I think I'm seeing the issue but have another question. I installed a Painless Performance #60116 speedometer cable VSS which is advertised to work with TBI computers. My raw data was showing function but on second examination I'm not registering speed all the time. In fact (running the car on the lift) most of the time it doesn't show speed under about 60mph. Above that it's good (albeit showing way too high speed) below it stops reading and goes to zero. I took an AC voltage reading off it and am showing around .4 volts to 1.9 volts at higher speeds. I'm wondering if it simply is not putting out enough voltage for the computer to read. Does anyone know what kind of typical voltage should be seen for this number ECM? Also any recommendations for a cable VSS that has worked with this ECM?
Does all this mean nothing and do I just need a DRAC?
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