Rough idle/running, misfire ? Clueless ! Please help!

  1. My model of MX-5 is: NA
  2. I’m based near: Glasgow
  3. I’m looking for technical help or recommendations on: Okay so the problem of rough idle remains, I’ve now serviced it, so fuel, air, spark plugs and ignition leads, I’ve replaced the intake manifold gasket and all seals from fuel injectors on both sides and the MAF sensor, I still cannot seem to find the solution to fix it, any idea guys ? PS the exhaust is off the car as it is going to be replaced with a full stainless that’s why it is so loud, however the problem was there when the exhaust was on the car too so I’m thinking surely that can’t be the problem ? Thanks in advance !

I’m trying to upload a video to explain but can’t get it to upload can anyone help ?

Year & engine cc would be useful. There are a lot of variants.

Sorry mate it’s a 1998 1.8

Hopefully I’m not sounding too obvious but have you checked for error codes?