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Old 04-14-2018, 04:32 PM
Jake Jake is offline
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Default 7.3 crank no start is kicking my butt

Well its been a few months since I have messed with it. But its time to buy a skid steer and I need to fix and sell the truck.

Initial problem, pulling up the driveway with skid steer on trailer, truck bucks sputters...quits.

Cranks, no start.

Tach moving during cranking

I remove chip (old Tony's 4 pos)

still no fire

Get AE running, no codes other than turbo overboost
HPOP 500 psi during cranking, no call for injectors, did notice in AE it is showing cranking RPM 0.

I change CAM sensor still same thing

Truck does have a Swamps HPOP that is probably 3 years old.

Any ideas ? I am almost thinking my CAM sensor harness could be hosed up somewhere. I am going to get back to looking tonight.

THANKS!
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Old 04-14-2018, 06:18 PM
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dsberman94 dsberman94 is offline
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Motor craft cps or other?
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Old 04-14-2018, 06:23 PM
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Quote:
Originally Posted by dsberman94 View Post
Motor craft cps or other?
I thought it was an oreilly BW brand maybe

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Old 04-14-2018, 06:34 PM
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I would look at the harness.

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Old 04-14-2018, 06:39 PM
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Will do, I need to find the schematics to ohm it out. That is the only sensor to send crank speed back correct?

My 7.3 Fu has become weak!

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Old 04-14-2018, 06:44 PM
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Yes.
Basically just ohm the wires between the cps and pcm.

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2003 F250 KR SCSB FX4
Depleted, studded, airdog (which isn't currently hooked up), fass regulated return, airaide, 4 inch straight pipe with mbrp muffler(so on to go), glowchit pyro, fuel, boost, and trans temp. (Of course don't work lol) Hercules terra track A/T2 315/70/17.
2013 Honda pilot Touring
http://badges.fuelly.com/images/sig-us/778639.png
http://badges.fuelly.com/images/sig-us/776628.png
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Old 04-14-2018, 06:45 PM
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What's a good CPS resistance value?

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Old 04-14-2018, 06:59 PM
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See if the CAM sensor will pick up anything. Like a magnetic.
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Old 04-16-2018, 08:19 AM
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Quote:
Originally Posted by Magnum PD View Post
See if the CAM sensor will pick up anything. Like a magnetic.

Ill be working on it some later this week, going to try to get the batteries to come back to life tomorrow night, and ring out the wiring harness.
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Old 04-16-2018, 10:17 AM
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if you have no rpm on the SCANTOOL (tach is irrelevant)...then it's CPS related (sensor, wiring, cam too far from sensor, etc)

..also note the 'only 500psi' for ICP is still borderline...

the PCM should ramp up ICP pressure continuously during a crank no start to 1200+

so you may have more than one issue

Last edited by golfer; 04-16-2018 at 10:20 AM.
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