• Welcome to ClassicBroncos! - You are currently viewing the forums as a GUEST. To take advantage of all the site features, please take a moment to register. It's fast, simple and absolutely free. So please join our community today!
    If you have problems registering or can't log into your account, please contact Admin.

STAK + EFI Speed Sensor = ???

XT700

Full Member
Joined
Apr 11, 2002
Messages
797
Loc.
Brownsville
Has anyone installed EFI with a STAK t-case? After reading through the information on BC Broncos and the RJM site I think I've got a handle on most of the sensors but not sure how to make the speed sensor work with the STAK. Any help would be greatly appreciated.

Thanks, Walt
 

Bronco Brian

Bronco Guru
Joined
Feb 10, 2006
Messages
1,140
You need to order a Stak with the VSS. Then use that VSS. It really is that simple.

I could be wrong but wont the Stak sends the wrong signal.
This is the ford VSS
The Vehicle Speed Sensor produces 8 pulse per rotation which a stock computer assumes 8000 pulses per mile.

From the Stak Site
Our VSS is a factory Jeep Rubicon sending unit. It is a direct plug in to 2003-2006 Jeep Wranglers and is easily adapted to the 1997-2002 Wranglers. Our VSS sends three pulses per revolution of the rear output shaft. If you need a different signal or pulse count, there are several aftermarket “signal convertors” available.


So you wil need a Signal Convertor
I would like to know how this turns out for I have been thinking about a Stak too but it will be a while
 
OP
OP
XT700

XT700

Full Member
Joined
Apr 11, 2002
Messages
797
Loc.
Brownsville
Thanks for the info. I did order the Stak with VSS, so with a signal converter I should be good to go. I'm assuming I can just 'splice' to the VSS, one lead for the speedometer and the other to the speed sensor.
 

Broncobowsher

Total hack
Joined
Jun 4, 2002
Messages
35,632
From what I have seen the Ford computer isn't real fussy about the VSS signal it gets. Many people run without one completely.

The only logic I am aware of in the computer regarding vehicle speed is a little coast down stuff (coasting down a hill against the engine and it stalls at the bottom). Keeps a basic IAC setting until it knows you are completely stopped as opposed to seeing high engine speed and no throttle and backing off the IAC to nothing. Then when you do stop there isn't enough IAC to keep the engine running.

The second is some hidding timing stuff that kicks in a 100 MPH, or with the Stak sensor 267 MPH.

Unless you just have to spend the money, try wiring the Stak sensor straight to the EEC. If you find the timing stays too advanced over 267 MPH or you have a stall after a long coast, then look at spending some money on a signal multiplier.

As far as wiring it, I think you have it wrong. The EEC puts one of the signal wires to ground, the other goes to the input. That should be completely compatable with the speedometer as well. If the speedo has one signal wire, it shares the same signal as the EEC gets. If the speedo has 2 wires for the sensor then they both go to the sensor (and one of them is grounded for the EEC)
The sensor has 2 wires, you don't give one to each. The sensor is not internally grounded. It would be unlikely that either would work at all. Well the EEC would probably work, just not care about the lack of signal.
 

Bronchole

Bronco Guru
Joined
Mar 24, 2004
Messages
1,611
Loc.
Chatsworth, Ca (LA)
THREAD HYJACK!!!!

If I wanted to find a VSS for my Dana 20 so that I could use an Autometer electronic speedometer and also feed the signal to the Ford EFI, what vehicles should I be looking under in the junk yard?

Dan
 

bax

Contributor
Old Member
Joined
Aug 22, 2005
Messages
14,498
Related question/ hijack
I also use an autometer electronic speedometer but mine is off about 10 MPH. How do I fix this? 205 transfer case.
 

Broncobowsher

Total hack
Joined
Jun 4, 2002
Messages
35,632
Don't hijack people. Start your own thread.

Exactly. That is why I didn't answer there question. And I hope no one else does as well. That is unless they start a thread of there own for the question. Then by all means, answer the question. So long as it pertains to the original post.

I really should make a canned response to hijackers, simply telling them to start there own post.

Back to the original post, let us know what you decide and how it turns out.
 

bax

Contributor
Old Member
Joined
Aug 22, 2005
Messages
14,498
Note! Hijack after his questions were answered.
 

meckanik

Jr. Member
Joined
Sep 27, 2005
Messages
164
Loc.
Issaquah, WA
The STak uses the Jeep sensor which like the early ford are 8000 PPM output signal.
Heres some info..http://www.magsensors.com/vssapps.html

Cary

Der, I forgot to mention that. :p It's from a Jeep Wrangler Rubicon transfer case (NP241). Metripak was a reference to the type of electrical connector on the end of the sensor.

BTW, I got my Stak from Cary. Great guy to deal with.

-Jeff
 
Top