[WK-916]

Originally Posted by charlesrshell

Thanks, it really sucks. Not just not having our Jeep, but I don't think I will ever trust it again. Will be really nervous to take it on a trip. No update from the dealership. The technician that is in charge of working our problem called in sick today. He has not briefed the latest to the service writer. I hope to find out more Monday.

Called in sick? He probly said..... Screw this Jeep....!!!

[charlesrshell]

Originally Posted by WK-916

Called in sick? He probly said..... Screw this Jeep....!!!

LOL, yep probably so. Going to call them soon for an update.

[yzjwk]

Originally Posted by charlesrshell

No, it has factory remote start and security.

I think even the factory command start uses an external controller that's not in the PCM . If it was connected incorrectly or there was a loose connection between it and the security interface module ,i think it could still cause the stalling . Just an idea anyways .

[charlesrshell]

Originally Posted by yzjwk

I think even the factory command start uses an external controller that's not in the PCM . If it was connected incorrectly or there was a loose connection between it and the security interface module ,i think it could still cause the stalling . Just an idea anyways .

I will ask them. Just called and the technician is still out sick again today. Will try again tomorrow.

[charlesrshell]

Update: Under Chrysler's guidance the technician borrowed an accelerator pedal from another Jeep HEMI and installed it. So far it has not stalled. He did all this today. He is driving it home tonight and will continue to ops check tomorrow. If it does not stall he is going to order a new accelerator pedal. Chrysler folks said they saw the accelerator line in the data from the flight computer was not acting correctly. The new wireless remote controller did not fix the problem that was changed last week. Technician is going to call me tomorrow to let me know if the HEMI is still running good or not. Walt, what do you think? Maybe they or finally on to something causing all the stalling.

[Walt]

Originally Posted by charlesrshell

Update: Under Chrysler's guidance the technician borrowed an accelerator pedal from another Jeep HEMI and installed it. So far it has not stalled. He did all this today. He is driving it home tonight and will continue to ops check tomorrow. If it does not stall he is going to order a new accelerator pedal. Chrysler folks said they saw the accelerator line in the data from the flight computer was not acting correctly. The new wireless remote controller did not fix the problem that was changed last week. Technician is going to call me tomorrow to let me know if the HEMI is still running good or not. Walt, what do you think? Maybe they or finally on to something causing all the stalling.

Anything is possible with these electronic enigmas. Jeeps and HEMI's are not supposed to be this sensitive. Imagine trying to go offroad with this "hangar queen".

I'm guessing on this: The accelerator pedal probably tells the throttle body motor where to position once the pedal leaves the idle position. I would guess that the signal is a dual one that should switch back to the engine controller once the accelerator pedal goes back to the idle position. I'll look in the FSM to see if there are any clues to pursue. If the transition were not smooth or the idle signal not generated, it might cause the engine to stall by letting the throttle plate go completely closed.

Blind parts replacement will eventually solve it, but your Heep might turn to dust before the offending part is located.

[charlesrshell]

My Heep has already turned into dust as far as I am concerned. We will feel real uncomfortable taking it on a road trip. I wonder if the defective accelerator pedal is the reason why my wife and I have always noticed a slight delay when giving the HEMI the gas! This is the first vehicle we have driven that is completely fly by wire from pedal to throttle body. There seems to be a .5 second or less delay when you accelerate. I have complained about it since day one to the dealer. Two different dealerships have told us that is how the electronic accelerator cars are. So we have just gotten use to it. I hope a new accelerator pedal improves that delay some. Has anyone else noticed the delay when accelerating your vehicle with fly by wire fuel system?

[007overland]

Charles,

I have the same lag on the accelerator a .05 delay. I told the dealer about this too and they say it's normal. But I just got my charger rt 5.7 same hemi, and no lag at alll it's just as responsive as a throttle cable.

Also I noticed that on a wArm start up (engine temp a lil under half) if I turn the truck off and run in the bank come back out within 5 mins and start it and I revs like it's winter at 1300 rpms. If I wait for it to drop to 750 it will take 3 minutes. This isn't every now and then it's consistent every time I start it cold or hot. I had 2 dealers look into it the first said it's normal, but when I asked to see anotheR 07 jgc 5.7 start up they never had one around. The second dealer recognized it as not normal and changed throttle body and other parts but the issue was still there.

I do have an aftermarket compustar alarm and factory remote starter. The dealer tried Playing that card but I sent my installer to the dealer to remove the aftermarket accessories. Sure enough that didn't change a thing

[charlesrshell]

Originally Posted by 007overland

Charles,

I have the same lag on the accelerator a .05 delay. I told the dealer about this too and they say it's normal. But I just got my charger rt 5.7 same hemi, and no lag at alll it's just as responsive as a throttle cable.

Also I noticed that on a wArm start up (engine temp a lil under half) if I turn the truck off and run in the bank come back out within 5 mins and start it and I revs like it's winter at 1300 rpms. If I wait for it to drop to 750 it will take 3 minutes. This isn't every now and then it's consistent every time I start it cold or hot. I had 2 dealers look into it the first said it's normal, but when I asked to see anotheR 07 jgc 5.7 start up they never had one around. The second dealer recognized it as not normal and changed throttle body and other parts but the issue was still there.

