB 4x4 XLT 7.3 Auto



1993 F350 CCLB 4x4 5spd 7.3 NA
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post #9 of 38 Old 01-15-2013, 07:00 AM Thread Starter
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Tested batteries, one was bad, replaced it. Still cranks slow.
Removed, cleaned, reconnect all ground on engine. Still cranks slow.

Gonna check voltage at starter. Maybe a bad wire.

Any other ideas?

2005 F-350 CC LB 4x4 XL 6.0
SCT
4" Turbo back exhaust
03 turbo
Studs
Coolant Filter
Warren Stock+ injectors

1996 F-250 ECLB 4x4 XLT 7.3 Auto



1993 F350 CCLB 4x4 5spd 7.3 NA
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post #10 of 38 Old 01-15-2013, 07:39 AM
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Other than what you said you was going to check, Batteries should always be replaced in pairs, the "old" one will eventually wear the new one down. A bad starter will "drag" a motor down.

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

SEE MY OIL COOLER REPLACEMENT AND EGR DELETE -
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