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Jeep Liberty Diesel

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Comments

  • anomiousanomious Member Posts: 170
    Hi! Dave...Is it loud? Is it a cat-back DIY unit? Where can I find info about it? I put a Borla stainless steel system on my Cherokee and it's a bit louder than I would have liked.
    Thanks! good luck with it. LK :)
  • anomiousanomious Member Posts: 170
    Thanks for the info and picture Dave! A free exchange of info and knowlege is a wonderful thing.
    LK, :P

    P.S. Whoever deleted your post should reread "Rules of the road" I can't see where a manufactures link violates any of the rules. LK
  • unclebubbaunclebubba Member Posts: 80
    Just wanted to give y'all some more reading material. I've made specific inquiries to K&N company regarding MAF failures and the passing of "lots of dirt". Will post the response when it comes. In the mean time, below is the claims made by K&N on their site. If it isn't true, then someone has a solid case for a class action suit based on the following claims!

    A Word About Filtration Requirements

    There are few areas more confusing than identifying dirt retention requirements when it comes to air filters. Most vehicle owner’s manuals remain silent on the point. In fact, few air filter manufacturers publish any information as to the filtration efficiency of their filters. This stands in marked contrast to oil and fuel filters where there is a relatively large amount of information regarding filtration requirements and capabilities. Studies have shown most engine wear is caused by particles 10 to 20 microns in size. K&N air filters, like most quality disposable air filters, provide excellent filtration of these particles.

    To ensure our air filters provide a high level of dirt protection, we regularly test our air filter designs using the testing procedure described above. Those tests demonstrate K&N air filters generally achieve overall filtration efficiency in the range of 97% - 98%, while some of our air filter designs have achieved levels as high as 99%. The fact that our air filters at times reach overall filtration efficiencies as high as 99% while maintaining high airflow is a testament to the quality and capabilities of our oil impregnated cotton air filter medium.

    On occasion we see “new” air filter media’s developed and sold under the premise they provide increased levels of dirt filtration. More often than not, as opposed to quoting specific efficiency numbers, this “increased protection” is described as increased dirt retention capacity, meaning the filter can hold more dirt before requiring replacement. Remember, K&N air filters have always provided a service life in excess of disposable filters and then only require cleaning and oiling for re-use.

    We encourage customers to do their homework and be aware of the filtration capabilities of an air filter before they buy. Our own testing has revealed wide differences in filtering capabilities. We were surprised to see some disposable paper air filters with an overall filtration efficiency as low as 93%. We hope we have provided enough information to ensure consumers know what they are getting when they buy a K&N air filter.
  • unclebubbaunclebubba Member Posts: 80
    Here is a link to the results posted on independent lab tests of the flat K&N air filters(OEM replacement type) that you would use in the CRD. Hope it helps to clear the air!! ;)

    http://www.knfilters.com/images/factstab1.gif

    Independent Laboratory Test Results

    In order to verify our filters maintain filtration levels necessary to protect your engine, we test our filtering media through independent laboratories. The testing procedure used is the SAE J726 air filter test procedure established by the Society of Automotive Engineers (These are the folks who are supposed to know everything).

    We have included a detailed example of test results using the SAE J726 procedure. These results are for two individual air filters that each demonstrated among the highest overall filtration level we have achieved with our media.
  • cubejockeycubejockey Member Posts: 8
    I'm noticing that my CRD is hesitating at this speed. It usually happens when I get past the onramp, I'm up to 60 mph and I'm stepping lightly on the pedal a bit.

    What's causing it?
  • steverstever Guest Posts: 52,454
    We have a whole discussion devoted to K&N Air Filters, bolt-on power?.

    Steve, Host
  • sailormonsailormon Member Posts: 48
    We tried going less, but the pack pushed us along. As I recalled,I drove at 65 and my wife when she drove, pushed it to 70 to try and stay with traffic. Younger women and all that you know. SAme in fl. BR
  • tired_old_davetired_old_dave Member Posts: 710
    Anomious,

    It wasn't our host. I was tired and used a phrase I have read many times. This proves the power of the written word. It is not offensive to me nor do I think or act that way. It was a way to describe the sound. Our host was very sophisticated in the nudge for my phrase.

