i just got a new oil press guage from APC.it has connections for dash light circuit,sender,engine ground,and ignition switch. where can i ground the direct engine ground wire too?can i just ground it?>or does it have to be a special place. and the ignition switch wire,dont i run that to 12v switched(key)power?

 

My wire up went like this:

-12V Power Source Line (Red) - tapped Into cigarette Lighter positive.

-Ignition Line (Orange) - Same as above.

-Parking Light Source (White) - Cigarette Lighter Light bulb (positive).

-Ground Line (Black) Either the Cigarette Lighter or It's Bulb. (negative). I choose the former.

The good thing Is you are able to dim It In sync to the stock Interior lighting with this wire up. I have all the excess routed back Into the cabin for a neat appearance. Refer to your Instructions to see the coincision, If any.

 

thanks,the directions said "engine ground"so it kinda threw me off. heres another i wanted to get the afm and four piston calipers off of an s5,will those parts work on an s4?

 

Shouldn't this be posted on a seperate thread?

As for the AFM > https://www.rx7club.com/forum/showth...&highlight=afm

 

yeah but i post to much,i didnt want to annoy anyone

 

if you grounded it to the engine near the sensor it will have a slightly better reading but I doubt you'd notice.

just make sure you have a good ground from the engine to the car. I added one from the intake manifold to the firewall.

 

where on the engine would i ground it though.just under an existing washer?

 

If you need a question answered, ask. Don't be concerned about people getting annoyed. There are MANY members that ask stupid questions like "how can I beat a Supra", "help me spend $2000".
As for the engine ground, you can ground anywhere on the engine but make sure it's a clean ground (sand off the area).

 

Don't bother with the S5 to S4 AFM. It's not worth it. I don't think anyone has figured it out 100%.
The S5 and S4 4 pistons *should* be the same.

 

with the oil pressure meter i got,it came with a little black piece marked "epicenter e-12-686-1" and it has four wires on it,two black one red and one white.it says nothing about this in the instalation info,can someone name this piece? its about 1/2 inch by 1/2 inch

 

If that's the color gauge, "glow something". I **think** that's for the module (separately sold I think). Does it have a connector at the end? If so, that should be it.
The oil pressure gauge is simple. Ground, power 12V switched, sender and dash light (dimmer).

 

cool thanks