Just try a tank, of 93 made a big difference in mine

 

WannaV8, just tried the 6th gear thing you recommended. Yes, that helped. I also found out something that all the rest of you probably already know. When you put your D in tow/haul mode, not only does the car not go into eco mode, it also stays in 5th gear at freeway speeds keeping the engine spinning at 2000 rpm at 60 mph. The engine is much happier at that rpm. And yes, the fuel economy is worse.

 

Red Rhino-glad that helped a bit. I've noticed that although the switching back and forth from 4 to 8 to 4 cyl. is pretty seamless, when I apply a very light throttle to accelerate it feels like it stumbles a bit. Full throttle of course solves that in a hurry, but sends me to the gas station a lot faster!

 

I second the 89 or 93 octane gas. I was on empty today and filled up with 93 Shell. Just came back from a 100 mile trip and the D felt great on part throttle, incline grades and passing.

 

I have recently found the same stumble at light throttle. Just felt it for the first time a few days ago. Not sure why it took so long to notice it.

I'm gonna try the higher octane next fill up. Using 89 now.

 

I agree with the 93 octane now with winter blends, But in the summer using 89 should be fine
STEVE

 

ready to order email sent

 

My Volant cold air intake arrived and I installed it over the week-end. This is a very quality kit with excellent form and fit. Everything is customized to fit perfectly in the Durango engine bay and when installed does not look like an add on. Much better than the K&N and Mopar CAI in this regard. I can't say the upgrade of the air intake has resulted in improved performance. I couldn't really tell by the seat-of-the-pants test and it definitely isn't as obvious an improvement as the Hypertech. Also, there is no noticeable sound difference while driving conservatively. But, put your foot into the throttle and the sound of the V8 gulping air through the new air intake sounds awesome! My gas mileage has gone to crap because I keep flooring the thing!

I also received the replacement for my faulty throttle module from Hyertech. For those that don't know, the Hypertech comes with two separate harnesses: One that is installed under the hood and a second inside the cabin at the gas pedal. My throttle module was defective and quickly replaced. Having installed the Hypertech kit in two stages really gave me an opportunity to see what each did. The engine module definitely helped with performance as I wrote in an earlier post. The throttle module increased throttle sensitivity some, but also gave the throttle a more natural linear response instead of the weird factory map that required a lot more throttle pedal movement initially to make anything happen. I don't think the throttle module actually created any performance gains, but did increase the drivability of the car.

So, in summary, for the biggest bang for the buck, go with the Hypertech Interceptor for between $260 - $300. A great investment. As previously stated in this thread, there are other options as well such as the Diablo, but the Hypertech met my needs. The Volant CAI looks and sounds great, just not sure what kind of performance gains are being realized. The combination of the Hypertech and CAI have hurt my gas mileage, just because I can't keep my foot out of it.

After my checkbook recovers from Christmas, I plan to install a Flowmaster exhaust to compliment the breathability of the new CAI, improve the sound quality, and reduce weight by getting rid of that big "suitcase" sitting midway back in the exhaust system. What is that, anyway? A big resonator?

 

Diablo ordered cant wait to see results
STEVE