I do have an aftermarket compustar alarm and factory remote starter. The dealer tried Playing that card but I sent my installer to the dealer to remove the aftermarket accessories. Sure enough that didn't change a thing

WOW, I would say that is not normal. I would do two things to see if you can find out. Keep checking back with the dealer to see if another 5.7 truck like yours comes in and see what it does. Second, maybe start a new thread to see if other 5.7 truck owners have the same thing happening. I am hoping that the new accelerator pedal fixes the delay issue. But if you had the same thing happening and two dealerships have told me it is normal, I don't think the issue will be cleared up.

[Walt]

Originally Posted by charlesrshell

WOW, I would say that is not normal. I would do two things to see if you can find out. Keep checking back with the dealer to see if another 5.7 truck like yours comes in and see what it does. Second, maybe start a new thread to see if other 5.7 truck owners have the same thing happening. I am hoping that the new accelerator pedal fixes the delay issue. But if you had the same thing happening and two dealerships have told me it is normal, I don't think the issue will be cleared up.

Didn't find any clues in the FSM about transition (see my last post).

Can't remember which Jeep forum, but there is a way to change the throttle response without electronic tools.

Think it goes something like this: Bring car to a halt, hard acceleration, then stop. Another hard acceleration, then stop. Try normal driving. This was reported to improve drive-by-wire throttle response. Any other members have this handy? Maybe you can do a search for acclerator response or a related phrase.

I checked the FSM and there is nothing in there (that I could find easily in the 6 volumes). Also, make sure the dealer does the driveability flash per this TSB:
http://www.wkjeeps.com/tsb/tsb_wk_1800610b.pdf

I'll keep looking while I research my own embedded Jeep demons....

Friday, I might get to take the Silver Ghost to the dealer for them to do a warranty change on the front RHS shock absorber and try to pinpoint the latest DTC's (P0133, P0308, P0153, & P0430). Asked them to change the passenger door lock relay and the O2 sensor flash per TSB: http://www.wkjeeps.com/tsb/tsb_wk_2300108a.pdf

[90grandoneer]

The "throttle pedal calibration" "Easter Egg" has been around almost since the beginning of the LX's, and some say it works, and some say it doesn't. I've tried it on my LX over the years, but never on the WK and, IMO, it's an old "wives tale". When I bought my WK, it had a response lag and would then leap forward......very touchy and annoying. The only way I know for sure to fix it is with the Diablosport Tuner, which has a menu item for, "Throttle Calibration". As I recall, I have mine almost maxed out and it is now works almost like my LX. I think it is definitely a programming issue with the WK, but I never knew how many people had similar issues, since there haven't been many threads (that I've seen) talking about it. Wonder if the dealer's StarScan can override/modify the existing PCM programming like the DS Tuner???

[charlesrshell]

UPDATE: HEMI has not stalled since the borrowed accelerator pedal was installed yesterday. Dealership ordered one, due in next Tuesday. I hope the hell this clears up the stalling issue for good.

[Walt]

Originally Posted by charlesrshell

UPDATE: HEMI has not stalled since the borrowed accelerator pedal was installed yesterday. Dealership ordered one, due in next Tuesday. I hope the hell this clears up the stalling issue for good.

[007overland]

Wow chuck a gas peddle are you serious??? I can hardly wait till Tuesday to call the dumlership to tell em. I wounder if the lag will go away.

As for the guy with the ds tuner your off by a little bit. Now I don't want to get to far into it cause this thread is about our damn stalling issue. The ds tuner does not actually change the sensibility, actually it acts a bit like the electric pedal. (please don't start blasting me untill you read about this). When you go into that option on the ds tuner it's changing the "dead zone" and not making the response time quicker.


Chuck Please let me no if your heep stalles on Monday I pray that is the problem for both of us you have no clue how exited I am.

I don't no why Chrysler made the hemi always have less juice in the grand Cherokees than anything else. (around 400 hp in the new rams and like 372 hp 400 tq in the challenger and 368 hp 395 tq in charger) and yet the Cherokee only came 330hp in the 07. My only guess and this is a guess is the marketing dept was thinking that people buy a jeep because of the name and not the power. Way Back when, if you wanted a powerful jeep you could get the 1998 gc 5.9 and now a days if u want juice get the srt Cherokee. But on the otherhand if you were going to buy a ram or a charger it's very likely you buy those vehicles for the power. Why else would you buy a charger rt or a 300c or a ram hemi the luxury ? Hahahahahaha if that was the case you'd a bought a benZito or a bmer.

Sorry to drift off topic but good luck Monday Charles I'm counting on you. Lolol

[Jeep Brian]

Originally Posted by charlesrshell

UPDATE: HEMI has not stalled since the borrowed accelerator pedal was installed yesterday. Dealership ordered one, due in next Tuesday. I hope the hell this clears up the stalling issue for good.

I will pray tonight that this is the FINAL fix for you Jeep!!!!!