Infinity G20 misfire

If you didn't use factory OEM ignition parts i.e , distributor cap, rotor and wires you may want to do that first.

Nissan's are very finicky about ignition parts, they don't like anything but OEM replacements

Jack, It is important the "check engine light" comes on when the ignition is turned on to ensure the indicator light is functioning. After the engine starts then the light will go off if the ECU does not detect an error. In the event the CHL stays off then the ECU is telling me it has not detected an error in the air flow meter, the engine temp. sensor, vehicle speed sensor, exhaust gas sensor, detonation sensor and the throttle sensor circuits, thus eliminating a number of possible causes for my symptoms. However, the ECU on the

1991 G20 is not as sophisticated as today's OBDII computers. I believe that the G20 unit will only detect open or short circuit problems rather than detect an out of range function. I'm hoping there is an ECU geek out there who can give me more instruction in regards to this. Meanwhile, I'm off to Infinity to get some new HT leads. The ones I have are not OEM and I have already 'fixed?' two independent misfire problems by changing out leads. With this third time experience I was begining to conclude that all these misfire occurances were from another source of failure but the OEM question may be the answer. Malcolm