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

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 03-21-2011, 06:18 PM
Member
 
Join Date: Mar 2011
Posts: 50
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1278
Eurotrash is on a distinguished road
sputtering feeling at lower rpm's around 50-60mph....

I've had my 05 jeep limited almost two months now and its got around 85k miles on the 5.7L. When cruising along around 1500rpm it had a bit of a "sputter" in the 50-60mph range. what do you guys think? Plugs? Also is barely gets 18mpg on the highway. That seem normal? Or should I get a little better? That's another reason I thought it may need some new plugs.

If that's the case what plugs do you guys recommend? "
__________________

__________________
[SIGPIC][/SIGPIC]
Reply With Quote
  #2  
Old 03-21-2011, 07:40 PM
Member
My Jeep: 2006 5.7L WK
 
Join Date: Dec 2009
Location: Home of the Mountain Blue Bird
Posts: 975
Thanks: 0
Thanked 18 Times in 16 Posts
Rep Power: 154839
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: sputtering feeling at lower rpm's around 50-60mph....

If you just bought it and don't know the maintenance history, IMO, you should just do a complete major service/inspection. Include all fluids/oils/filters, antifreeze change, spark plug, spark plug wires, EGR Valve, MAP Sensor, PCV Valve (also clean behind the throttle body butterfly and buy a catch can), and if that doesn't significantly improve the mileage, also change all the O2 Sensors. That's what I did with mine when I bought it with 48K on it. I didn't have a bad mileage problem though, so didn't do the whole enchilada until 60K. I changed the EGR Valve at 54K (failed) and did the O2's a little after the 60K service, because one was failing and one was getting "lazy". A major service will run you about $500 in parts (fluids/oils/filters, etc.) if you do it all yourself. If you take it somewhere else, make sure you watch them like a hawk. Many dealers (including mine) don't even know how to service them properly.
__________________

__________________
05 LX/RT & 06 WK/GCO, modded similarly, MDS "ON" Light, Vortex Gens, Debadged, DashHawk, BT Catch Can, SRT CAI W/Add Air Inlet, K&N Filter, Sonnax Trans Press Booster, SC Tuner W/Adv Trans Tuning App, DS Tuner, Cust tube headers w/3 in. catback, Bilsteins, SRT frt/rear bumpers, Eibach SRT Lwr Sprgs & Sways, FRI Sidewinder Cam Adv 2*, 6.1 valvetrain, SLP 25% UD Pulley, BBK 90mm TB, SOS Coils/.060 plug gaps. 20 in. SRT Reps.
Reply With Quote
  #3  
Old 03-21-2011, 07:50 PM
Member
 
Join Date: Mar 2011
Posts: 50
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1278
Eurotrash is on a distinguished road
Re: sputtering feeling at lower rpm's around 50-60mph....

Good idea. Not looking to spend that much right off but may do the main things then do the rest soon after. It showed on the car fax that all the services were done but like you said the dealerships cut corners. I know I used to be a ford tech. - personally didn't cut corners but seen it done way too often. If I don't do the work myself which I probably will I will have a friend that is still a tech do it for me or at least help me do it all.


That isn't a mds engine correct?
__________________
[SIGPIC][/SIGPIC]
Reply With Quote
  #4  
Old 03-21-2011, 10:09 PM
Member
My Jeep: 2006 5.7L WK
 
Join Date: Dec 2009
Location: Home of the Mountain Blue Bird
Posts: 975
Thanks: 0
Thanked 18 Times in 16 Posts
Rep Power: 154839
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: sputtering feeling at lower rpm's around 50-60mph....

I hear you. I prioritized mine and acquired everything a little at a time over about 2-3 months. Wasn't as painful that way. Once I gathered everything up, I just started picking away at it over about a two week period. Would have been much quicker, except for the crappy weather.
__________________
05 LX/RT & 06 WK/GCO, modded similarly, MDS "ON" Light, Vortex Gens, Debadged, DashHawk, BT Catch Can, SRT CAI W/Add Air Inlet, K&N Filter, Sonnax Trans Press Booster, SC Tuner W/Adv Trans Tuning App, DS Tuner, Cust tube headers w/3 in. catback, Bilsteins, SRT frt/rear bumpers, Eibach SRT Lwr Sprgs & Sways, FRI Sidewinder Cam Adv 2*, 6.1 valvetrain, SLP 25% UD Pulley, BBK 90mm TB, SOS Coils/.060 plug gaps. 20 in. SRT Reps.
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
"shifting" noise/feeling from the lumbar support cladd Trouble Shooting/Problems/Service 2 08-28-2011 07:58 AM
Official 0-60mph numbers? JEEPSRT Grand Cherokee - WK2 - 19 10-28-2010 07:24 PM
Zero Oil Pressure @ idle but ok when over 2000 rpm's MALLOPPO Troubleshooting/Problems 3 02-22-2010 12:59 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 10:05 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