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Liberty diesel drops RPMs then shudders really badly

4 messages,  Last post on Sep 26, 2009 at 8:20 PM

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#1 of 4 Liberty diesel drops RPMs then shudders really badly by rangermac Aug 20, 2009 (2:42 pm)
3 times in the last 14 days i have been driving my liberty diesel 06 and all of a sudden my rpms drop, i can push down on the gas and the rpms come up very slowly but i don't seem to be able to get going very quickly.   It's like having a manual transmission, going up a steep hill very slowly in 4th gear and giving it gas to try and make it go faster, it just won't do it.   I have an automatic and i have been driving on flat roads each time it happened. After each incident when I slow down to park, the slower i go the more the engine or tranny starts to shudder violently, the only way to make it stop is to turn the car off. When i restart the car a couple of times the violent shudder goes away and then i can drive off normally. Any ideas of what could be the problem? Replies to this message: edlankford (Aug 23, 2009 1:11 pm) johnhayworth (Sep 25, 2009 5:15 pm) mdamick (Sep 26, 2009 8:20 pm)
#2 of 4 Re: Liberty diesel drops RPMs then shudders really badly [rangermac] by edlankford Aug 23, 2009 (1:11 pm)
Replying to: rangermac (Aug 20, 2009 2:42 pm) I had the same problem on my CRD 3>>4 times when is had under 12,000 miles. Once going up a mountain and the rest was 50 mph average. Just lost power. I had to stop, shut down the engine and restart. I never took it to the dealer since all of a sudden it was running fine and has run fine now for 110,500 miles in every condition and Temperature also on 100% biodiesel for many of those miles. Is there any way that the turbo could have cut out ?? Does it have a wastegate to prevent over charging the intake...?? It was running like my old diesel rabbit with no turbo.... Fuel contaminant ?? Hope you find the answer... edlankfordgmail.com Replies to this message: johnhayworth (Sep 25, 2009 5:15 pm)
#3 of 4 Re: Liberty diesel drops RPMs then shudders really badly [edlankford] by johnhayworth Sep 25, 2009 (5:15 pm)
Replying to: edlankford (Aug 23, 2009 1:11 pm) Drop in rpm and shudder are signs of air getting in the fuel line or loose fuel filter. My fuel filter space for a while was loose and trash and bugs filled the gap. when air got in rpm dropped and shuddering started. I found the fuel filter loose and tightened it by hand. Also had an air leek on tube same Results. jdh;-)
#4 of 4 Re: Liberty diesel drops RPMs then shudders really badly [rangermac] by mdamick Sep 26, 2009 (8:20 pm)
Replying to: rangermac (Aug 20, 2009 2:42 pm) It could be the EGR opening up when it is not supposed to. Mine wouldn't shudder so much as just lack of power and then stall. Once the EGR was disabled, it hasn't done it since.   There was also a problem in the 2005 of air getting into the filter through the heater plug on the filter housing ass'y.

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