- My model of MX-5 is: 2012 MK3.5
- I’m based near: Cardiff
- I’m looking for technical help or recommendations on: Missfire
I have a 2012 MK3.5 and recently it’s starting idling absolutely terribly. It idles around 750rpm and is lumpy and missfiring constantly.
When you drive the car it’s fine its only when you stop to idle at lights it gets rough again. The car was fine when it was parked up about 2 months ago with new plugs but since I’ve gotten it out again (other than moving it around the yard a few times) it’s developed this issue.
I’ve tried a MAF from a different NC. I’ve tried putting the old spark plugs back in and it’s still like it. If I unplug the maf it seems to run slightly better. Also if I remove the wires from the plug nearest the bulkhead it seems to run on 3 obviously but semi less rough??
It has an IL Motorsport downpipe which was installed about 1000 miles ago if that effects antrhing?
Anyone have any other suggestions of what to check?