Not 100% sure, but I'd tend to think that the RPM signal wire is the wire that feeds the stock tachometer. You should be able to find it in the manual, coming from the ECM (or PCM, if that's what Acura calls it). It might be listed under "tach out" or "tach sig" etc.....

Also, the throttle wire is probably the one of the wires going to the throttle position sensor. If you can't find which one is the signal in the manual, you can use a voltmeter. Just probe each wire with the key on, until you get a reading somewhere between .1 and .9 volts. Closed throttle should be about .1V and wide open throttle should be about .9V

Hope this helped.



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'01 CL Type-S Navi
'99 M3

 

tom is right about the tach wire. it controls the tachometer and is called tach signal. i used it for my remote starter. under dash - blue

not sure about the throttle

 

Thanks Tom and mr TL
Damm ..... This site still the best to squeeze out information .... ...

OK in the helm manual I found a wire on the PCM (ECM, ECU) harness call TPS, I think this is the throttle position sensor then.

There is a blue wire from the PCM nabel NEP which I think the RPM output according to the helm book circuit attaching to the tach. I have to check the manual again for something label as Tom said ....

If i can get this apexi vafc to work, i definitely get the instruction up for you guy. It's really a pain in the b*tt.

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I got the Electronic helm book to help me install the vafc and im still confuse
I figured out all other wires accept for 2

Acura abbreviate pretty much everything so here the questions i need you guy to clear my brain.

There are 2 wires that im still confuse from the Apexi VAFC manual: throttle signal wire and the RPM signal wire. What are they?

The RPM wire:
I check the diagram of a prelude and an installation from the prelude forum, they said the RPM signal wire is the ICM wire. so what are they? Where are they? Is that the Ignition Control Wire that connected to the Ignition coil? What's it has to do with RPM?

The Throttle wire:
Is that the Throttle out wire or the Throttle Position wire?

 

well? did you figure it out? keep this post updated - please and thank you!

 

And don't forget to post your HP results..........

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Comptech exhaust
Comptech springs
custom air intake
18x7.5 Alstadts w/ 53mm offset
225/40/18 Kumho Ecsta Supras
Plastic on grill color matched
153mph Top Speed
193hp @ the wheels

 

OK I confirmed 1 more wire ... The throttle wire the TPS wire.

The last wire the RPM, there are different wires that I found and need to narrow down .... The one you guy said (BLU attached to tach and there's nothing label with the word tach) and ICM wire(s) (which I can't find yet) The ICM wire is the one i should use and right now i still don't know which one it is.
Is the ICM wire(s) the one connected to the ignition coil? If it is, there are 6 of them, one per coil.

I will definitely keep you guy updated and will let you know what that thing does to our TL.

FYI: I haven't install it yet ... I have to find all the wire before mess around with the PCM ..... StreetEffectz is installing it in my sunglass holder

Here's a pic of it, and not installed back to the roof yet.



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