Geo Tracker will crank over but won't start

[brandonb]

Thank you for all of this information. I have throttle body injection 8 valve TBI engine. I made the mistake of thinking that the ECM output a positive voltage to the CEL wen in fact you have confirmed that it's output is actually to GROUND. The battery and seatbelt lamps are on, so I know the panel is getting good +12V, so I will ground this pin tonight when I get off work. I took the battery out last night and hooked it up to a smart charger to give it a good charge. I will return the results later tonight, I really appreciate your help. I hope the ecu is capable of outputting codes so we can get this thing running to go.

Thank you so much for your detailed and informative help.