Griffith MAF sensor

[8Speed]

What would you recommend to clean the MAF?
My idle rpm hang up sometimes & I suspect it may be the MAF. OK on start up & cold but more frequent when warm.

[gavgavgav]

have you tried unplugging the stepper to see if that's the cause?

[8Speed]

gavgavgav said:

have you tried unplugging the stepper to see if that's the cause?

Yes thanks.
Stepper motor unplugged & cleaned so I don't think it's that.

[Belle427]

You need the non residue electrical contact cleaner for this.
Worth checking the wiring to it as this is a common problem, there are some test procedures listed here somewhere to save on guessing.

[scottliv]

I have a similar issue (4.3 Precat) where I am getting very low mpg so have tested all the ECU components. Fuel and coolant probes were good (3600 ohms) at around 12 degrees ambient. TPS was at .39v at idle so set to .32v. AFM though when the car was turned on spiked then dropped to 0.5v then slowly moved to 0.4v. I took it apart and cleaned the hot wire with AFM cleaner but there was no difference. The CO was set to 0.8 so have set that to 1.25v. Just need to set idle properly now but I have a mate with a Chim so may ask to try his AFM. Will need to wait for lockdown to finish to progress further.

[ESDavey]

Try unplugging the AFM to see if it’s the cause. I went through a few AFMs before ditching it as part of the MBE upgrade