What a difference a full tune up makes (WJ) - JeepForum.com

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post #1 of 17 Old 12-07-2006, 12:30 AM Thread Starter
RobertTF
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What a difference a full tune up makes (WJ)

I decided to take it upon myself to do a full service on my WJ instead of paying ridiculous amounts of money to take it to the dealer. Here is a list of everything I did and then my conclusions.

- Bosch Platinum Spark Plugs: 4230 (The old Champion Coppers had eroded to a gap of .047 compared to the stock .04)

- Valvoline Max Life 10w-30

- Purolator PureONE oil filter

- Royal Purple 75w-140 Synthetic in the Diffs (plus half a bottle of FM in each)

- Valvoline ATF+4 Synthetic Transmission Fluid (changed the two filters as well)

- Mopar Transfer Case Fluid

- Bored out the throttle body and cleaned it (Removed it, used the dremel to bore it out a bit, polished it up, ground down the protruding screws on the butterfly, filed down the tab sticking down at the 12 o'clock position on the intake manifold, and cleaned it up nice and good)

- Bled the brakes

- Greased up the disconnects and addco bushings

After first turning the engine over, I noticed immediately that the idle was much smoother and it seemed to be running a lot better. I decided to take it for a drive around town and on the highway. Brakes were a lot more responsive (I think I had some air in the lines), engine was much more responsive and acceleration was smoother, and last but not least, MPG went up dramatically! I went from an average of 14.5mpg to 17.1mpg! I drove for about 45 minutes (15 around town and 30 on the freeway). The freeway was half 63mph and half 73mph. I think everything is running a lot more efficiently and the old plugs aren't burning excessive fuel anymore. I'd have to say that this is one of the best things that I have done yet to get it running better. I think I spend maybe $200 total in parts and fluids.


2001 4.7l Limited WJ
IRO 6.5" Critical LA, Lonestar Incline Bumper, XRC-8000 Comp Winch, 33" BFG All-Terrains, and a long list of other stuff.
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post #2 of 17 Old 12-07-2006, 02:00 AM
10achik
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It's nice to show some love to the Dub. I usually keep mine regularly maintained, but do the main tune-ups in the late spring, I hate working on it when it's 20* or 100*. Since I can't get it in the garage anymore, I'm at the mercy of the weather. I've got a new clunk to check out now, but I aint working on it in the driveway right now that's for sure, it's about 18* and about 2" of solid ice out there...suck

Ken

99 GC Limited - 4.7L HO V8, 6.5" IRO HC LA lift, F&R D44s locked & trussed, 242HD, IRO TC Skid, KMA Bumper, 35's
2006 Saturn Redline -2.0L Eaton supercharged I4, GMPP Stage 2, Custom Tune, AEM CAI, Ebiach Pro Kit w/ swaybars, EVO Ventus V12s (13.76 @ 103.85)
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2000 SV650 - naked, integrated tail light, sliders, corbin, pilot roads, RK chain & sprokets, D&D full exhaust, FactoryPro Stage I jet kit, +4 Ignition Advancer, Barnett race clutch
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post #3 of 17 Old 12-07-2006, 03:21 AM Thread Starter
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I always change the oil every 3,500 - 4,000 miles and had a big service maybe 15k miles ago. Just decided that I would go to synthetics besides motor oil. When you treat the dub jay right it shows you the love in return. How is the 5.5" IRO lift working out for ya? How do those 32's look under it? I am probably going to end up with the 5.5" IRO LA setup when it comes out. I'm trying to determine whether I am going to get the 32 or 33" Bighorns. How are they working on the ice and snow for you? We just finished up with our snow storm and its almost all gone. Probably the only snow we will see all season. 15" of snow in one night. I think that has to be some record for us.

2001 4.7l Limited WJ
IRO 6.5" Critical LA, Lonestar Incline Bumper, XRC-8000 Comp Winch, 33" BFG All-Terrains, and a long list of other stuff.
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post #4 of 17 Old 12-07-2006, 08:10 AM
RBall151
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Quote:
Originally Posted by RobertTF
- Royal Purple 75w-140 Synthetic in the Diffs (plus half a bottle of FM in each)
What is FM? I'm drawing a blank..

2001 WJ I6 Steel Blue Pearl Coat | 2" BB : MX-6 Shocks : 245/75/16 Bridgestone Dueler AT's
Silverstars : K&N FIPK2 : 42RE : Dana 35C : 3.73 Ratio
Cliff Designs 3.2LX : Fosgate 12" HX2 | Infinity Reference 3012cf 3.5" Dash Speakers
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post #5 of 17 Old 12-07-2006, 08:13 AM
BlaineWasHere
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I am doing plugs in the spring fosho... I am sure the dub needs it. She does run smooth as of now though.

