[JeepEngineers]

Originally Posted by 2005X

after being on this website for 3 years, it seems that everyday someone ask the question about cold air intakes an how they add HP, MPG, could you please explain why this does not work on a TJ. i would like to use your answer when replying back to the people that ask.

As with any "system" on the vehicle, such as the air induction system, there is a certain amount of compromise that needs to be designed into it. What I mean is that you could maximize flow, but at what cost to filtration and protection of the engine? Essentially we design the stock intake system to meet the airflow requirements of the engine while still protecting it from fine particle ingestion. Will a cold air intake possibly flow a little more? Perhaps, but it may potentially allow larger particles through that the stock paper element would not.

In the case of the TJ, the 4.0L is an engine optimized for low RPM power and torque - the potential increase in airflow that a cold air intake might offer would not really play into the typical RPM range that a 4.0L generally operates in.

[JeepEngineers]

Originally Posted by xdownfornowx

Really, we all would love a diesel option. Any word if the Mopar team is getting any closer to finishing the TJ diesel swap kit we were drooling over back in May?

There are still integration, commercial, and regulatory issues to resolve - you will hear about it as soon as there is anything to report!

We can say that it is a pleasure to drive in Moab both on and off-road at higher altitudes and even around town in Detroit near sea level.

Have we mentioned that we love diesels?

[JeepEngineers]

Originally Posted by Dubya

My 07 Rubi soft top leaks on both sides over the door handles. I have had it in to the dealer 5 times now, and none of the things they have done has amounted to a hill of beans. They even repeated a TSB to add some foam weather stripping. Nothing helped, and this is a well known problem.

Someone on another forum reccommended adjusting the sport bars so that they are closer to the doors, thus giving a tighter fit to the door. Does this sound plausible? Is it possible to move the bars (specifically the section next to the door) laterally?

Thanks!

I am sorry that the dealer is unable to fix it but I have a suggestion. Based on what you are describing the vehicle is missing a piece of foam that goes on the door rail at the A-pillar. I recommend when you take it to the dealer again tell them to contact the STAR center and have them contact engineering and we can walk the dealer on how to repair it.

[Dubya]

4 Wheel Drive and Sport Utility magazine claimed the following on their blog back in April:

"Also available soon will be complete front and rear half door kits that come complete and ready to paint. You’ll no longer have to go through the dealer’s part’s screen trying to figure out every little piece needed to put together half doors for your JK."

Is this true and if so when can we expect them, and at appoximately what price?

[Mayfair_Jeeper]

Hey. I just installed the Mopar 03-06 TJ Hard top wire harness. When I was installing, the male pin that plugs into the4 black harness under the drivers kick panel broke. Where can I get a replacement? I have tried just about everywhere, including the dealer. Thanks!

[JeepEngineers]

Originally Posted by 2005X

after being on this website for 3 years, it seems that everyday someone ask the question about cold air intakes an how they add HP, MPG, could you please explain why this does not work on a TJ. i would like to use your answer when replying back to the people that ask.

In theory, cold air will be better. But, on a vehicle actually travelling down the road, the flow of air is actually way different than most assume. Air is actually pushed, like a wave of water, up and over the vehicle. This does not push air into the cold air inlet. TJ = aerodynamic "BRICK"

Often, with a "Cold Air" system, folks think the engine is getting fresh cold air, when in fact, it's sucking the same underhood hot air as before.

Cold, dense air is good - but sometimes hard to get. The TJ intake is up high for water ingestion, not the best for cold air btw.

[JeepEngineers]

Originally Posted by Matt08jk

Oh and another...since it is a slow start...

When I start up my Unlimited Sahara after at least 12 hours, I can hear a 1-3 second long subtle rattling sound that is quite remenicent of an oiling system that lags behind. Are you aware of issues with oil filtration systems draining back during non-use?

It could be a cold start routine that retards spark. It happens after 12 hours.

[JeepEngineers]

Originally Posted by mdls4

Boy would I love to take it over there and show you what I'm talking about! The sound is definitely underneath the vehicle, almost directly under the shift stick.... or perhaps in the engine bay. Maybe one day I'll upload a video to Youtube, if I can get decent audio from it.

One other item to look at is to see if the lower shift boot below the beauty cover boot is not fully seated. If it is not then you could be hearing the transmission during the shift operation.

[JeepEngineers]

The 1/2 door kits are still in development. They will be available by the new year. The kits will be 2 front doors in a box, and all of the components. price will be just under a grand for a pair of doors. Dealers may discount this price. You will have to paint the doors, but they will be primed. We will also have kits for the upper soft windows, and for the rear doors. We have been delayed getting product out for the new ram truck.

[xdownfornowx]

Originally Posted by JeepEngineers

There are still integration, commercial, and regulatory issues to resolve - you will hear about it as soon as there is anything to report!

We can say that it is a pleasure to drive in Moab both on and off-road at higher altitudes and even around town in Detroit near sea level.

Have we mentioned that we love diesels?

Phhbbbtt! Show-offs! Well, thanks for the hard work guys. It's just tough for some of us as it looks like diesel is finally about to break through in America in vehicles besides heavy duty trucks. I'll go back to patiently waiting know that I know the project isn't dead.

[jay-h]

since it's quiet, I'd just like to say thanks for your time to visit and answer questions.

Since I have nothing like a JK (YJ and CJ2A) I'm sort in in voyeur mode...

[JeepEngineers]

Originally Posted by jay-h

since it's quiet, I'd just like to say thanks for your time to visit and answer questions.

Since I have nothing like a JK (YJ and CJ2A) I'm sort in in voyeur mode...

Uh, we must be voyeurs too - most of us own a few Jeeps. I know of a couple of YJs in our group.

Not just Engineers, we are customers too . . .

[JeepEngineers]

Would you JK Hardtop owners like to see a headliner made available? A thick soft formed kit that covers the interior of the hard top and sides.??

[JeepEngineers]

Originally Posted by jay-h

since it's quiet, I'd just like to say thanks for your time to visit and answer questions.

Since I have nothing like a JK (YJ and CJ2A) I'm sort in in voyeur mode...

The YJ is still a Wrangler! There are a few of those still kicking around in our personal off-road fleets - and a few CJ's too. We can take a shot if you have questions on 'em. Some of the guys that were around to work on CJ's have retired to go 'wheeling full-time now.

[Matt08jk]

Are you able to tell me if I have 2 sets of wheels, am I able to switch out the set anytime? or can only 4 specific wheel sensors be programmed at one time for the vehicle.