Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing My continuing GDI saga, and its not good news.

I didn't ask. Given that there were no fault codes when it failed the MOT with the AR upgrade, where both CO and HC was more than double the maximum limit, I really don't see the point. It's almost as if the ECU is blind to faults, and just alters fuel pressure as a consequence of the MAF input. It will remain a paradox.

It's tempting to get a spare MAF, but it's such a rare occurence. I had the Roadster run a bit unevenly a few years ago, and a squirt of MAF cleaner sorted it. That's the usual routine. This is another reason why I don't really worship oiled filters like K&N, because there's a risk of oil droplets contaminating the MAF sensor.