1990 Infiniti Q45 Q&A
1990 Infiniti Q45 Question: gapping the spark plugs
The spark plug gap should be ..039" to .043" of a inch. The Iridium or double Platinum plugs come pre set. I like the Q45 but have seen random misfire caused by bad ignition coils, bad injectors, and or bad ECU (computer). I hope your car has no problems and you are just performing maintenance. - patrick mannion
i dont know the correct gap size .