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  #1  
Old 03-13-2010, 01:50 PM
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Default Hemi won't idle?

I had my truck idling last night checking all my lights were working properly and all the sudden it died. I have never had any problems what so ever with this truck so I tried to crank it again and it would not crank without the gas pedal to the floor and would die as soon as I let off. I've never had to even give it gas to crank before. I got it to the dealership (limping) but it got there. There is no check engine light on so when they put it on the diagnostic machine it came back no problem. The service manager said well there is a problem because it's still doing it. So they are going old school to figure it out. Has anybody out there ever heard of such a problem or experienced it them self. The service guy said they even checked the star somthing and could find no problem like it ever happening before. PLEASE HELP IF YOU CAN!!!!!!!!
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Old 03-13-2010, 06:58 PM
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just moving you up
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Old 03-14-2010, 10:41 AM
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try cleaning the throttle body with a degreaser and an old tooth brush to get into the small spots, the the truck will have to relearn the idle. I don't know if the truck will relearn idle on its own or it may have to be reprogrammed at the dealer.
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Old 03-14-2010, 02:25 PM
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It's at the dealer now and they have already cleaned the Throttle body. They are supposed to start checking the fuel system tomorrow. It's has me stumped or I would have done all this myself. I hope they get rid of this ghost Monday, I miss my truck so BAD!!!!!!!!
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Old 03-14-2010, 05:58 PM
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Water in your gas?
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Old 03-15-2010, 08:16 PM
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No water in the gas. The dealer and thier top wrench turners seem to think I'm losing compression at the valves. So the heads are coming off and going to the machine shop tomorrow for a full reworking. I hope they haven't just givin up and are shooting in the dark. They checked all electrical, fuel system, you name it the poor SOB thats been on it for 2 days has not made a dime on it so I really hope this takes care of it.
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Old 03-16-2010, 10:15 PM
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Quote:
Originally Posted by 04ram4X4 View Post
No water in the gas. The dealer and thier top wrench turners seem to think I'm losing compression at the valves. So the heads are coming off and going to the machine shop tomorrow for a full reworking. I hope they haven't just givin up and are shooting in the dark. They checked all electrical, fuel system, you name it the poor SOB thats been on it for 2 days has not made a dime on it so I really hope this takes care of it.
That sounds like a big waste of time to me, you need a second opinion from another dealer. First a compression test would determine if you were losing compression definitively, no guess work required. And it would probably be just 1 cylinder and the truck would run pretty decent except for a miss on that one cylinder. You would have to have a catastrphic failure to be losing compression on multiple cylinders, timing chain jump e.g. cam way out of wack and that would probably result in a mechanical failure like piston/valve contact. Also I think any type of compression issue would throw a code due to poor/incomplete combustion.

I think that its not throwing a code of any kind is the big clue, there are so many sensors that monitor combustion and polution. So when you push the pedal to the floor what RPM are you getting? And how is it running, is it smooth but just low RPM or is it missing and running like crap? When it first died did you hear any odd noises or anything mechanical or did it just shut off?

Sounds electronic to me, gas pedal, computer. I can't believe they are pulling the heads.

Last edited by coolidge; 03-16-2010 at 10:29 PM.
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Old 03-16-2010, 10:51 PM
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Quote:
Originally Posted by 04ram4X4 View Post
No water in the gas. The dealer and thier top wrench turners seem to think I'm losing compression at the valves. So the heads are coming off and going to the machine shop tomorrow for a full reworking. I hope they haven't just givin up and are shooting in the dark. They checked all electrical, fuel system, you name it the poor SOB thats been on it for 2 days has not made a dime on it so I really hope this takes care of it.
Sounds like their taking a swing in the dark and with the blind folds on also . Never heard of heads having to come off because it won't idle .
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Old 03-16-2010, 10:58 PM
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I agree it sounds like a waste of time and they did a compression test. Supposedly this fix came down from Chrysler. There was no odd noise when it died it just quit and when I went to start it again it puffed white smoke but I did have it floored when I was cranking it over again so it may have been unspent gas and it was just a little puff, nothing major. I drove through the dealership parking lot today just to see if it was in the shop or out and low and behold it was on the lift with the hood up? We all know you can't pull the heads with it 7 feet in the air so I just hope they fix it at this point I don't care how just get it fixxed. Thanks for the comments and advice I will be going up there tomorrow to raise a little hell.
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Old 03-16-2010, 11:15 PM
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Heads do not 'go bad' / lose compression all at once while the engine is idling.

Timing chain?

Did they have MDS in 04?

If reworking the heads 'fixes' this, I'll be very suprised,,,,
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