Engine won't crank
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Joined: Dec 2008
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Engine won't crank
So our Ford ambulance 2008 6.4 this morning decided it does not want to turn over at all. 
Checked the Batteries, even tried to jump it just to make sure, nothing. Put into and out of gear just to make sure it was in Park. Still nothing. Any ideas? Everything else seems to be working properly, but there is no power going to the starter, and the crew from yesterday says it started just fine. 
Checked the Batteries, even tried to jump it just to make sure, nothing. Put into and out of gear just to make sure it was in Park. Still nothing. Any ideas? Everything else seems to be working properly, but there is no power going to the starter, and the crew from yesterday says it started just fine.
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Joined: Jan 2008
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From: Washington,KS/Lincoln,NE
I had different one while waiting for the wife the other day. Apparently I'd had the ignition switch in the accessory position long enough waiting for her that some security feature kicked in. I had to turn the switch back to the lock position before it would crank when turned to the start position.
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Checked the Fuses and Relays
I checked both the fuses and the relays. Even swaped relays just to be sure. The whole situation is odd. I even put a battery charger on it for a few hours, still no change. Go figure.
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Problem Diagonosed!
Okay, so we got word from the mechanic today and this information will hopefully be helpful for others of you who have this problem later on down the road. It turns out that a sensor in the exhaust system tripped a code which disables the starter which prevents the truck from being started after it is shut down. Once the code was reset the truck started, but when tested, the sensor showed to be bad. This was one of three (heat?) sensors in the exhaust system, I was told "the rear" sensor. Sorry I did not get the code, but hopefully if this happens to anyone else they will get the info here on FTE! 
Thanks for the suggestions!
Thanks for the suggestions!
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Posting Guru
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So it threw a code but there was no check engine light? Something severe enough to prevent the truck from starting again should at least turn on the CEL (I would hope anyway).
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From: Southern DE
Rear-most EGT looking for overheat on the DPF will do this, to protect the DPF. I would guess not only overheat but also a bad sensor can trigger the same event. Has the ambulance ever displayed a message in the information center stating to pull the vehicle over, or any other warnings? Those would be normal for a DPF overheat, but probably never show up if the senor just cut-out and stopped working.
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There was no check engine light as far as I know to indicate there was a problem before the truck was shut off. I was not there however and would not be surprised if the person who was would have been oblivious if it had thrown a code. Since I never got it to start there was no way to know whether the light was on or not. I guess next time I'll throw my code reader on it and see what the deal is! 
Another thing I was informed of after the fact was the truck was left idling for an extended period of time, but that is not unusual for this truck when it is out on runs.
Another thing I was informed of after the fact was the truck was left idling for an extended period of time, but that is not unusual for this truck when it is out on runs.
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I cant wait until better technology catches up to the EPA demands. Without the EGR and DPF issues these engines would be awesome. To tell a diesel driver that he cant let the truck idle is like telling a baseball catcher he cant wear a glove.
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tjc transport
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Nov 2, 2014 07:42 AM
