Monster Tach Install...

[MA70witBoost]

Ok, I just bought an Autometer Phantom 5" Monster Tach w/ Shift light for my supra... I have it mounted, and it has the power, ground, and illumination cables connected.... All i need now is to have the tach read RPM's.... I dont wanna tap into the wiring for the CPS in the bay. Anyone know wich cable i gotta tap into on the ECU side of the harness to get it to read?

 

[Jayhall]

you can plug it in to you diagnostics port, under the hood. Thats how i had mine

 

[MA70witBoost]

Im reading the cygnus thing and it says that its the blue wire comming from the cps.... that thats the one that sends rpm signals to the computer. Its an 87 Turbo. Its a brand new efi harness so i dont wanna tap into the wires under the hood... I just did one hell of a clean up on the bay and id like to keep it like that. If anyone can tell me where on the ECU side of the harness to tap into id appreciate it. Im even contemplating pulling out the cluster and tapping into the line going to the tach but i've heard its a mission to pull the cluster out... besides, i have just enough cable to reach the ecu... might as well stick with that option.

 

[Jayhall]

see the wire right behind the ignitor, thats my RPM signal wire. PLugged into the diagnostics port

 

[MA70witBoost]

and that works? If so, ill leave that as a last resort.... im really not in the mood of feeding another damn wire through the firewall... im running on 3 right now... Its cramped enough in that little damn hole as it is.

 

[Jayhall]

and that works? If so, ill leave that as a last resort.... im really not in the mood of feeding another damn wire through the firewall... im running on 3 right now... Its cramped enough in that little damn hole as it is.

yep it works, BIC showed me when he finished up my motor swap. I dont blame you for not wanting to run another wire, its such an pain in the ass.

 

[MA70witBoost]

This is besides the point what im showing you guys... the first picture is how my bay was when i bought my supra back from my boy ray.

This is now... just remove the catch can. Im still trying to figure out what imma do with it.

 

[87_7MGTE]

is the stock tach not big enough?

 

[MA70witBoost]

nah, the stock tach is fine.... I just wanted to add the autometer with the shift light... I'll have pictures of it installed later on... i just want it working now.

 

[shaeff]

MA70witBoost: your catch can isn't going to be doing a whole lot over there near the exhaust. the can will get so hot that the vapors won't even condense, and they'll still make their way back into the intake tract, (via vaccuum).

move it over near the brake booster. keep it in as cool of a place as you can.

(and you might want to get an air filter on there )

-shaeff

 

[MA70witBoost]

i was wondering how long it would take you to pop in here shaeff... the catch can has been removed... its not in the bay right now. I tried moving it near the brake booster but no go. But the catch can isn't my concern now. any idea for the Tach man?

 

[shaeff]

i'd just use the wire that SupraCentral stated. (the green one)

a real easy way to get the wires through that grommet, is to use a metal coat hanger. i've never had a problem with it.

-shaeff

 

[IHI-RHC7]

Here ya go, RPM1 is IGDA, I think and RPM 2 is IGF.
IGDA fires from the ecu every time a plug fires, IGF is the confermation signal back to the ecu to report that spark has happened. I'd use IGF.

-Jake

 

[IJ.]

Add more tachs 2 just isn't enough !

 

[Stanzaspeed]

+1 lmao! :biglaugh:

 

[IJ.]

SS: Put a 6 speed in your next car !

 

[MA70witBoost]

Nah, not looking for top end on this one. Im more interested in low end tourque. Imma read up later on how much power the W58 can handle. I dont have a turbo tranny on my supra.

 

[MA70witBoost]

Here ya go, RPM1 is IGDA, I think and RPM 2 is IGF.
IGDA fires from the ecu every time a plug fires, IGF is the confermation signal back to the ecu to report that spark has happened. I'd use IGF.
http://img65.imageshack.us/img65/7236/pinout4gw.jpg
-Jake

whao, jake, you lost me with the whole igf and igda crap. Nice drawing of the plugs for the ecu... wich one i need to tap into?

 

[Dirgle]

I'm not sure why you need another large tach when the stock one works perfectly, to each his own I guess.

Here is the wire you tap to get a tach signal. The IG- connection (Just like Jayhall said)

 

[MA70witBoost]

Ok, I know where the diagnostic port is... I've known since it was first mentioned.... Only one question remains on my mind... What slot do I connect the wire to? Is any random slot with in the port good? Or is there a specific one I need?

And for the record, I know that the factory tachometer works fine and does the job... But I haven't been driving this car long enough to know how the revs sound. I wanted the shift light more than the tachometer but the Tach w/ light looks nicer than just the shift light. Hence why I got the tach. Pictures will be posted shortly... I guess I dont like the look of an empty interior. The more gauges the better. Expect 3 more smaller gauges like the ones on my A-Pillar to show up soon. Its good to have as much information as possible on your motor. Especially on a 7M.

W/O Autometer Phantom 5" Monster Tachometer w/ Shift Light