Hi guys.

I bought a obd2 bluetooth code reader from ebay, to use with the torque app on my android phone (thought is would be cool to have all the readouts on my phone).
so i plugged it in to the car (st170) turned on the engine & straight away the tick over was jumping from 1500 to 500 rpm. After about a min or two the engine management light came on. used torque to read the code which is P0102 & re-set the light, but now my car has no power & the light keeps coming back.
i've checked the maf, that looks in good condition. unpluged it & that makes no difference besides throw up a couple more codes.
Has anyone else had problems with one of these devices? or know what the problem might be? I had no issues with the car before plugging this bloody thing in
Thanks