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Jeep Liberty Diesel

10706 messages,  Last post on Dec 07, 2009 at 8:40 AM

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What is this discussion about? Jeep Liberty, Biodiesel, Diesel, SUV

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#10553 of 10706 A lumpy engine by fred_blogs Aug 27, 2009 (1:33 pm)
I have a 2002 Cherokee (Liberty) and I have 2 issues with it. Firstly, the engine is lumpy. What I mean by that is that it sounds as if it is running on 3 pistons, performance is OK but has seen better days. Any ideas? It has recently had a set of reconditioned injectors fitted.   The second issue is with the air-con. I have had it re-gassed twice this week but it still doesn't work. That is not strictly true, as it works when I leave the garage but then gives up the ghost the next time I start the engine. Again, any suggestions gratefully received. Replies to this message: mdamick (Aug 30, 2009 4:56 pm)
#10554 of 10706 Re: A lumpy engine [fred_blogs] by mdamick Aug 30, 2009 (4:56 pm)
Replying to: fred_blogs (Aug 27, 2009 1:33 pm) I would check the injector plugs, one might not be tight, or you got a dud.   As to the A/C, you have a pretty good leak. Some dye should be put in to find the source. On mine, the condenser nuts were not quite tight enough and that is where mine leaked, but not as fast as yours.
#10555 of 10706 Re: Liberty Diesel (CRD) 06 [kesh25] by jptech75 Sep 04, 2009 (8:56 pm)
Replying to: kesh25 (May 30, 2009 2:14 pm) P0401 & P0229 could have been triggered by a false Mass Air Flow reading. Test the MAF first. Then verify there are no leaks in the intercooler hoses. Pay special attention to the hose on the Driver's side that attaches to the throttle body. I have seen many rupture near the frame rail. When was the last time the boost/air temp sensor was cleaned?
#10556 of 10706 Thanks by fred_blogs Sep 05, 2009 (8:44 am)
Thanks very much for your replies. I am taking it in to the garage on Monday as I don't have the equipment to check it. I will be cautious about what they say thanks to your posts. Fore warned is fore armed!
#10557 of 10706 Re: Got a new EGR valve today [firemedic44] by jr101 Sep 06, 2009 (10:10 am)
Replying to: firemedic44 (Aug 21, 2009 2:16 pm) Yesterday I just got my 4th egr valve in 8 months..have about 70k on it - 2006, plus I've replace all my globe plugs and I've only had the car 2 years - so somethings not right here. I've had no other problems other that this. Replies to this message: gormanp (Sep 06, 2009 11:04 am) ranrover1 (Sep 07, 2009 4:27 pm) wvav8tor (Sep 06, 2009 6:05 pm)
#10558 of 10706 Re: Got a new EGR valve today [jr101] by gormanp Sep 06, 2009 (11:04 am)
Replying to: jr101 (Sep 06, 2009 10:10 am) Try cleaning your boost pressure sensor- you can do it yourself with simple tools, or ask a mechanic. It gets clogged with soot from the diesel, and this leads to performance problems. Much cheaper than EGRs, etc. Replies to this message: ranrover1 (Sep 07, 2009 4:27 pm)
#10559 of 10706 Re: Got a new EGR valve today [jr101] by wvav8tor Sep 06, 2009 (6:05 pm)
Replying to: jr101 (Sep 06, 2009 10:10 am) Pull the plug on the egr, I did and I have had over 20,000 miles of service free miles. I just returned from the beach where I got over 31 MPG, set the electrionc fuel indicater and did not touch it until I returned home. Also towed a Ford Model A home on a Uhaul car transport trailer from Cooksville Tn. back home to WV, Trailer and car weighed over 4400# and I still got 20.5! Jeep now has 44000 miles and the only thing done was one glow plug...guess I got a good one:-)   Disconnect the EGR and do the EHP and many of the problem will dissappear or at least they did for me.
#10560 of 10706 Re: Got a new EGR valve today [gormanp] by ranrover1 Sep 07, 2009 (4:27 pm)
Replying to: gormanp (Sep 06, 2009 11:04 am) Hi and thank you for any and all help   Where is the location of the boost pressure sensor. I have already cleaned the map sensor which was clogged up but the vehicle still give me a code (P0299). I've also taken out the EGR valve and cleaned that up as well. I still get the same code. The only thing I have not done is the boost pressure sensor because I don't know the location. If you can think of anythig else please let me know. One last thing is there any way to test the electrical part of the EGR valve?
#10561 of 10706 Boost Sensor by jptech75 Sep 07, 2009 (4:45 pm)
It sounds like you may have already found it. The boost/air temp sensor is held in with an Allen headed bolt to the top of the intake manifold, halfway under the injector harness. Replies to this message: ranrover1 (Sep 08, 2009 4:34 am) caribou1 (Sep 08, 2009 6:45 am) jptech75 (Sep 08, 2009 3:57 pm)
#10562 of 10706 Re: Boost Sensor [jptech75] by ranrover1 Sep 08, 2009 (4:34 am)
Replying to: jptech75 (Sep 07, 2009 4:45 pm) Hi jptech75   I read in this forum that what I cleaned was a map sensor. But if you say it's the boost pressure sensor I'll go with that. Can you please tell me what is the filter on the right side fender well small look's like a gas filter for a car.   Again Thank you Replies to this message: caribou1 (Sep 08, 2009 6:45 am) jptech75 (Sep 08, 2009 3:57 pm)

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