Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 12-31-2009, 08:10 PM
SPECIALED's Avatar
Member
 
Join Date: Dec 2009
Location: LONG ISLAND, NY
Posts: 43
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1771
SPECIALED is on a distinguished road
Dead-spot in gas pedal on my '05.....

I seem to have this annoying dead-spot in my 2005 grand cherokee when i get to around 40 mph. I have the 5.7 liter hemi. Has anyone else experienced this? The only way to get the car moving is to put the pedal to the floor. Is this the overdrive or is it something else that needs looking into? The only mod i've done so far is flowmaster 50 series exhaust. Should i get a tuner and see if it solves the problem? Could also be time for new plugs & wires. Any advice is greatly appreciated.
__________________

__________________
Reply With Quote
  #2  
Old 12-31-2009, 08:14 PM
HEMIBeast's Avatar
Senior Member
 
Join Date: Sep 2009
Location: MA
Posts: 3,248
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5296
HEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond repute
Re: Dead-spot in gas pedal on my '05.....

It's most likely MDS kicking in. MDS kicks in between 40-60 mph and can be disabled with a diablo predator.
__________________

__________________
JEEP GC Limited 5.7
[SIGPIC][/SIGPIC]
180訊stat,Flyin Ryan ported throttle body,Bwoody CAI,MHP CMR Tune Predator 7137,Billet tech catch can,Dynomax muffler, AR Headers,5" blk tips,CF Rammedic Hood,SRT8 Exterior,SRT8 Rails,SRT8 Grille,Custom headlight covers,Tinted Tails (Red03SilSS),Tinted windows, painted mirror covers, Painted & Shaved door Molding,Mopar Rear spoiler,painted black calipers,Black housing headlights with LED Halo's & controller,8000K H.I.D,Reverse H.I.D,20" Black SRT8 rep wheels,Falken Ziex 275/45/20,Addco Front Sway bar,SRT8 Rear sway bar,H&R Springs,SRT8 shocks,Leather Armrest,SRT8 pedals,SRT8 Shift knob,Colored cupholder,2 pod A pillar w/ Gauges,etc..
Parts awaiting install Spartan Cam, 09 Intake manifold, etc.
Reply With Quote
  #3  
Old 12-31-2009, 08:14 PM
dreamer1213's Avatar
Founding Member
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 918
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 2889
dreamer1213 has a reputation beyond reputedreamer1213 has a reputation beyond repute
Re: Dead-spot in gas pedal on my '05.....

Dead spot in the gas pedal...well...first time I've ever heard of that.

Perhaps you need to reset the PCM? Since your throttle body/gas pedal is controlled by the computer and not a cable. May be there is just a glitch somewhere. Undo the battery for like 15 mintues and put it pack together and see if that fixes it..
__________________
{ Hannes }

02 WJ Overland 4.7L H.O V8

Reply With Quote
  #4  
Old 12-31-2009, 08:16 PM
Scottina06's Avatar
JeepGarage Founder
My Jeep: 2014 6.4L SRT8 WK2
 
Join Date: May 2009
Location: Berea, Kentucky
Posts: 49,232
Thanks: 866
Thanked 972 Times in 687 Posts
Rep Power: 7717865
Scottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond repute
Garage
Re: Dead-spot in gas pedal on my '05.....

sounds like the typical 5.7 slow throttle repsonse. I have heard from 5.7 owners that there is a delay. It could also be the mds if yoiu are cruising on the highway
__________________
SCOTT
The HARDER you work...the LUCKIER you are!
2014 REDLINE red Jeep SRT "BLOODIED\BlackOps CFR Edition" 1 of 1
2013 JKU Wrangler 10A-stormtrooper'ed, JW Speaker and more!
Previous JEEP rides-
2013 Jeep Grand Cherokee SRT-deep cherry
2006 Jeep Grand Cherokee Laredo-inferno red



Twitter-The_Jeep_Guy
Instagram-thejeep_guy

Reply With Quote
  #5  
Old 12-31-2009, 08:16 PM
hemi.jon's Avatar
Member
 
Join Date: May 2009
Posts: 802
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 2795
hemi.jon has a reputation beyond reputehemi.jon has a reputation beyond reputehemi.jon has a reputation beyond repute
Re: Dead-spot in gas pedal on my '05.....

i think i know what your talking about, if your aiming at the sluggish accel around that speed its normal. just the tranny being to low in RPMs to provide the ass, but the jeep wont downshift unless you peg it. its a fuel econ thing with the tranny control i believe. i used auto stick to speed past it.
__________________
Reply With Quote
  #6  
Old 12-31-2009, 09:28 PM
Senior Member
My Jeep: 2006 5.7L WK
 