    I have been nudged before and am trying to remember how to rephrase and repost. You know I like to stay here and lurk at other levels of knowledge. Some people badmouth some forums for their restrictive use of their forum or the multitude of posters with no tolerance or an attitude.
  • unclebubbaunclebubba Member Posts: 80
    Hi Steve!

    Thanks for the link to the K&N forum. I just was compeled to post what I had found, since so many have made claims that may or may not be first hand accounts. Obviously the statements made by a manufacturer are biased, but at the same time, those statements are construed as literal contractural statement in courts. That being the case, it is important, that if these issues are, indeed, first hand accounts, these persons do have recourse and I want them to realize it. Again, thanks for the link and I will be visiting it. :)
  • tired_old_davetired_old_dave Member Posts: 710
    I found out about them vs magnaflow vs flowmaster on one of my lost lurks lately. retmil46 deserves the credit. The picture in the post was at the shop taken by the installer laying on the floor. While driving back today the engine felt freer. Reports exist of 2 to 3.5 mpg increases with anything other than the stock muffler are out there. My better half says it is throatier and the way it should've sounded from the factory. It is not a tenor whine and it is not deep. The better half just said baritone. I almost posted "sorry, no soundtrack". The muffler was not sooted up bad but the restriction was there. Muffler lists for $192. Installs can be cheap but we paid the speed shop owner to do the install and not a muffler shop. The owner builds/races SCCA and a lot of other abilities. He is the local dealer that we got from the web site, aero-turbine
  • faroutfarout Member Posts: 1,609
    If you are re fueling with your engine running don't. If you are stopping your engine make sure your fuel cap is tight, if none of these try checking your water/fuel filter. Hope this helps.

    Farout
  • faroutfarout Member Posts: 1,609
    Athis and much more helpful information in found in the OWNERS MANUAL.

    FAROUT
  • tired_old_davetired_old_dave Member Posts: 710
    Anomious,
    Added a second picture to link at post 3277. The rounded aero muffler sits perhaps a little lower. The engine feels better, seems to easily get up to highway posted speeds and above before you know it. No report on mileage yet. No regrets, would buy it again, aero's web site testimonials report lower egt's. Local experience from the dealer(PS F350) is showing Dodge Cummins reporting the best gains of at least 4 mpg.

    Sean, the parts manager at Grubbs Jeep, drove it and got a big smile and started talking cold air intake, even mopar cold air. I got burned with a K & N overoiled from the factory on an E150 5.4 conversion van - don't want to buy any more MAF's.
  • synlubessynlubes Member Posts: 184
    am running 5-40 amsoil in mine and going to change every ten thousand miles also will run cetane boost for egr valve protection have nine thousand miles now with no problem be sure to blow its nose about one a week
  • lightnin3lightnin3 Member Posts: 153
    Hi Cubejockey !,
    My guess-tamate would be that you fueled up with some old water filled diesel fuel.
    1/giveher a good 16 .oz dose of power service fuel,additive, Stanadyne,or any diesel additive that,will clean injectors ,take the water out,and improve cetane.Do this at a 1/2 tank,as water sits at the bottom.
    This should take the water out of the fuel.

    Then fill up with a premium diesel fuel,like B.P premium diesel,Shell ultra,or a no.1 diesel fuel of some sort.

    2/make sure you are up to operating temperature before getting on the hyway.Your overdrive won't engage until the tranny fluid is up to temp.A hint would be to plug her in at night to keep the oil warmed up for faster warm up time.

    3/check all fluid levels.A low level on the tranny fluids would cause a hesitation.
    Let me know after a week how you do...
    Happy Newyear..
    Lightnin3..
  • whitgallmanwhitgallman Member Posts: 121
    Tell me how to "blow it's nose"?

    What is your oil filter?

