VY Commodore 3.8l V6 Backfire on Idle

[Halon]

Hi Guys

My VY commodore 3.8l V6 Has a Backfire on Idle issue. I have changed Fuel Filter, Plugs. Coil pack is working fine, but have not changed leads as yet.

However while checking i found that When the car is in Idle & Backfireing if i dissconnect the MAF sensor there is NO change..... The car still runs ....not even a slight change in revs.... is this a Faulty MAF? & is this issue consistant with the backfireing fault ?

the 'Check Engin' comes on Sometimes...NOT all the time.

Any Help will be much appreciated.

PS Took it to a Mech in Darwin.... he wants $180 just ro read fault codes & he cant do it for a Month. Typical of Darwin.

 

[Halon]

Update:


I re-set Fuel consumption average & drove the car for 20mins. On completion the reading was 68L/100km… before it was 11.5L/100km… so running very Rich. Then I set the dash display into Diagnostic mode to check Instantaneous fuel consumption…. That reading was over the roof…. So yep… she is running Rich.

There could be many issues. I suspect the MAF….. The computer not detecting correct airflow & is running the car rich which is its Protection mode. Ordered new MAF, new Leads, Plugs & O2 sensors…. Will see how that goes.