I don't think it's a placebo affect. I grounded mine this weekend...along with installing a DIY air intake and cleaned the TB. I can definitely tell a difference in throttle response. Whether it's all from grounding the TB, I don't know, but the throttle lag is gone for sure.

 

its fairly recently discovered only because fly by wire throttle bodies are fairly new. i knew about track guys with newer fly by wire cars doing it for better times but didnt think to do this until i read that when hammer did it his idle smoothed right out. my father in laws 2005 ram has always had a bad idle i could never figure out and this fixed it. response is also better than before.

 

I posted a thread last night about 2 issues I have been having with my truck (stalling at stops and a thump sensation when taking off from a stand still). After reading through this entire thread and seeing Hammer's suggestion of trying this solution to solve the stalling issue, I decided to give it a shot.

I used 12 gauge wire and have since driven the truck about 60 miles hitting as many red lights and stop signs as I could, the entire time purposely trying to create the "thump" and to get the truck to stall.

Not once did the truck stall or even surge and catch itself from stalling. After stalling several times in the last few days, this is a good sign. This was all driving at night at 70 degrees, so far so good, but time will tell better.

Although I have never had a really rough idle or a fluctuating tach, there was a difference from the drink in my cup holder. Any time prior to this you can always see waves of soda moving around in my cup and since this grounding of the TB, the liquid is extremely still with no waves at all (my only way to tell a difference in actual idle).

What shocks me quite a bit is the "thump" I previously mentioned. The best way I can think to explain this is that it feels like a lag between the transfer of power from the motor to the wheels. You press the gas from a stop, you feel a thump and a fraction of a second later the truck moves. This thump was very noticeable. After grounding the TB this "thump" has diminished to a thump that is only noticeable if you are actually trying to get it to thump. It is barely there at all. I drove 60 miles thinking that it was just wishful thinking, but this was the kind of a change I have become so used to feeling as well as a very noticeable problem that just all but disappeared.

Reading some other threads, people were posting that it was not the ground wire that was making the difference but the resetting of the PCM and people attributing the gains to something unrelated. Under any other situation I would have disconnected the battery when dealing with any electronics, but because I read this I wanted to see if the wire did anything at all so my PCM was not reset by fuse or battery.

I just wanted to share my experience so far, I will keep my fingers crossed that this fixed the stalling for good, but we will see after I drive it some more.

 

My idle was smooth ..not much of a change there..but I can tell the difference in throttle response and the slight change in tranny firmness..most noticeable on 1-2 shifts on mine.

 

I'll get around to trying it eventually. I never seem to remember to do it when I have the free time. I've always got the wire & connectors on hand.

I can't imagine how I will gain anything -- my idle is solid and I have great throttle response. There's nothing I could complain about regarding my engine's operation.

 

i did this over the weekend as well as made an cold air intake and also was looking at my exhaust on my 06 qc hemi and noticed there's two mufflers and also a resonator so i took one muffler off and the resonator and can tell a difference in better throttle response. but my mpg dropped /: anyone know why?

 

More air in = more fuel required.

 

Grounded mine about a week ago and seamfoamed as well. Truck is running very nice. I def notice a little better response. Shifting is about the same. Used 10ga wire to the battery ground. Definitely notice a rock solid idle.

 

So I guess the 2002 is the problem child odd one out of the bunch.....No word on it yet, so I'll give it a go. Will have spent more time reading this thread than working on it. I have an aftermarket TB, and it is metal, but I have the 4.7, so I'm not sure if it is fly by wire....It has a wire running to it, but until I pump the gas with it turned off and have someone watching the cable, I won't know. Regardless, I have a slightly shaky idle and some shifting mushyness, will post back results in a few hours.

EDIT: Ok so I my TB is stock, just my spacer is aftermarket.....lol, so any ways, it is fly by wire, so I will be heading to pick up some battery cable soon. Bad news is my 2007 mustang gt is electronically driven, so no upgrading there =(.

 

It's easy to spot a non electric Throttle Body. Just look for a 1/4 diamater black tube that does not bend easily attatched to your throttle body. At the end of the tube, you will see a silver steel cable coming out attatched to the side of the Throttle Body. It will look nothing like an electrical connector. You can also just step on ther gas pedal with the truck off. You can feel the lack of a cable easily with your foot.

When you ground the Throttle Body, take off that Spacer and throw it in the garbage. It does nothing. I used 12 gauge wire and ran it to the chassis ground coming off the battery. Noticed an instant difference.