96 7.3 4x4 wont start - Ford Powerstroke Diesel Forum
 
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post #1 of 9 Old 01-12-2012, 11:00 PM Thread Starter
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96 7.3 4x4 wont start

we replaced the batteries drove it around on wednesday, and today it wouldnt start, had it plugged in all day and it wont start.

We truck jumping it with a duramax for and hour still plugged in.

then tried the battery charger on charge and then tried to start it, and set it to start and try to start it, the truck was no longer plugged in and then we set it to start, and it still wouldnt start, though it is 27 degrees f.

we think it could be the cold, but we didnt have any issues the other day

any advice?
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post #2 of 9 Old 01-13-2012, 12:35 AM
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have you checked the cps? is the tach moving while cranking? try and replace the cps its a pretty cheap part anyway, most carry a spare just incase, they do go out often

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post #3 of 9 Old 01-13-2012, 12:14 PM
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Is the Check Engine Light (CEL) illuminated? White smoke out the exhaust when trying to start it? Does the Wait-to-Start (WTS) light come on? If not, check underhood fuse #22. If it is blown, unplug your fuel heater (funky looking spade connector about halfway down the driver's side of the fuel filter bowl), replace the fuse and try again. Cheers!

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post #4 of 9 Old 01-13-2012, 12:36 PM
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does your wait to start light come on? if it doesnt might wanna check fuses under the hood i think they are #20 or 22 30amp fuses mine did that and its has something to do with the fuel bowl heater. soon as i change them it fired up.
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post #5 of 9 Old 01-14-2012, 02:03 PM Thread Starter
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the wait to start light does come on, the battery gauge drops down dramatically whenever i try to start it. the check engine light is not on. im not sure if it white smokes.

we tried again today at 65 degrees and it just turned over weakly.
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post #6 of 9 Old 01-14-2012, 02:09 PM Thread Starter
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sorry this is my first diesel, what is a "CPS"?
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post #7 of 9 Old 01-14-2012, 08:26 PM
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Cam Position Sensor. It's the "heartbeat" of the injection system. If the tach isn't moving when you crank it, that's a good hint that the CPS is bad.

But if it's turning over slow, that's a different issue. If you're sure you've got good batteries and/or boost power from another vehicle or boost starter, then either the battery/ground/starter connections aren't good, or the starter is just tired out.
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post #8 of 9 Old 01-16-2012, 09:10 PM
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try cleaning the large red connection to the starter. look under the passenger side door and you should find it just inside the fram up against the transmission. This worked for me one time and haven't had any starter issues since. Also check the thick black wire coming off of the alternator, mine has gotten messed up a few times.
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post #9 of 9 Old 01-23-2012, 08:09 PM
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I just had a similar issue to cfunderb and tried a few things. It was unusually hard starting on Sat, but it did fire up. Let it warm up for about 20 min since I don't drive it much in the winter. Turned it off and tried cranking again just to see if it would be hard to start. It didn't crank at all. Just a loud click at the starter. I figured the batteries were weak and running it might have drained them too much as if the alternator wasn't working right. Took the alternator in and it tested fine. Went to the starter, took it off and had it tested. Again fine. However, when I reinstalled the starter it started great, probably better than it has in a long time. My thought is there was either a loose connection or corrosion on the starter connections and just taking it off and hooking it back up fixed it.

Chris

1996 F-350 CC LB 4x4
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