Sorry forgot to reply, there’s no electrical connection between the MAF and the chassis
It got through with a. Combination of the cheap Chinese MAF, cleaning the idle stepper motor and some tweeks but drove awfully. I replaced the MAF with the original one and it drives much better.
Couldn’t resist opening the MAF electronics and having a look at the screw pot. Very interesting. It’s a multi turn pot, six turns takes it from 0 to 100 ohms (checked on the Chinese one) and it would continue Turing if tempted
After lockdown I’m going to take it back to my tester chap and tell him to try multiple turn on the original MAF screw to see if he can get the emissions low enough yet still drivable. Oh and I’ll fit a new stepper motor, plugs and leads too as I’ve nothing better to do but decorate the house for two weeks now!