    I recommend a biocide like Bio=Bor JF from Hammonds (West Marine stores have it). It also acts as a libricity improver. Use about 270 ppm twice a year. Mercedes had endorced this back in 1980's.
  • synlubessynlubes Member Posts: 184
    new to the forum have a crd liberty would like to install aero muffler do you have to change computer settings when you do
  • synlubessynlubes Member Posts: 184
    put it in second gear and stomp it hard up to about forty five hundred rpm it will blow the egr valve clean i use a hastings filter it was the only one i could find that met speck i am abaldwin distributor and they did not have one
  • trumpet_washertrumpet_washer Member Posts: 48
    I disabled the DRL's on my VW for two reasons:
    1) Reducing the voltage burnd out the lamps, and they are quite expensive to replace.
    2) No one will rear-end you because it's dark and you think your lights are on.

    He just changed the settings in the on-board computer.
  • trumpet_washertrumpet_washer Member Posts: 48
    Something to do with bodily functions? Of possibly large mammals? Anyway, that's a nice muffler and a good install.
  • tired_old_davetired_old_dave Member Posts: 710
    No computer settings have to be adjusted.
  • tired_old_davetired_old_dave Member Posts: 710
    Are you asking about my phrase that my better half said to replace with "tenor"?

    For all the curious and not to (by omission) cause more conjecture, here goes another try.

    The phrase replaced by "tenor" is the sound sometimes associated with small displacement, high rpm engines, whose exhaust is modified and is evidenced by a large shiny canister protruding down below the rear bumper.
  • faroutfarout Member Posts: 1,609
    Those at Star told my dealer that the reason my cruise control is kicking out at the bottom of a long hill or dip going down is because the controller thinks that the diesel is running out of control. This can be a real situation as not to long ago diesels could not haul prophane, as they could get a snort of prophane and "run away." The controller is made by Bosh, not DC. Star saya the cost for a pilot is not within reach for the amount of CRD's made so far. This is also why there are no pilots for the CRD in the USA, because these are made specfic for the Jeep CRD. As of the end of 05 CRD run, 8,333 were made and perhaps 5,000 06 will be made this year, depending on market demand. All this to say to make these pilots is not feasible at this time. According to those at Star, this is the very first issue of the cruise control dropping off they have had. Which I find real hard to believe. My point is if this is the first time anyone has brought it up then it may point even more to there is a problem with mine. I wonder is this is a lot of "hot air"?
    Has anyone out there had their cruise control kick out? OR has anyone got a suggestion? I appreciate any ideas, & Happy New Year 2006!
  • geedubbgeedubb Member Posts: 34
    I have a CRD and to date I'm happy with it. The exception is that the interior lights don't come on when the back window or tailgate is opened. I searched for a door switch and found none and I couldn't find reference to the lights in the owner's manual.
    Is it just mine or are all the Liberty's cursed with this annoyance? :(
  • ttandjjttandjj Member Posts: 21
    Open the rear door (tailgate). Lean in and look up at the dome light. Press the clear light housing lens. It should light up. I believe they come from the dealer in the off mode. The light will go out when the door is closed. Your welcome, The T :shades:
  • tired_old_davetired_old_dave Member Posts: 710
    And Happy New Year to all.

    Months ago I repeated a story here that was told to me about a diesel tanker that ran away while fueling underground tanks with gasoline(in-law was the driver).
    I believe the response I got here was that the flap you hear a short time after turning off your CRD would prevent that. And I never have shut my engine off while fueling up, but I also don't let the fuel level get down to one quarter of of tank-mixing may help if some bad fuel gets pumped in. What are your rpm's when the cruise cuts out?
    I don't think it is a runaway event, more like a short or a glitch somewhere.
    Time to sign off and join the party-two hours til the ball drops for us in the central time zone.
  • mdamickmdamick Member Posts: 277
    What do you mean "kicking out"?
    Mine will drop into 3rd to slow it down on a long hill.
    When the speed gets to the set point it will shift back up and go. This may be what you are experiencing.
  • synlubessynlubes Member Posts: 184
    thanks dave am new on the computer so if i mess up let me no i would like to put taller tires on thinking about michelin it has 225 wranglers now and they are terrible on wet conditions had a 2002 liberty same problem got ant advice my millage not as good as every body else seems to be i get about 19 to 20 in town and about 22to 24 highway thank you
  • bullheadbullhead Member Posts: 125
    Happy New Year, All !

