No start, tach won't move - Ford Powerstroke Diesel Forum
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  #1  
Old 11-08-2012, 04:12 AM
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No start, tach won't move

Is my PCM gone? Don't know if any of you have kep up with my most recent problem. But I got it posted in this section as well.
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  #2  
Old 11-08-2012, 05:40 AM
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I would try a new cps first
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Old 11-08-2012, 05:41 AM
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Me also

I thought that was "SOP" on a 7.3 LOL
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Old 11-08-2012, 05:59 AM
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have the same problem on my 96 7.3 it cranks but does not start. change the cps and nothing
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Old 11-08-2012, 09:55 AM
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To the OP and the hijacker - are you getting a WTS light?
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Old 11-08-2012, 05:45 PM
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IM getting a wait to start light, replaced CPS going to try it in the morning.
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  #7  
Old 11-09-2012, 07:59 PM
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Finally got enough juice to try to crank the truck. Hooked up mu cheap super chips scanner and got p0344 and p1661. I did just replace the CPS but whose to say the new one isnt bad and my old ones good.

What would trip a 1661 code? The truck has been having a rough idle on a cold start, and I mean rough before it died it would sound like a miss then slowly die on its own. It would take about 20 cranks to get it running again. IF I plugged the truck in over night, I get none of these problems.

Now the trucks sitting dead in my driveway, yet I have it up for sale with people wanting to buy it lol.
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  #8  
Old 11-09-2012, 09:10 PM
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Output Circuit Check is low. Hopefully it's the weak batteries. With the key in the "run" position pull the connector off the MAP sensor. Using a DVOM see if one of the female pins is suppling 5v reference.

-Yes? Reconnect and move to the EBPS and do the same thing.

-No? Check all under hood fuses and test again. Still no? Possible popped PCM.
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Old 11-10-2012, 09:23 AM
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Update on truck, still won't start.

No smoke out exhaust
Tach bounces when cranking
Wait to start light comes on like normal.
Cranks great with good voltage.

Got a buddy with a spare IDM and PCM, but I am leaning towards the IDM since my rpm and everything else is working.
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  #10  
Old 11-10-2012, 03:09 PM
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update, swapped a good idm/pcm into the truck still no start.
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