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Author Topic: Sluggish WJ  (Read 5010 times)

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mr s

  • Guest
Sluggish WJ
« on: April 07, 2008, 12:53:10 AM »

Hi all,

Firstly, apologies for wading in with questions & extra apologies for possible silly questions.

Bought the jeep a few weeks ago so still getting to grips with it.  We seem to have the usual electrical niggles, heated seat doesn't work & no matter how many times I set the mirrors they always go back next time I get in the car but the biggest issue seems to be fuel economy (or lack thereof).

I've never had an auto before so my driving style could be part of the problem.  Since buying the car it has been crippling me with it's drinking habit, trip computer is displaying an average of 15mpg (2.7CRD 2002).

The car also feels very reluctant when cold, especially early mornings.  For example, sometimes, due to the inconsiderate parking of others I am forced to exit the carpark forwards over the kerb rather than reversing out of my space.  In my old car (L200 manual) this was an easy task but the Jeep just rolls up to the kerb and then simply will not rev even with my foot to the floor.

Any advice would be appreciated on this, even if it's adjustments to the way I drive the car that is needed.  Once again, apologies for getting straight down to business.

Mark
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Mike Pavelin

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« Reply #1 on: April 07, 2008, 08:21:06 AM »

Difficult to tell without road testing it, but it doesn't sound happy. Ours used to average around 25 mpg. It might be worthwhile coughing up £100 or so for your local dealer to road test it and do a full diagnostic scan on all the computers to se if there's anything afoot.
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mr s

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(No subject)
« Reply #2 on: April 07, 2008, 01:43:17 PM »

Thanks for the advice.  25mpg was the magic number I had in mind when we bought the car.

I've been reading up a bit and have just tried the key jiggle reset button thingumy and reported a fault code of P0702.  From a previous post I see this could be a mutitude of things related to the transmission. :cry:

Could anyone suggest any checks I or my normal service centre can do before going to the dealers?
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Mike Pavelin

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« Reply #3 on: April 07, 2008, 02:03:04 PM »

P0702 is the engine control module giving just a general indication that there is a transmission fault, with about half a dozen possibilities. Only a Jeep dealer will have the correct software to get into the transmission controller to get specific codes for this problem. All you can do is check visually for damaged wiring and check the transmission fluid, although, IIRC, they don't have a dipstick to check the level, just a blanking cap ob the top of the dipstick tube.
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mr s

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(No subject)
« Reply #4 on: April 07, 2008, 08:53:41 PM »

Thanks again.  Think I'll get it into a dealer some point soon (before I have to sell the house to feed it's drinking habit).  Just used the car again tonight to tow my empty trailer on a short motorway run.

Again it averaged around 15mpg, but on completing the journey there was a very warm smell eminating from the car.  Coolant temp showed normal so can only guess it's related to the tranny.  Must check the fluid level methinks.

You've been a great help so far, greatly appreciate it.
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