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Search: Posts Made By: jeepgcoman
Forum: Engine Performance/Intake/Exhaust 06-29-2015, 09:19 AM
Replies: 13
Views: 952
Posted By jeepgcoman
Re: diablo intune

X at least 3 on this. A CMR tune for a non-modified or slightly modified Hemi is one of the worst bangs for the buck you can get. If you have a highly modifed (much more than mine....see signature)...
Forum: Engine Performance/Intake/Exhaust 06-19-2015, 10:24 AM
Replies: 6
Views: 431
Posted By jeepgcoman
Re: 6.1 swap

Over about the past six years, I've spent about $6K doing mods. on mine, and have gained nearly 100 more horsepower. Only about half of that was spent on the engine/drivetrain though. My engine was...
Forum: Grand Cherokee - WK 05-05-2015, 11:36 AM
Replies: 24
Views: 20,584
Posted By jeepgcoman
Re: So who needs a starscan tool when you can get this....

I see this is a pretty old thread but, since then, there is newer/better computerized diagnostic scanners available. I got tired of just being able to read and clear codes and wanted something that...
Forum: Engine Performance/Intake/Exhaust 05-03-2015, 06:54 PM
Replies: 1,304
Views: 82,229
Posted By jeepgcoman
Re: 3.7l performance love

Jeff, I think you need to get a shift kit for that NAG1. Sounded like some pretty sloppy shifts. And, while you're at it, get a Mercedes pan to put on the tranny too. It'll make the fluid/filter...
Forum: Engine Performance/Intake/Exhaust 04-18-2015, 09:53 AM
Replies: 14
Views: 804
Posted By jeepgcoman
Re: I hate how my Jeep shifts

You've sure got that right. The best way I've found to fix it, without tearing down the transmission, is to add the Sonnax Line Pressure Booster and purchase a Superchips Tuner with the Advanced...
Forum: Grand Cherokee - WK 04-12-2015, 10:02 AM
Replies: 29
Views: 6,353
Posted By jeepgcoman
Re: Switching to Synthetic Oil in High Mileage Engine

Like I said in my Post No. 23, with 253+K miles, it may be time to start thinking about some major engine work if you plan to keep the vehicle. For sure it's time to have someone that is...
Forum: Grand Cherokee - WK 04-10-2015, 11:15 AM
Replies: 29
Views: 6,353
Posted By jeepgcoman
Re: Switching to Synthetic Oil in High Mileage Engine

I would think that at 253K+ miles you'd probably be needing a heavier oil. What weight oil were you running with the synthetic? 5W30 seems a little light to me. Can you tell where the knock is coming...
Forum: Grand Cherokee - WK 04-09-2015, 11:13 AM
Replies: 29
Views: 6,353
Posted By jeepgcoman
Re: Switching to Synthetic Oil in High Mileage Engine

First, you're in the wrong forum. This is the later model Jeep forum. Second, check the oil level and make sure it is full. Third, look for oil leaks, as sometimes switching to synthetic at high...
Forum: Troubleshooting/Problems 12-07-2014, 08:26 PM
Replies: 9
Views: 481
Posted By jeepgcoman
Re: 2006 5.7 Trans shift problems

Just a heads up.....the Transmission Control Module (TCM) is an integral part of the Powertrain Control Module (PCM), and is only replaceable as a unit. R and R of this unit (located on the right...
Forum: Troubleshooting/Problems 12-01-2014, 11:21 PM
Replies: 41
Views: 9,172
Posted By jeepgcoman
Re: service Tire Pressure Monitoring Systems.HELP

I can't imagine that Jeep is still using the same system they had in 2005-2007 but, if they are, just have them make sure that the TPMS sensor ID numbers for each of your wheels (and spare) are the...
Forum: Engine Performance/Intake/Exhaust 12-01-2014, 09:26 PM
Replies: 19
Views: 1,884
Posted By jeepgcoman
Re: Cold air intake