Join Date: Dec 2009
Location: Home of the Mountain Blue Bird
Posts: 1,007
Thanks: 0
Thanked 20 Times in 18 Posts
Rep Power: 154939
jeepgcoman has a reputation beyond reputejeepgcoman has a reputation beyond reputejeepgcoman has a reputation beyond reputejeepgcoman has a reputation beyond reputejeepgcoman has a reputation beyond reputejeepgcoman has a reputation beyond reputejeepgcoman has a reputation beyond reputejeepgcoman has a reputation beyond reputejeepgcoman has a reputation beyond reputejeepgcoman has a reputation beyond reputejeepgcoman has a reputation beyond repute
Re: Dead-spot in gas pedal on my '05.....

Mine used to do this too. Very annoying. Here's my take on it. At that speed (around 40 mph) at light throttle is when the transmission is going nuts, IMO. It's right at/after the 3-4 shift point, MDS may or may not be trying to cycle, and the converter clutch may or may not be trying to kick in. Any slight throttle movement causes it to attempt to reverse some or all of these actions. If you have the MDS "ON" light you can see when the MDS cycles, and feel when some of the other actions occur. I have the Superchips tuner which has pretty much eliminated the problem by modifying the shift schedule and MDS parameters. I run the 91 tune. I also have a Dash Hawk on order. With that I'll be able to further monitor engine and trans. activities. I've got it on my Hemi Magnum and it's a must, IMO.
__________________
Reply With Quote
  #7  
Old 12-31-2009, 09:33 PM
HEMIBeast's Avatar
Senior Member
 
Join Date: Sep 2009
Location: MA
Posts: 3,248
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5296
HEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond repute
Re: Dead-spot in gas pedal on my '05.....

He has an 05 and there's no MDS light that shows when MDS is engaging. The problem isn't the transmission going nuts. It is MDS engaging.
__________________
JEEP GC Limited 5.7
[SIGPIC][/SIGPIC]
180訊stat,Flyin Ryan ported throttle body,Bwoody CAI,MHP CMR Tune Predator 7137,Billet tech catch can,Dynomax muffler, AR Headers,5" blk tips,CF Rammedic Hood,SRT8 Exterior,SRT8 Rails,SRT8 Grille,Custom headlight covers,Tinted Tails (Red03SilSS),Tinted windows, painted mirror covers, Painted & Shaved door Molding,Mopar Rear spoiler,painted black calipers,Black housing headlights with LED Halo's & controller,8000K H.I.D,Reverse H.I.D,20" Black SRT8 rep wheels,Falken Ziex 275/45/20,Addco Front Sway bar,SRT8 Rear sway bar,H&R Springs,SRT8 shocks,Leather Armrest,SRT8 pedals,SRT8 Shift knob,Colored cupholder,2 pod A pillar w/ Gauges,etc..
Parts awaiting install Spartan Cam, 09 Intake manifold, etc.
Reply With Quote
  #8  
Old 12-31-2009, 09:49 PM
Hitchhiking
My Jeep: 2005 3.7L WK
 
Join Date: May 2009
Posts: 0
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
iJeep is an unknown quantity at this point
Re: Dead-spot in gas pedal on my '05.....

One word, autostick.
__________________
Reply With Quote
  #9  
Old 12-31-2009, 10:18 PM
sanitarium16's Avatar
Member
My Jeep: 2014 3.6L WK2
 
Join Date: Jun 2009
Posts: 195
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 2109
sanitarium16 is on a distinguished road
Re: Dead-spot in gas pedal on my '05.....

same issue with my 4.7. They have a TSB for this and i had it done but it still does it just not as bad. I had superchips apply this TSB to my tune as well.
__________________
2014 Jeep Grand Cherokee Altitude
Reply With Quote
  #10  
Old 12-31-2009, 10:20 PM
HEMIBeast's Avatar
Senior Member
 
Join Date: Sep 2009
Location: MA
Posts: 3,248
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5296
HEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond repute
Re: Dead-spot in gas pedal on my '05.....

