FREE TESTING IGNITION COIL & MODULE TOYYOTA PREVIA TRUCK CAMRY 4RUNNER LAND CRUISER LEXUS GS300

[@duanedonaldson2262]

I believe the I is for ignition timing (IGT) to assist in creating a spark and F is for fire (IGF) meaning the spark worked and the F is the signal back to the ECM stating there was the spark. If one of these did not work, a code is set in the ECM directing you to the problem but always diagnose and don't just change parts.

[@rushinbot1830]

LOL, Andy the mechanic has an easier way, but perhaps that's bescause I have an oscilloscope.

[@ronnydoran4923]

what is the F&H wire

[@HoangTran-ge5eg]

that f & i not F & H they go through ignition pickup