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Truck missing when raining

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Old May 28, 2013 | 08:08 PM
  #16  
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Originally Posted by F350-6

If it only does it when it rains, I'd be more suspect of other issues, but since you've come this far, ohm this out and see what you get.
That's kinda where I'm at. Do you have any other ideas that would cause this that are unrelated to the UVCH. Thanks for the help.
 
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Old May 28, 2013 | 08:35 PM
  #17  
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The meter started to give readings that are all over the place and then go back to zero. There are 7 settings under ohms, not sure which one I should be on.
 
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Old May 28, 2013 | 08:55 PM
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Originally Posted by jhand124
The meter started to give readings that are all over the place and then go back to zero. There are 7 settings under ohms, not sure which one I should be on.
Try them all until you start getting a reading that fits. Then test some other pins. The key will be to look for consistency between pin readings.

Originally Posted by jhand124
That's kinda where I'm at. Do you have any other ideas that would cause this that are unrelated to the UVCH. Thanks for the help.
I would start by removing the chip since we already know the connector at the switch has been causing issues.

Also a better description of your symptoms might give us a better idea, but as mentioned earlier, rule out the chip first.
 
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Old May 28, 2013 | 09:52 PM
  #19  
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Alright, finally got some readings on the 200 setting on the meter it also gives a tone to show your connected to the right pin...I thought that was pretty cool.
8 3.7
6 3.7
5 3.7
4 3.5
3 3.6
7 3.9
2 3.6
1 3.8
In the morning I'm going to pull the chip and send it back to DP and let them know what it has been doing and get some updated tunes.

Is there a way I can ohm the GP's from the 42 pin connecter? I still have to figure out why that wire lost its insulation.
 
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Old May 29, 2013 | 10:51 AM
  #20  
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Ohm'd the GP's all checks out there. I found what the range is on one of F350-6 old posts between .1-2.0
DS:
.6, .7, .7, .7
PS:
1.0, .9, .6, .7

Started the truck this morning with the chip in ran fine, it's not raining though.
Started w/o chip ran fine.

I'm at a loss, what electrical that could get wet would cause this?
IDM, PCM (it was bone dry), GEM (I don't know if I have one)
 
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Old May 29, 2013 | 10:56 AM
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Discovered I have a leak into the cab, but it only gets the Passenger floor wet, carpet is wet right now, I'm trying to recreate the leak with a hose with no success yet.
Is there anything on that side of the cab that would cause problems if it got wet? There are electrical connections and a fuse reset up in front of the door.
 
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Old May 29, 2013 | 02:01 PM
  #22  
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Give this a thought

Ford in general has breathing issues in the rain. It's in the way they duct the air intake. I know its apples and oranges on everything else, but consider this please.

I've been driving Crown Victoria PIs for 15 years. Whether 100k miles or 1k, they'll all miss in the rain. Here's what we do: keep an extra air filter on hand. They get wet and instantly kill the air intake. That air intake is right in the front of the passenger wheel. Road splash from that wheel and the car in front of you soaks them quick. If it only happens in the rain, at least give this a thought.
 
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Old May 29, 2013 | 04:19 PM
  #23  
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Thanks for the reply Socks. That's not the issue though, I have an open element filter and that's never been wet. If anything my windshield is leaking or cab lights I haven't quite determined the cause yet.
 
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Old May 29, 2013 | 07:11 PM
  #24  
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The problem with catching an intermittent issue with an ohm test is you have to catch it when it's acting up or hope it shows far enough off to give you a hint.

I'm still not clear on how minor or significant your miss is when it's raining, but if you're planning on sending your chip back in anyway, drive without the chip and see how it does during the next rain so we can at least rule that out or determine the switch connection might have been the issue.
 
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Old May 29, 2013 | 08:39 PM
  #25  
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Stewart hinted at it, but no one has actually asked it. So for the sake of getting it out of the way (because it has been bugging me as I followed this thread);

Have you changed your CPS recently? Have you ever changed it? If so, are you using an aftermarket CPS?
 
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Old May 29, 2013 | 09:31 PM
  #26  
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Wipers and a weak cps will cause a truck to do strange things. Its less than 30 at ford and less than that at riffraff to try it.
 
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Old May 30, 2013 | 12:20 AM
  #27  
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Originally Posted by F350-6
The problem with catching an intermittent issue with an ohm test is you have to catch it when it's acting up or hope it shows far enough off to give you a hint.

I'm still not clear on how minor or significant your miss is when it's raining, but if you're planning on sending your chip back in anyway, drive without the chip and see how it does during the next rain so we can at least rule that out or determine the switch connection might have been the issue.
Chris, thanks for the help I'd rep ya if I could.
I agree with you on the ohm test.

As far as how significant the miss is when it acted up, it was like running on 4, just like UVCH issues, and my pyro would drop, so I figured DS, and I also found the bare wire on GP 8. It had been raining on and off all day today/yesterday and after I put the truck all back together and drove it w/o the chip I haven't had issues...yet. So will see if it occurs again while the chip is out

I found the source of the leak in the cab, I don't think it is significant, it is the door seals. I am going to do the 3/8" tubing Mod.

The switch disconnection thing is really bad when your driving when it happens total loss of everything it just shuts down. It was time to update tunes anyway and switch needed to be cured.
 
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Old May 30, 2013 | 12:28 AM
  #28  
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Originally Posted by A/Ox4
Stewart hinted at it, but no one has actually asked it. So for the sake of getting it out of the way (because it has been bugging me as I followed this thread);

Have you changed your CPS recently? Have you ever changed it? If so, are you using an aftermarket CPS?
Yes more than once (I have had a few CPS failures) I have an International one in there now, and one for a spare. I could see how one might think CPS but when my truck dies all I had to do was look at the F5 switch and if it had no display I'd tap it and it would lite up and I could restart.
 
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Old May 30, 2013 | 12:39 AM
  #29  
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Originally Posted by A/Ox4
Stewart hinted at it, but no one has actually asked it. So for the sake of getting it out of the way (because it has been bugging me as I followed this thread);

Have you changed your CPS recently? Have you ever changed it? If so, are you using an aftermarket CPS?
That's the path I was headed down until he posted he had one full bank down.

Stewart
 
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Old May 30, 2013 | 02:31 AM
  #30  
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Originally Posted by Stewart_H
That's the path I was headed down until he posted he had one full bank down.

Stewart
Right right. Now that you repeat it, I remember that being said. I must have missed it when I skimmed over it again.
 
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