P1320 INFINITI -

Question

1999 infinity q45, replaced all spark plugs and all eight coils, idle got worst and transmission light came on, what could the problem be?

Answer 1

Did you use new factory ignition coils?

The P1320 means that the circuit of one (or more) of the ignition coil is either open or the resistance is too high. Usually the problem is caused by a bad ignition coil, but if the coils are new then the problem is the wire from the ignition coil to the Engine Control Module (ECM).

Comments

the new coil packs are not O.E.M. I checked resistance on 4 of them and they range from 1610 to 1640.  I checked resistance on all 8 of the originals and 5 of them range from 1640 to 1680, the other 3 range from 1740 to 1780, could these three be the problem?  Also, after installing the new coil packs, the missfire got worst and the slip and tcs light came on, has no power at all, it even stalls during idle..