    My March '05 unit has had no EPROM updates and the cruise control completely disengages below 32 MPH. A needed update to the programming will bring that down to a more useful ~25 MPH, someday, hopefully. Does anyone have different results indicating the low-speed cruise control improvement?
  • bullheadbullhead Member Posts: 125
    This website is traveling rocket-fast for me now without all the animations overhead related to advertisement.

    Hope it's a permanent condition not related to a holiday lull in business ! The animation can be, and was, overdone. At least as deployed here. See how cool software updates are !

    Porty programming is poor deployment, anywhere.
  • steverstever Guest Posts: 52,454
    There were a bunch of server upgrades last month and the number of forum servers was expanded. I don't think the ads or video links changed; in any event, glad you're rocketing along. :-)

    Steve, Host
  • geedubbgeedubb Member Posts: 34
    Open the rear door (tailgate). Lean in and look up at the dome light. Press the clear light housing lens. It should light up. I believe they come from the dealer in the off mode. The light will go out when the door is closed. Your welcome, The T

    Thanks. I thought that just turned the lights on and left them on.
    I'm a happy camper now!

    Happy New Year.
    Gary
  • anomiousanomious Member Posts: 170
    Hi! Had the same problem with the Goodyears... I have Michelin's on my Cherokee Sport and they do break loose in the wet. I put Bridgestones on the liberty, 245-70-16. The Alenza is a fantastic road tire and if you go off road or in deeper snow, the Revo's rule! Check out Tire rack's comparison charts.
    Besr of luck! LK
  • gagricegagrice Member Posts: 31,450
    Hi! Had the same problem with the Goodyears...

    I have the OEM GY Wrangler STs on my GMC Sierra. Went out in the rain last night for the first time on wet pavement. They have to be the worst rain tires I have ever driven on. I'm going back to the GMC dealer and try for a trade. I have less than 700 miles on the truck.
  • whitgallmanwhitgallman Member Posts: 121
    I read an article that said a Liberty CRD could do 0 to 60 mph in about 10 seconds. I've noticed it being pretty prompt, sometimes unexpectedly.

    Do you think it would do better in full time 4 wheel drive? ;) Any personal experiences?
  • whitgallmanwhitgallman Member Posts: 121
    "Run away diesel" traditionally meant that the engine was so worn out that it was getting lots of engine oil into the combustion chamber, running on it's own engine oil. This usually ends in a crankcase explosion when the cylinder bore gets a friction hot spot that ignites the oil vapors in the crankcase. Yes you want to "bail out" incase of that.
    Dodge Cummins owners manual points out that if you park a running diesel over a puddle of gasoline, the gas vapors get sucked into the air intake and rev up the engine. I did this by spraying some WD-40 down the intake of my (Olds-GM V-6) diesel Cadillac.
    How sensitive is a Jeep CRD to having the intake suck in a flammable vapor with it's intercooler? Is there a over rev governor on the CRD engine? (wouldn't be effective if it can't cut off the fuel source 'cuz the fuel is coming in the intake pipe.)

    Has anyone come up with a propane kit for a CRD engine yet? (would make it prophane, beat 10 sec 0 to 60's)
  • whitgallmanwhitgallman Member Posts: 121
    On my Ram Dodge (Cummins Powered ;) ), the cruise would kick out on bumps because the brake peddle level was pushing on the Cruise kill switch. Brake peddle lever was heavy and kill switch was set hair trigger. I'd stick my toe under the peddle for forseen pot holes. Then I reset the cruise/brake kill switch.
  • anomiousanomious Member Posts: 170
    Check out the german made "Dieseltuning" module...It should make it really go! 30 more horses and 60 more lb. ft. of torque. It's a "dotcom" co.