IMO, that's a good decision. I am not sure but, if your airbox is the same as the 4.7/5.7's, it is capable of flowing around 700 cfm of air though it. Your 3.7 (~226 cu. in.) is only capable of...
Forum: Troubleshooting/Problems 10-28-2014, 08:52 PM
Replies: 6
Views: 399
Posted By jeepgcoman
Re: Need a picture

Road Magnet is a different brand of spring. They may be very similar though. I don't know anything about them or their quality. Eibach has been around forever and has a good rep. I used Eibach SRT...
Forum: Grand Cherokee - WK 10-12-2014, 10:07 AM
Replies: 10
Views: 647
Posted By jeepgcoman
Re: Tranny temp with scangauge on 5.7

Don't know for sure with the Scangauge, but the DashHawk has a PID for trans. temp. Only problem is that it doesn't work properly with the 545RFE. It does work properly on my Hemi LX with the NAG1...
Forum: Troubleshooting/Problems 09-30-2014, 05:19 PM
Replies: 61
Views: 1,944
Posted By jeepgcoman
Re: Tune Up

You'll be OK with the EGR Valve by doing as dmsfun says.

No, I was talking about not breaking the PCV Valve off in the housing. You'll see how easy it would be to break once you get the old one...
Forum: Engine Performance/Intake/Exhaust 09-02-2014, 07:11 PM
Replies: 4
Views: 712
Posted By jeepgcoman
Re: Recommendation 05 WK hemi

With your limitations, there is not a lot you can do. In the "old" days we used to have a cutout welded in (on the WK it must be behind the rear O2 Sensors and in front of the muffler), and either...
Forum: Engine Performance/Intake/Exhaust 09-07-2013, 10:52 AM
Replies: 11
Views: 1,394
Posted By jeepgcoman
Re: Oil plug stripped

If you've seen one of these valves, that would be almost impossible. The rock or stick would have to lift the lever and turn the valve at the same time, which in reality is a little more difficult...
Forum: Engine Performance/Intake/Exhaust 08-20-2013, 04:28 PM
Replies: 15
Views: 1,250
Posted By jeepgcoman
Re: Noob Alert - VOlant Intake Question

The coil/valve cover swap doesn't do anything except clean it up a little more and make it look like the 06's>. The only reason I am going to try to do it is because I have that extra set of late...
Forum: Troubleshooting/Problems 07-15-2013, 09:34 AM
Replies: 4
Views: 735
Posted By jeepgcoman
Re: Flat battery again..and again..and again..etc.

No, a trickle charger won't show anything. They're a good slow charge for an otherwise good battery though. If you're charging it for hours on end and all it does is heat up the battery and the...
Forum: Engine Performance/Intake/Exhaust 07-09-2013, 04:42 PM
Replies: 59
Views: 4,728
Posted By jeepgcoman
Re: Mods for the Adventurous Experimenters

Well, let's revive this old thread!! I have now added the SLP 25% UD pulley and a BBK true 85mm throttle body. Neither of these mods. appear to make much difference using the "seat of the pants"...
Forum: Engine Performance/Intake/Exhaust 03-29-2013, 05:25 PM
Replies: 4
Views: 612
Posted By jeepgcoman
Re: what exactly is mds

Right on, 08Hemi. Here's a little more info.....MDS stands for Multi-Displacement System, and there are a host of items that must be within certain tolerances for the computer (PCM) to activate the...
Forum: Interior/Exterior/Visual 10-22-2012, 03:17 PM
Replies: 15
Views: 1,963
Posted By jeepgcoman
Re: Lowered??

I have the Eibach SRT lowering springs/sways, Billsteins, and SRT bumpers on mine. We seldom have more than ~4-6 inches of snow on the ground at any time, so clearance hasn't been a problem.....so...
Forum: Troubleshooting/Problems 06-23-2012, 12:27 PM
Replies: 14
Views: 1,846
Posted By jeepgcoman
Re: 06 4.7 slightly high engine temp- i need your help

Since you did the obvious, I think I'd focus on the sensor. Probably wouldn't cost too much.

