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  #1  
Old 02-10-2008
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Dieing then starts up problem while driving

I originally thought it was a tranny problem but its not...

My truck 2004, 4.0L 4x4, Auto

WHat happends: When driving down the road my truck seems like it dies then starts up and jerks really hard. Almost like slipping the clutch without letting off the gas and dumping it while going 60 MPH.

Example of what happends. I will be driving down the road lets say at 2,500 RPMs. Then all of a sudden my RPMs will drop 200 (2,300 RPMs) then jump back to 2,500 RPMs and jerk hard. This all happends within a second.

It seems to only happen when I am diring on wet road. last week I noticed it happends worse in the snow. It was snowing super hard and my truck started to do it. Then I got behind a semi throwing up a bunch more snow and it did it ever 20 secs. After I passed the semi it stopped and onyl did it ever 2 mins or so. Once the snow stopped the jerking stopped.

Any ideas
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Old 02-10-2008
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IAC? idk for sure but we could try to clean it...
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Old 02-10-2008
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I could try that. I was going to clean some connections today but too cold.


BTW I have a billet T rex grill, maybe that is letting more crap in?
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Old 02-10-2008
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i cant see that being it...
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Old 02-10-2008
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I thought about next time it snows putting a piece of rubber behind the grill on the way home. If it dosen't do it then I know that is where its coming in from and can look for areas that get wet.
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Old 02-10-2008
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worth a try i suppose. when it starts acting up pop the hood and see whats wet...

you still have not replaced the plugs and wire right? you need to do that...

fuel filter too...
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Old 02-10-2008
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I haven't done none of that. I was waiting for the warmth
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Old 02-11-2008
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getting water on spark plug wires can cause this issue you are having...
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Old 02-11-2008
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Chech the big connector below the driver's seat ? I believe the fuel pump power passes through it.
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Old 02-11-2008
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Didn't you have this same problem Zach? I thought you said you replaced the Throttle Position Sensor and it never came back...?

If i am remembering correctly..
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Old 02-11-2008
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I think his issue is different. right now he has too many variables imo. He needs to take care of some maintenance issues then see if it goes away. Josh if you want to this Saturday I can take a look at it, if its freezing we will put it in the shop up front then replace some of that stuff that needs done.
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Old 02-11-2008
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I may we will see.

The reason I do not think it is spark plugs or anything is because 1. you don't have to replace them till 100k miles. 2 because it only does it when wet and it never cuts out. just shuts down.

Unless 1 is cracked but then I would think it would just miss. Not just off then on
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Old 02-11-2008
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understandable... idk that is just where i would start.
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