[ACX]

:twisted:

THE StarSCAN® FLASH FILES FOR THIS BULLETIN MUST BE RETRIEVED FROM
THE INTERNET.
StarSCAN® SOFTWARE LEVEL MUST BE AT RELEASE 7.04 OR HIGHER FOR THIS
BULLETIN.
SUBJECT:
Flash: Launch Performance / Driveability Enhancements
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the GPEC Powertrain Control
Module (PCM) with new software.
CAUTION: VEHICLES EQUIPPED WITH A CVT TRANSMISSION MUST HAVE THE
TRANSMISSION CONTROL MODULE (TCM) CHECKED FOR THE LATEST
SOFTWARE LEVEL WHENEVER THE PCM SOFTWARE IS UPGRADED. IF
NEWER TCM SOFTWARE IS AVAILABLE, IT MUST BE INSTALLED.
MODELS:
2007
(MK49)
Compass
2007
(MK74)
Patriot
2007
(PM)
Caliber
NOTE: This bulletin applies to models equipped with a 1.8L, 2.0L or 2.4L gasoline
engine (Sales Code EBA, ECN or ED3) on PM/MK models built before April
21, 2007 (MDH 0421XX).
SYMPTOM/CONDITION:
Some customers may experience the following:
•
Automatic CVT models - Perceived lack of performance under light to moderate
acceleration from a stop.
•
All Models - Ticking Sound intermittently heard from the engine compartment.
Software changes have been made to improve the above bullet points. In addition,
changes to maximum RPM in neutral have been made to assist A/C compressor function
during cold ambient temperatures to prevent A/C compressor slugging.

 

[Webmaster]

....This bulletin applies to models equipped with a .... 2.4L gasoline engine ... built before April 21, 2007 .... Perceived lack of performance under light to moderate acceleration from a stop.....

Hey! That all applies to me. I'm going to ask my dealer about that. Thanks!

See this thread I made regarding the sluggish/hesitation when accelerating from a stop:
http://www.myjeepcompass.com/forums/viewtopic.php?t=227

This may be the answer to some of our problems!!!!!

 

[AmercanEagleDude]

So I went to the dealer today to have something else repaired and inquired about the Software update. They said there was one, so they flashed the car. W/E that means, lol.

With the update the transmission feels so much smoother. There is no more big decline (almost like braking) when you let off the gas while accelerating from a stop.

If you transmission feels funny when accelerating from a stop, definitely take it in to the dealership and get the update.

 

[Webmaster]

Thanks for the update. I've got my Jeep booked in for July 4 I think it is. I wonder if we'll see any improvement in mileage? If the tranny is more efficient and smooth, just maybe we'd get an extra 1mpg ;-)

 

[flybynight_x1]

[quote="ACX]All Models - Ticking Sound intermittently heard from the engine compartment.
[/quote]

I aways thought that ticking sound wasn't right.

Still seems strange, I've heard of flashing the bios on a motherboard, but to flash software on a car?? LOLOL

 

[farout]

:twisted:

THE StarSCAN® FLASH FILES FOR THIS BULLETIN MUST BE RETRIEVED FROM
THE INTERNET.
StarSCAN® SOFTWARE LEVEL MUST BE AT RELEASE 7.04 OR HIGHER FOR THIS
BULLETIN.
SUBJECT:
Flash: Launch Performance / Driveability Enhancements
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the GPEC Powertrain Control
Module (PCM) with new software.
CAUTION: VEHICLES EQUIPPED WITH A CVT TRANSMISSION MUST HAVE THE
TRANSMISSION CONTROL MODULE (TCM) CHECKED FOR THE LATEST
SOFTWARE LEVEL WHENEVER THE PCM SOFTWARE IS UPGRADED. IF
NEWER TCM SOFTWARE IS AVAILABLE, IT MUST BE INSTALLED.
MODELS:
2007
(MK49)
Compass
2007
(MK74)
Patriot
2007
(PM)
Caliber
NOTE: This bulletin applies to models equipped with a 1.8L, 2.0L or 2.4L gasoline
engine (Sales Code EBA, ECN or ED3) on PM/MK models built before April
21, 2007 (MDH 0421XX).
SYMPTOM/CONDITION:
Some customers may experience the following:
•
Automatic CVT models - Perceived lack of performance under light to moderate
acceleration from a stop.
•
All Models - Ticking Sound intermittently heard from the engine compartment.
Software changes have been made to improve the above bullet points. In addition,
changes to maximum RPM in neutral have been made to assist A/C compressor function
during cold ambient temperatures to prevent A/C compressor slugging.

This is the very thing I have been saying Our 2.4 is gutless from a dead stop, no matter if you just lightlu press the gas or really punch it :!: To me the 2.4 has been a real poor preformance engine. Hope this might help. :wink: I will call the dealer Monday.

 

[Webmaster]

This is the very thing I have been saying Our 2.4 is gutless from a dead stop, no matter if you just lightlu press the gas or really punch it :!: To me the 2.4 has been a real poor preformance engine. Hope this might help. :wink: I will call the dealer Monday.

farout, I had the software update done. I didn't notice much. I still have a perceived lack of "low-end" power. When I put the shifter in "L", it is WAY more responsive which leads me to believe that the CVT is soaking up WAY too much of the 2.4L's power.

While my Compass was in the shop I had a brand new Caliber with the 2.0 CVT. It was noticeably more responsive than my Compass. I'm not sure what the weight difference is between the two (the Caliber was FWD and mine is not)....

 

[RedVortex]

I also had this update done on my Compass.

The CVT reactions are now very much different than before and I like it much better.

However, from a dead stop, I agree with you, it is still very sluggish, only improved by a little something almost indistinct from before.

I'm pretty sure this can be fixed by a software update.

This engine is quite powerful you know. I'm pretty sure that's because the "gear ratio" (even though there's no gear) they programmed for the CVT when you accelerate from a dead start is tuned for comfort, not performance.

It really should be set to use the full torque of the engine if you step on the gas all the way down. We should be able, I believe, with this kind of transmission to have a very quick acceleration, pretty much the same feeling as an acceleration in first gear with a manual transmission because there's an infinite possibility of "gear ratios" because of the variability of the transmission.

It is known, however, that CVT transmissions aren't very good at giving torque but they are still improving on this. I read that somewhere regarding CVT and performance cars, can't remember where though.

It just seems to be "tuned" to have a smooth ride instead of a performance one, too bad.

RedVortex

 

[farout]

The Avenger and the Chrysler Sebring has this 2.4 engine mated to a 4 spped transmission. Has anyone driven one of these two vehicles to see how thed do ? I think this would give a better idea as to if the CVT is dragging it down in the Compass.

 

[farout]

I called my dealer yesterday, and was told they knew nothing about such fix for no or low power. So I faxed the dealer the Flash file information. So now I will see what they say. :lol:

 

[Neely2005]

I called my dealer yesterday, and was told they knew nothing about such fix for no or low power. So I faxed the dealer the Flash file information. So now I will see what they say. :lol:

Well it should be interesting to see what the dealer says now...