engine ground mod

[ILMP5]

Hey guys and gals I found this mod on a WRX forum. Wonder if this works on our rides. They seem to talk about it being done on a RX-7 etc. etc. Feedback people.

here's a clip from thier thread:





I just completed the 'grounding mod'. Man, what a difference!

My WRX had a bad stumble or hesitation between 4 and 6,000 rpm even when fully warm. After adding several ground wires the stumble is gone!

I added 5, 12 gauge, THHN ground wires: one to each strut tower, one to each side of the intake, and one to the firewall. The last 3 are existing factory ground points. All 5 wires terminate at a two-piece solid copper lug on the neg. battery terminal. I used "Copper Shield" anti-oxidant on all connections. Also, I found that the factory ground at the firewall was done over painted metal (lame), so I cleaned that up.

I am amazed at the difference this mod made. I was skeptical but figured the cost was minimal and I had nothing to loose.

 

[derrick1623]

i saw something like this at the car show...a central grounding location so you don't have ground wires all over the place. it was a single ground that split into like 6-7 other grounding posts.

 

[ILMP5]

here's a reasoning from i-club. dont really know if this would work on our cars???? im going to give this a try, its cheap wont hurt to try it out!

O.k. this is sort of a shot in the dark, but the reason the ground mod fixes the problem of the stumbling. Is that when the air passes thgough the throttle body it creates a staic charged that possibly might screw with the signials coming out of the TB's sensors. I used to be a DSM guy and the 4G63 had a little thing that connected the TB to the rest of the engine to ground it. Took me and a friend a while to come up with a reason for having this little metal thing for no reason. I feel this same thing is comparable to the WRX grounding MOD.

 

[ILMP5]

heres a the thread from i-club read for yourself.

http://www.i-club.com/forums/showth...threadid=141932