    Let us know what you think about it.
    Thanks! LK
  • whitgallmanwhitgallman Member Posts: 121
    I'm kind of chicken to raise the BMEP on the CRD. I ran the timing up on my GM-Olds Cadi V-6 and blew a head gasket after a while.
    CRD's cylinder head is aluminum on an iron block like the Cadi diesel.
    Is there any experience with head gasket leaks on CRD's (too young)?
    Coefficient of thermal expansion between the iron and aluminum makes me think about retorquing the head bolts at 80k to 90k miles (about the time we're supposed to change the timing belt)(just a whit of head bolt preload loss on each heat-up/cool-down cycle)
    I'll open the intake & exhaust (lower pressure drop) though. I consider that "free" power.
  • anomiousanomious Member Posts: 170
    Dieseltuning claims that they do not increase the boost, they modify the timing and duration of the injection.

    :confuse: LK
  • tired_old_davetired_old_dave Member Posts: 710
    "I'll open the intake & exhaust (lower pressure drop) though. I consider that "free" power."

    I've opened up the exhaust and now I guess I'm riding that train. Here or elsewhere, talk of donaldson filters and aem filters using nano fibers (no oil needed).

    I'm open for opinions. Use the air box with a replacement filter, if available, or go cold air without the oiled filters. How does a cold air unit handle the maf sensor.
    Caribou1 talked about the air filter and box a long time ago. I didn't think I'd be messing with air flow, sorry caribou1.
  • psychoguypsychoguy Member Posts: 4
    A "run away" diesel means just exactly that- it is no longer under control. For what ever reason; a defective engine control system, or there is an alternate fuel supply that is feeding the engine and the operator nor the governor/computer/engine management system has control of the engine. As such the engine will continue to run and/or build RPM's until the alternate fuel source is removed, the air supply is shut off or the engine self destructs. The alternate fuel source can be ether, gasoline fumes, oil- basically anything that can be a fuel or fuel substitute, vapors or liquids that will burn. Detroit Diesel's 2 cycle engines were well known for this. Over filling the crankcase with oil, leaking turbo or super charger seals are just a few of the ways of causing a run away situation. Oil leakage past the piston rings, though not necessarily due to being worn out but from prolonged idling is another source (the design of diesel piston rings do not efficiently control oil splash in the cylinder when left idling after several minutes but do at engine speeds at or over 1000 RPM). Older mechanical fuel injection systems including Cats relied upon shutting off the air flow to shut down runaways in the past. Diesels can also run backwards and that too is a runaway condition. Wild but true. I've seen several runaways in my former 20 yrs diesel experience. The Liberty Diesel is a 4 cycle manufactured by Detroit Diesel in Italy. I am unfamilar with this fuel system set up but all are basically similar. If your engine runs away, it still needs air to run, and since you can no longer control the fuel source, shut off the air supply- plug up the air stream. You usually have a short window of opportunity before it blows, but hopefully the alternate fuel source will burn out or go away or you can sut off the air supply before then.
  • psychoguypsychoguy Member Posts: 4
    I had a '93 Concord several years back, my first Mopar product. The cruise would keep the car speed constant, up hill or down. The cruise unit would even shift my transmission out of overdrive going downhill, and work to maintain the set speed with further downsifts to a point, but would disengage if the preset computer control sensed a dangerous potential overspeed condition. Perhaps that is your experience as well, though I'd check with Mopar for their response as they sired it, and it is their baby. The diesel over rev range will be lower than the gas counterpart. Alternately you may look into an engine brake if there is one for your vehicle. That will save brake wear as it uses the natural braking action of the engine to slow the vehicle. There is one for the Cummins Diesel, unsure if one is ready for this diesel yet. It may also solve your original issue.
  • whitgallmanwhitgallman Member Posts: 121
    In one instance (operational experience from my industry) a Bessimer medium speed diesel (~5,000 hp at 450 rpm) had a con rod link pin fail and the piston went out the crankcase wall. After the smoke cleared and the fuel was shut off the engine was still running. They closed the air intake valve BUT it kept on chugging. The fire crew had to fill the crankcase with foam to get it to stop. In telling this story, the Bessimer engineer said "We stand fully behind our engines! but not beside them." ;)
    All our big diesels have a big red panic button that shuts fuel and closes the air intake. Crankcases have expansion valves to vent the vapors but not let fresh air back in.

