ECU Tach wire?
#1
ECU Tach wire?
To avoid fishing a wire thru the firewall, I'd like to tap the ECU for the tach signal.
My Questions are:
The "IG-" is a positive four pulses per rev, correct?
So I can tap either "NE" or "IGt" at the ECU?
For the record it is a 1994 Truck with 22-re, manufactured in california on 10/1993. And it wasn't plug and play for the cool toys, No tach, no Lights in the Coin/Ashtray.
Yes I've searched (closest answer is/was pin A25 at the ECU, and that doesn't work for my model/year).
Atleast it had factory radio plugs after I fished them out of the dash, and threads for the maplight with nighttime switch mirror.
*Edited* Clarify engine type
My Questions are:
The "IG-" is a positive four pulses per rev, correct?
So I can tap either "NE" or "IGt" at the ECU?
For the record it is a 1994 Truck with 22-re, manufactured in california on 10/1993. And it wasn't plug and play for the cool toys, No tach, no Lights in the Coin/Ashtray.
Yes I've searched (closest answer is/was pin A25 at the ECU, and that doesn't work for my model/year).
Atleast it had factory radio plugs after I fished them out of the dash, and threads for the maplight with nighttime switch mirror.
*Edited* Clarify engine type
Last edited by Co_94_PU; 12-28-2012 at 11:39 AM.
#2
Registered User
What's the engine?:
22R
22R-E
or
3VZE
I know you're not asking for an opinion, but, the only comment I'll make is, I'd stay away from the ECU. It is not too difficult to run a wire through an already existing firewall hole to tap into the coil.
22R
22R-E
or
3VZE
I know you're not asking for an opinion, but, the only comment I'll make is, I'd stay away from the ECU. It is not too difficult to run a wire through an already existing firewall hole to tap into the coil.
#3
Oops, it was there the first time i typed that out and timed out sorry. added it and clarified here..
It's the 22-re. It does not have the handy test port located at the coil pack either.
The EFI system is described at http://www.autoshop101.com/forms/h23.pdf it's a reprint of some toyota documents..
I have the wire set from a junker, I just sort of forgot where they came out of exactly. It's also 50 mile trip to go find out. The "IG-" at the diag port is the obvious choice, but man thats a lot of cable squeezed thru a little hole under the blower. I worry of chafeing and peer ridicule if I just fish it thru and tie it up to the bundle.
I don't mind given an/the opinion. So here is a direct question of them.
Would you tap a sensor or a trigger? (Yes it seems obvious) What are the ramifications of each?
It's the 22-re. It does not have the handy test port located at the coil pack either.
The EFI system is described at http://www.autoshop101.com/forms/h23.pdf it's a reprint of some toyota documents..
I have the wire set from a junker, I just sort of forgot where they came out of exactly. It's also 50 mile trip to go find out. The "IG-" at the diag port is the obvious choice, but man thats a lot of cable squeezed thru a little hole under the blower. I worry of chafeing and peer ridicule if I just fish it thru and tie it up to the bundle.
I don't mind given an/the opinion. So here is a direct question of them.
Would you tap a sensor or a trigger? (Yes it seems obvious) What are the ramifications of each?
#5
Registered User
Thread
Thread Starter
Forum
Replies
Last Post
altydog
86-95 Trucks & 4Runners
1
07-28-2015 10:20 AM