On the idle, when's the last time the EGR Valve was changed? Do you have a way of testing or at least...
Forum: Troubleshooting/Problems 06-08-2012, 08:37 PM
Replies: 15
Views: 1,280
Posted By jeepgcoman
Re: Balancer/Damper issues

I'll agree, don't remove the radiator/fan assemblies, unless you absolutely have to. They are a genuine pain in the a$$, both off and on. Are you replacing with a stock damper/pulley, or installing...
Forum: Engine Performance/Intake/Exhaust 05-16-2012, 10:47 PM
Replies: 59
Views: 4,728
Posted By jeepgcoman
Re: Mods for the Adventurous Experimenters

^^^....an almost LX motor. The pulleys are the same though.
Forum: Engine Performance/Intake/Exhaust 04-30-2012, 04:08 PM
Replies: 59
Views: 4,728
Posted By jeepgcoman
Mods for the Adventurous Experimenters

A while back on the "Official mpg" thread I indicated I'd do a thread for the more adventurous experimenters among us. I'll start by saying that, of all the mods. I've done to both of my Hemi...
Forum: Engine Performance/Intake/Exhaust 02-14-2012, 07:41 PM
Replies: 2
Views: 735
Posted By jeepgcoman
Re: Cam Swap Writeups?

I did a cam swap on my 5.7 WK and am currently in the process (about 75% done) of doing the same on my 5.7 LX. Don't know how your side (valve cover to fenderwell) clearances are with the 4.7, but on...
Forum: Interior/Exterior/Visual 11-26-2011, 05:24 PM
Replies: 20
Views: 2,258
Posted By jeepgcoman
Re: whats the best lowering "kit" for my Hemi

I use mine as the daily driver most of the time. IMO, it's a lot more fun to drive than my Hemi LX. even though it doesn't get as good fuel economy. I wouldn't hesitate to do this mod. again if I had...
Forum: Interior/Exterior/Visual 11-24-2011, 05:21 PM
Replies: 20
Views: 2,258
Posted By jeepgcoman
Re: whats the best lowering "kit" for my Hemi

I used Eibach SRT lowering springs and SRT sway bars front and rear. The shock/struts are all Billstein. Handles like it's on rails now, a little more harsh than stock, but not by any means...
Forum: Grand Cherokee - WK 10-31-2011, 06:56 PM
Replies: 6
Views: 670
Posted By jeepgcoman
Long Trip with new cam in the Hemi

I just got back from a 1600 mile trip and check run for the new FRI Sidewinder cam I installed. The low end performance hasn't changed much from stock, but the mid and top end is noticeably better. I...
Forum: Engine Performance/Intake/Exhaust 08-21-2011, 09:25 PM
Replies: 4
Views: 705
Posted By jeepgcoman
Re: Tuner stolen from Car

Report it to the DS folks. No one will ever be able to use it but you. Once DS has your S/N as stolen they won't unlock it for anyone else. Also, you'll probably have to wait and see if it turns up,...
Forum: Grand Cherokee - WK 05-19-2011, 05:43 PM
Replies: 6
Views: 855
Posted By jeepgcoman
Re: Gas Mpg

I love to tinker, so I've tried many things, both with my Hemi LX and my Hemi WK. So far I've gotten the LX up to a high of 31 mpg and WK up to a best of just over 22 mpg on the highway. Both get...
Forum: Engine Performance/Intake/Exhaust 03-15-2011, 08:21 PM
Replies: 39
Views: 10,768
Posted By jeepgcoman
Oxygen Sensors and Their Role in Engine Management--A Primer

I am doing this thread due to my recent experience with the Oxygen Sensors (O2) on my Hemi WK. I’ll explain how and why I became very interested in this, and the results of my research and actions....
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