Sence I use ful syn motor oil I am pumped I don't have to change the oil all winter!!!

2013 FR-S
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post #6 of 17 Old 12-07-2006, 09:32 AM
hinchcliffe
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It's nice to give the dub some love instead fixing something wrong with it. Plugs and maybe tires come spring. Everything else should be upto snuff. NIce.

'06 XK Inferno Red Crystal Pearl/Gray Leather
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post #7 of 17 Old 12-07-2006, 09:34 AM
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Quote:
Originally Posted by RBall151
What is FM? I'm drawing a blank..
FM = friction modifier
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post #8 of 17 Old 12-07-2006, 12:27 PM
Arkansas_WJ
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Quote:
Originally Posted by Wheelin98TJ
FM = friction modifier
quadra drive only mind you

Mitch

2000 WJ Limited - 4.7l, 4x4, pioneer HU w/ ipod interface, upgraded front calipers, yakima lowrider system, uniden cb w/ 4 ft firestick, 3.5" tweeter upgrade
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post #9 of 17 Old 12-07-2006, 02:31 PM
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Quote:
Originally Posted by Arkansas_WJ
quadra drive only mind you
the vari-lok(c?) requires the FM also
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post #10 of 17 Old 12-07-2006, 02:51 PM
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vari-lok is a part of quadra-drive

Anyway, yeah, good oil=good MPG, tested myself
I'm also thinking about boring TB, but I have one doubt about it- is it hard to adjust all the linkage after installing it back to its place? Because this is the thing I'm afraid most :/

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Anyway, nothing will beat Suzuki :D
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post #11 of 17 Old 12-07-2006, 03:04 PM
///BHRpowered
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no vari-loc is the quadra-drive, but I believe the trac-loc quadra-trac2 systems highly recommend it.

The only thing I haven't done on my Wj yet is the tranny flush and diffs, hopefully doing the diffs this weekend

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post #12 of 17 Old 12-07-2006, 03:12 PM
Wheelin98TJ
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Quote:
Originally Posted by Arkansas_WJ
quadra drive only mind you
Quote:
Originally Posted by ///BHRpowered
no vari-loc is the quadra-drive, but I believe the trac-loc quadra-trac2 systems highly recommend it...
If you have a Trac Lok diff, you definitely need the friction modifier.

Its not just the QuadraDrive WJs that need the FM.
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post #13 of 17 Old 12-07-2006, 03:13 PM
10achik
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Quote:
Originally Posted by RobertTF
How is the 5.5" IRO lift working out for ya? How do those 32's look under it? How are they working on the ice and snow for you?
Man I love this kit, it's been great, although I've got a new clunk I'm trying to figure out at the moment but it's to cold to work on it. The 32's look fine but I'm definately going to 33's as soon as these are worn out or sooner if I get some extra cash. These Bighorns are absolutely the best tires I've ever run in every condition.

I'll go ahead and let the cat out of the bag here since a few people know already, but I've been working on a deal with IRO to test and run their 5.5" Long Arm setup. I'm only going to run the front for now, but will eventually run the back as well. They have been testing it on their Shop WJ and made me a deal to run it on mine, so hopefully soon I can get it and get started on it.

Ken

99 GC Limited - 4.7L HO V8, 6.5" IRO HC LA lift, F&R D44s locked & trussed, 242HD, IRO TC Skid, KMA Bumper, 35's
2006 Saturn Redline -2.0L Eaton supercharged I4, GMPP Stage 2, Custom Tune, AEM CAI, Ebiach Pro Kit w/ swaybars, EVO Ventus V12s (13.76 @ 103.85)
2006 Pontiac G6 GTP
2012 Nissan Juke - (hers)
2000 SV650 - naked, integrated tail light, sliders, corbin, pilot roads, RK chain & sprokets, D&D full exhaust, FactoryPro Stage I jet kit, +4 Ignition Advancer, Barnett race clutch
2006 Triumph America 900 - Full Dresser

January 2009 Grand Cherokee of the Month (GCOTM)
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post #14 of 17 Old 12-07-2006, 03:27 PM
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WJ's came with trac lock?

i thought just vari

Mitch

2000 WJ Limited - 4.7l, 4x4, pioneer HU w/ ipod interface, upgraded front calipers, yakima lowrider system, uniden cb w/ 4 ft firestick, 3.5" tweeter upgrade
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post #15 of 17 Old 12-07-2006, 03:33 PM
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Nope, trac-lok was also available, but rather rare- if someone wanted traction he just bought quadra-drive. If he didn't- why bother with any LSD then

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Anyway, nothing will beat Suzuki :D
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