Is the TSB on the 5.7's as well? I haven't seen it.
__________________
JEEP GC Limited 5.7
[SIGPIC][/SIGPIC]
180訊stat,Flyin Ryan ported throttle body,Bwoody CAI,MHP CMR Tune Predator 7137,Billet tech catch can,Dynomax muffler, AR Headers,5" blk tips,CF Rammedic Hood,SRT8 Exterior,SRT8 Rails,SRT8 Grille,Custom headlight covers,Tinted Tails (Red03SilSS),Tinted windows, painted mirror covers, Painted & Shaved door Molding,Mopar Rear spoiler,painted black calipers,Black housing headlights with LED Halo's & controller,8000K H.I.D,Reverse H.I.D,20" Black SRT8 rep wheels,Falken Ziex 275/45/20,Addco Front Sway bar,SRT8 Rear sway bar,H&R Springs,SRT8 shocks,Leather Armrest,SRT8 pedals,SRT8 Shift knob,Colored cupholder,2 pod A pillar w/ Gauges,etc..
Parts awaiting install Spartan Cam, 09 Intake manifold, etc.
Reply With Quote
  #11  
Old 12-31-2009, 10:25 PM
HEMIBeast's Avatar
Senior Member
 
Join Date: Sep 2009
Location: MA
Posts: 3,248
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5296
HEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond repute
Re: Dead-spot in gas pedal on my '05.....

2005-2010 TSB

http://www.wkjeeps.com/wk_tsb.htm
__________________
JEEP GC Limited 5.7
[SIGPIC][/SIGPIC]
180訊stat,Flyin Ryan ported throttle body,Bwoody CAI,MHP CMR Tune Predator 7137,Billet tech catch can,Dynomax muffler, AR Headers,5" blk tips,CF Rammedic Hood,SRT8 Exterior,SRT8 Rails,SRT8 Grille,Custom headlight covers,Tinted Tails (Red03SilSS),Tinted windows, painted mirror covers, Painted & Shaved door Molding,Mopar Rear spoiler,painted black calipers,Black housing headlights with LED Halo's & controller,8000K H.I.D,Reverse H.I.D,20" Black SRT8 rep wheels,Falken Ziex 275/45/20,Addco Front Sway bar,SRT8 Rear sway bar,H&R Springs,SRT8 shocks,Leather Armrest,SRT8 pedals,SRT8 Shift knob,Colored cupholder,2 pod A pillar w/ Gauges,etc..
Parts awaiting install Spartan Cam, 09 Intake manifold, etc.
Reply With Quote
  #12  
Old 12-31-2009, 10:27 PM
HEMIBeast's Avatar
Senior Member
 
Join Date: Sep 2009
Location: MA
Posts: 3,248
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5296
HEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond reputeHEMIBeast has a reputation beyond repute
Re: Dead-spot in gas pedal on my '05.....

That TSB is for the 4.7 not the 5.7.

18-004-0902/06/09FLASH: HESITATION FEEL BETWEEN 38 TO 45 MPH (4.7L)
(superseded by 18-004-09b dated 10/30/09) X 18-004-09a04/01/09FLASH: HESITATION FEEL BETWEEN 38 TO 45 MPH (4.7L)
(superseded by 18-004-09b dated
__________________

__________________
JEEP GC Limited 5.7
[SIGPIC][/SIGPIC]
180訊stat,Flyin Ryan ported throttle body,Bwoody CAI,MHP CMR Tune Predator 7137,Billet tech catch can,Dynomax muffler, AR Headers,5" blk tips,CF Rammedic Hood,SRT8 Exterior,SRT8 Rails,SRT8 Grille,Custom headlight covers,Tinted Tails (Red03SilSS),Tinted windows, painted mirror covers, Painted & Shaved door Molding,Mopar Rear spoiler,painted black calipers,Black housing headlights with LED Halo's & controller,8000K H.I.D,Reverse H.I.D,20" Black SRT8 rep wheels,Falken Ziex 275/45/20,Addco Front Sway bar,SRT8 Rear sway bar,H&R Springs,SRT8 shocks,Leather Armrest,SRT8 pedals,SRT8 Shift knob,Colored cupholder,2 pod A pillar w/ Gauges,etc..
Parts awaiting install Spartan Cam, 09 Intake manifold, etc.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Do you have the SRT pedals and now want a dead pedal to match? Scottina06 Interior/Exterior/Visual 22 04-06-2011 02:23 PM
What new mods can you spot on my SRT8? QBNKID Visual Modifications 47 11-05-2009 05:41 PM
4.7L gas mileage... Bigdiesel74 Performance Modifications 15 10-22-2009 09:58 AM
Citgo gas SUX Jeep95XJ Grand Cherokee - WJ 13 10-15-2009 03:11 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 12:57 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community