CRM Mitchell1 2023-10-17T22:01:45+00:002009 Infiniti G37 CRM Mitchell1 2023-10-17T22:01:45+00:00
- Engine – Codes P0301
- Cylinder 1 Misfire Detected Verified constant misfire on #1. Added suplemental fuel to intake, misfire did not change, ruling out injector fault. Access and remove #1 coil and load test. Coil output is good, but arcs out the side of the coil tube when installed, causing loss of spark to plug. Plug gap measures .054", spec is .043". Worn out/over-gaped plugs can cause coil failure. Replacing jsut the one coil will sole misfire for now, but highly advise to replace plugs at this time. T/Bs are very dirty also. Advise T/B service, IAV relearn will be required.
- Replace ignition coil and throttle body gaskets
- Clean both throttle bodies and MAFs then perform IAV relearn for idle system
Heidi D. gave our service a 5 star review on 10/16/2023