transamice

Can I still get a reading from my vss without the ecm, if not then what other options do I have besides running a cable operated speedo?

Tuned Performance

iTrader: (92)

you don't state what your dealing with so I will assume 87 tpi or tbi. the vss sends a signal to the vss buffer from the buffer to the ecm and to speedometer. If thats the case to keep your speedo working you do not need the ecm.

transamice

87 TPI auto, just want to eliminate the stock ecm, but want to still have speedometer working.
Whats needed or it will just work like that, from vss to buffer box to speedometer?

Tuned Performance

iTrader: (92)

just disconnect the ecm and the speedometer will work from the vss singnal out from the buffer.

transamice

Thats great, thank you for the diagram, been looking for something like that

Bobby Suth

iTrader: (2)

speed senser is on a 90 f body tailshaft.WHERE is the VSS buffer box.No one has answered that for me?

transamice

90-92 is in your ecm from what I understand.

t-top havoc

iTrader: (3)

What if the ECM was removed?
Our '87 Camaro has '92 Firebird gauges. There is a yellow thing on the back of the speedo.

91phoenix

iTrader: (5)

The buffer box on my 91 V6 Bird is on the passenger side directly behind the dash where the map pocket goes. It was between the plastic dash and the matal backing. It is almost beside the ECM.

t-top havoc

iTrader: (3)

Thanks for the help!!
Much appreciated!!

Bobby Suth

iTrader: (2)

whats it look like?

John in RI

iTrader: (167)

In your 87,... Yes.

The Speed Sensor feeds the Buffer and the Buffer feeds the ECM, Cruise, and Speedo. If you remove the ECM the buffer will still feed the Speedo and the Cruise system.

punkmaster98

iTrader: (5)

I think i have a similar question. im putting the rear end from an 87 bird with higher gears on my 92 bird. is there any way to prevent the speedo from being off? the donor car will be available.

Tuned Performance

iTrader: (92)

grab the vss and drive and driven gears just to be on the safe side.
you can see on the attached link the gear ratio and tire size calculator.

http://www.transmissioncenter.net/sp...n_______va.htm

Tuned Performance

iTrader: (92)

you can always recalibrate the speedometer with a dakota digital sgi-5

http://www.summitracing.com/parts/DAK-SGI-5/

punkmaster98

iTrader: (5)

thanks lol i think tht would be a last resort. college has me on a budget

manolis1969

Here is a video of how to calibrate ur speedo using a dakota digi box..