rx7girlTK

ok so we hooked up the turbo timer lastnight...we put the blue wire into 1m on the ecu..it does not read the speed at all..and we put the brown rpm wire into 2b on the ecu...it shows the rpm's only at a steady rate...if you go to accelerate or deccelerate it takes a long time to get to the exact rpm...now it worked fine when it was on my brother's car..so my question is has this happened to anybody else? and how can it be fixed? thanks

DMRH

Checking the series-6 (92-95) workshop manual.

ECU pin 1M = input from speed sensor in instrument cluster
ECU pin 2B = Diagnosis port (IG terminal) 0.3V-0.8V at idle rpm - 1.8v-2.2v above 3000rpm. Also output to instrument cluster

Thats about the best I can help here RX-7girl

spyfish007

Check the quality of your ground.