So im going to pick up some wire and such to ground tonight. Few questions that i cant seem to find a good answer to on the forums, so for those that have grounded can i get alittle help.

The alternator ground, which bolt do i use, not that one with the red cover over it right, thats postive, do i use the adjusting bolt?

What about the pressure sensor i have a s5, 90 GTU. Does anyone that has done it remember the wire color to splice into?
thanks for the help

 

check the grounding how to thread. But In my opinion the most important wires to ground are the ones right at the ECU. There are 4 of them. check the FSM for which ones.

 

Yes, use either of the adjusting bolts on the alternator.  The alternator case is ground.

Do not bother with the ground mod for the pressure sensor - your year definitely does not need it.



-Ted

 

Beef up the firewall to bell housing ground.
Add a battery (-) to leading coil mount cable.
Alternator frame to leading coil mount makes a good backup.
And, as was said above, check the ECU harness ground eyelets.