    My thought on the CRD is that the computer probably knows the rpm and can cut off fuel via computer driven fuel injector solenoids at red line, but if the fuel is from an uncontroled source like gasoline vapors on the ground coming up the intake, the engine isn't protected from possible overspeed. If we realized the problem, we could put CO2 fire extinguisher up the intake (shake a big bottle of soda pop), of course, move the car, wash away the gasoline puddle? All McEiver kind of thoughts for something that isn't very likely.

    Our synthetic oil is a protection to some extent in that it doesn't produce as much vapors as it heats up and it's EP properties reduce the likelyhood of cylinder hot spots.
    We use 800 gallons of Mobil 1 15W-50 in our 5,000 hp emergency diesels. (Yes it was $4 a quart. Oil change interval based on analysis.)
  • cubejockeycubejockey Member Posts: 8
    hey I read that Consumer Reports article this morning. Those dorks!

    Were they talking about an early version of the CRD? Because mine is not a V6 and my woman was sold on the fact it was quiet.

    I agree that our federal MPG guidelines are crap...No mention that the the MPG is better than 11 on a 4 cylinder. I think that was biased BS!

    CR Liberty a miss

    CR says that Liberty CRD is one of the misses of 2005. Noisy, slow and poor mpg.

    Consumer Reports got it wrong!

    Liberty will deliver it's fuel economy rating of 21/26 and will exceed it if driven to maximize mileage.
    Acceleration test results show it to be faster, the same, or a bit slower than V6 gas version of Liberty depending on who is testing it.
    Noise, OK, I will concede that while the CRD is acceptable to me, it could be a bit quieter and I've driven quieter diesels in Europe.

    If I subscribed to CR I would cancel!
  • lightnin3lightnin3 Member Posts: 153
    Ok Cube !
    What are we going to do about this ??
    Maybe write to the editor of CR how disappointed we were about his analysis.

    That we have differing results in our jeeps.How about suggesting he pay a visit to our website,and ask us what we think??
    As you notice they only drive their vehicles in the city probably to the grocery store,rather than on the hyway.

    This is why I am glad to see other critics out there like J.D.power& Associates,who are not so biased .

    How I battle the biased is I went to a sign company and got a logo painted on my new plain rear wheel cover,
    stating it was a
    "Liberty Diesel"
    my mpg's,
    gallons the tank holds,
    , towing capacity and 4X4.

    Boy ! did I get a reaction,last summer ...In Canada our gas went up to $5/gallon<$1.06/litre..4.5 litres to a gallon in Ontario and here I was driving around Windsor,

    I must have had 12 people stop me to ask how I liked it.
    Some were beligerent and didn't believe it,I just said you'll just have to go to the dealership and drive one eh??.
    I am hoping in some small way I can influence sales in this awsome DCX product.
    Speak Soon...
    Lightnin3...
  • jkinzeljkinzel Member Posts: 735
    The particular tug I&#146;m on now is powered by two Cat D398 (AT) (1125 hp each) These are equipped with over speed trips that shut off the fuel and close a butterfly valve in the air intake manifold when the engines exceed rated RPMs. Works very well.
    I think anyone that owns a diesel equipped product should be aware of the characteristics of diesel engines. Governor failures, base explosions, runaway engines are VERY rare. I have worked on tugs through my high school years and after the getting out of the Navy for a total of 40 years and have never witnessed any of these. I have heard stories of old slow speed diesel sinking boats when a base explosion put a hole in the bottom
  • supertechsupertech Member Posts: 32
    I just finished reading that CRD will be an option on the new Wranglers and Dodge will offer them on there new Liberty based SUV :):)
  • jkinzeljkinzel Member Posts: 735
    YES!!! Never been a Chrysler fan, but they are winning me over. If they keep it up they are going to get a big market share of diesel fans.
  • craigs1969craigs1969 Member Posts: 20
    Where did you read this?
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