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SUVs Jeep Liberty and Jeep Liberty Diesel Jeep Liberty CRD Diesel Real World MPG
148 messages, Last post on Jun 27, 2009 at 4:36 PM
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Replying to: caribou1 (Apr 01, 2008 3:57 am) I read a few posts on the EGR valve could this be some of the problem? If the EGR valve is bad will this show up on the computer? Do you know if putting a SEGR kit in will this void the warrenty and will this help MPG? What is there anything else I can do? Thanks again, Ramon
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Replying to: ramon1460 (Apr 01, 2008 2:19 pm) I believe the SEGR kit should give you a better truck for the following: - automatic shifting without hesitation, - less nerve irritation due to visual pollution (black smoke), - improved mileage in city traffic, - fewer conflicts with dealers (they will call you). On the other hand, if you remain in 5th gear at the lowest achievable speed, you need to be aware of the risk of having premature wear of the torque converter. With my engine, mileage is strongly dependent on temperature. I recorded all weather and traffic conditions during the first year I had it. All figures apply after five years but with a greater tendency to doubt on even fuel quality  By the way, we have no substitution fuel yet. Perhaps oat, sweat and manure will reappear making unique photographic opportunities 
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what cause the bucking in my crd is it the egr valve?
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Replying to: hogwild1961 (Apr 24, 2008 1:15 pm) |
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I've watched this thread for more than a year, ever since I considered getting a Liberty CRD. I took the plunge last spring and have had my Jeep almost 11 months. I bought my Jeep used from the president of the leading Straight Veggie Oil conversion outfit here in the states, already converted to run on straight vegetable oil, and couldn't be happier. Obviously the jeep is not stock, there have been major modifications made to the fuel system and to other systems. My jeep has a custom built 15/5 gallon split tank replacing the stock, (5 for startup and shutdown diesel and 15 for vegetable oil). The system is equipped with a heating system which keep the fuel at around 160-170 degrees farenheit. The vehicle is equipped with a Tuner (specifically setup to match well with the burning characteristics of vegetable oil) as well as aftermarket reusable air filter and exhaust. I have driven with and without the tuner and have noticed a big difference, Stock the vehicle tends to smoke at idle and also when I ask for a lot from it in a hurry, such as panic situations on the freeway (plume of black smoke), stock my highway mileage was 29-30 and city fell to 22, Yikes!! With the programer on I get a few extra mpg as well as a HP boost up to 185 and considerably more torq and no smoking. I went ahead and had the dealer do the F37 or whatever upgrade that was, I took off the tuner before I went in, OH MY GOD, I couldn't wait to get home and plug it back in, the upgrade made the car positively anemic, plugging the tuner back in fixed that though. Soooo... When I first bought the vehicle I wasn't set up for collecting and filtering waste vegetable oil and I probably spent the first 5 months of ownership running on regular dino diesel in both tanks. (Exxon, Shell) What I found to be interesting was that I got significantly better mileage running on the heated tank, (with regular dino diesel as well as waste vegetable oil). My real world averages run about 26 in stop and go urban and between 30-35 on the highway, almost never above 65 mph. The highest I've seen recorded on my liberty was 36.2 and that was when my mom drove it 450 miles for me on a moving trip, (It was her first time driving it too, she didn't want to give it back and tried to trade me for the Ford F-250 Powerstroke Diesel I had just bought for her) As far as driving style, well, I am as mpg conscious as one can get, my first three vehicles were GM Suburban, GM Jimmy, Chevy Tahoe, 88, 83, 96 respectively. I almost never got better than 13 mpg on any of them and when you are young and cash is scarce eeking out as many miles per gallon is a priority. I have had few problems with the vehicle, I had to get towed (own stupidity) for driving the very twisty turny roads of Napa County with less than 1/4 of a tank of fuel, sucked up air and air locked it in a single lane going uphill with traffic coming from both directions, totally panicked and forgot about re-priming it. The dealership had no clue what was wrong, they didn't sell the CRD in California so they had never worked on one before, it finally occured to me what had happened and I went up and primed the system and it started right up. I did have all the recalls done, when they went to replace the torque converter it was fused in the transmission and they had to replace the whole tranny. All in All I think the modifcations are probably to blame for my higher than average mpg. My trip computer registers the mileage very accurately, within .1 mpg (accounting for 3 mph discrepancy between the speedo and several gps readings). Also, the vehicle really performs better running on veggie oil than it does on Veggie, not sure why exactly, but my Ford F250 is the same way, loves Veggie way more than Dino. I've never run Biodiesel in either and don't intend to, not a fan in any way shape or form. Any product that can degrease my kitchen stove so well should not be going into my vehicle IMHO, and methanol and lye (in any quantity) are not something I like having in my fuel tank. My Jeep spent its first 8 months in my stewardship in N. California, nice and warm, now that I am back in my native Alaska I have noticed a small drop in mileage, maybe not due to the cold though, our speed limit on our highways is 50 mph and our state troopers and forest service cops are serious about it. Seems very difficult to get my jeep into 5th, probably not healthy for the torque converter anyway when I am dropping down to 45mph around corners. All in All I don't feel like I could find anything better than the Liberty CRD that satisfies my MPG requirments along with my 4x4 cold weather Alaskan enviorment necessities. On a separate and unrealated note... Does anyone know if the CRD are still being sold overseas? I just got back from Ireland and England and saw Liberty CRDs (labeled as Cherokees) absolutely everywhere. Would be good to know as far as part availability is concerned. |
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I own an '06 Liberty CRD with 50k miles on it. I have had it in for the recalls for ball joints and blower motor, but I have never had problems with the EGR. I've read about this problem being so common that I want to know how to recognize it when it happens. I read a post about the PCM needing to be replaced when the EGR is replaced. I plan to buy the Jeep Service Manual for my Liberty soon, but can someone tell me how to determine that the EGR has gone bad? I've had some unexplained engine malfunctions that result in a loss of power like when traction control takes over the engine speed except the engine runs roughly. It has only happened two times and each time it cleared up after shutting the engine off and restarting.
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Hey crash, Since my last post I ran into another forum dedicated to the diesel liberties. There is a fix for these EGR problems, read about it here. http://www.lostkjs.com/forum/phpBB2/viewtopic.php?t=23033 I bought one of the kits and am in the process of putting it together, but from what I have read this is a total fix. Best |
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My 06 CRD has done exactly the same thing, twice in the last 4 months. I'm going to the dealer tomorrow to see if they can diagnose, but it sounds like EGR...  Off to the LOST KJs site!
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Replying to: crash227 (Aug 20, 2008 9:09 pm) Also, I had a problem with windows, had all four replaced. Now, it seems to be running great. I'm getting 25 mpg average on highway, plus I've got a bit of a leadfoot. I don't know how to tell if the EGR valve is bad. So, I thought I'd write. Sometimes when I come off of the highway, it will act like no fuel is in the engine or the mixture is bad and I lose a bit of power, almost like it's ready to back fire, but doesn't do it. If I give it a bit of gas, then it seems to return to normal.
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Replying to: medtimer (Sep 03, 2008 6:44 am) |
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