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SUVs Jeep Liberty and Jeep Liberty Diesel Jeep Liberty Diesel
10697 messages, Last post on Nov 27, 2009 at 12:02 PM
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I am new to this Jeep diesel experience and have an '06 Liberty with 20000 miles. I have had numerous diesels in the past, and am familiar with diesel quirks. I was getting about 20-21mpg overall and decided to put an edge chip to get some better mileage. I have never chipped a diesel before and was wondering which setting would yield the best mileage. 1st setting is stock hp and torque. 2nd setting adds 15 hp and the 3rd setting adds 25 hp. The manual does not clearly state which settings should be used, except that the 3rd setting should not be used for towing or hot weather. Any help would be appreciated for getting my maximum mileage.
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Replying to: ratsass (Jun 01, 2009 9:09 pm) here is a few suggestions for better mileage.. When on the highway don't drive faster than 65 mph , you will find a lose of 20 % . rather stay in the trucking lane far away from trucks and cars, give your self space, drink a coffee and put some news or music leave 10 minutes early for work and put it in cruise control. the method is drive up to 65 mph then then to 55 mph. you'll notice when you call up your over head display on mileage and reset that there is a "big " difference in mileage after this point. "use the cruise" -Also changing the oil to the recommended 0 W 40 mobile every 7K miles, , when going on a long trip , - fill up on.. recpmmended.."premium fuels", anything that is better than the regular cheapest fuel on the block" for eg... B.P Premium diesel Sonoco "red" Shell "V power" ultra diesel Look for the higher " cetane type diesel fuels". and start using a cetane improver fuel additive like Power service or stanadyne , or maybe even lucas formula for upper cylinder lube. -The next step is pumping your tires to 38 psi , and hoping you have your summer tires on not the monster mudder lugs .. I am also hoping you did the fluid changes on the tranny and differencials as well. Over all you'll notice a "big change in performance " when you do these little things. It worked for me , and now with fresh fuel , I am peaking at 38 mpg Ca. but my baby has 100,000 miles on her. so she is broken in , you may have this until 30,000 miles on yours . but try it . good luck .. Lightnin..
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Replying to: kesh25 (May 30, 2009 2:14 pm) I haven't seen the MAF code, but I wouldn't worry about it. You might try "blowing the nose" and see if the EGR will unstick. It is an expensive fix, I have disabled it to solve the problem, along with intermittent stalls.
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Replying to: lightnin3 (Jun 02, 2009 9:58 am) Just to add some supporting evidence that 38 psi is about right for fuel economy, at 65k miles my OEM tires are not completely worn out yet. Even at 38 psi the edges have worn faster than the centers of the tires. I'm not sure what reasons the manufacturer had for recommending such low tire pressure (What was it, 33 psi? Don't care really.), but it was not for fuel economy or tire life.
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Replying to: siberia (Jun 07, 2009 6:55 am) I just changed my winter tires over to the stock wranglers . It has been 4 yrs now , I have been switching my tires .Having a second set of tires and rims really paid off. It was one of the areas the company cheaped out on . maybe to bring the cost down. Thats' why they give away Liberty's on the lots so cheaply. Rubber costs $$'s. Yea I think , I actually gain about 2 mpg just pumping up my stock tires, compared to the mudder lugs.. They were only to have a 60 K km's range anyway. You know it's funny a lot of people complain about their mileage in the winter monthes.. on here , but when I suggest a few tips , they never reply and say how they made out?.. hmmm. I wonder if they realize ..oh darn !... I have to drive slower to get better mileage and buy decent fuel.... it is only common sense..really. I find the biggest mistake people do is speed . They are always in a hurry everywhere. Here in Windsor and all across Ontario we've had speed traps , so it is an incentive to slow down. I just do the "use the cruise " method and it works both ways.. So watch it, if you plan on coming for the air race in WIndsor ,or fireworks display for the July 4 th weekend, or maybe your planning on going to Toronto for a party, there isn't any allowance for speeding and they really soak you now. Cheers.. Lightnin.. |
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Replying to: mdamick (Jun 05, 2009 9:31 am) I have been regularly "blowing the soot" out of my 2006 Liberty Diesel for the past 2 years. No problem with EGR or turbo boost pressure sensor. I do plan to remove the sensor and clean it this summer. I read in this forum that there is also some sort of filter? I'll check my OEM Service Manual for that.
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Replying to: crash227 (Jun 08, 2009 7:34 pm)  148000 mi.
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Replying to: mdamick (Jun 05, 2009 9:31 am) $200, but did not clear the CEL. Now he wants to pull the EGR and check it. Do you know who could disable the EGR? Do you think the dealer would do it? He wants to pull thaty and check it? If you disable EGR would that impact the performance?or cause stalling?
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Replying to: kesh25 (Jun 10, 2009 1:23 pm) In my case, the EGR caused poor performance and stalling. They will either clean it out or replace it which will work for a while.
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