[bhurd320]

Has anyone tried cleaning there MAF, if so did it improve??

[Nick91]

Originally Posted by bhurd320

Following this thread, as my mpg in my 58k miles 2008 e91 took a nose dive about 2 months ago, now getting around 30 mpg around town and mid 40s on motorways, had a service on air, oil, and diesel fuel filter, it has increased but not loads, thinking mayby the maf may be faulty now, is the maf the bit between the airfilter box and intake manifold, square looking thing with a couple of connections on it, as i will try disconnecting it, but it ticks over and starts perfectly, and has pull before it hits 2k rpm, then it takes off and revs cleanly to the redline, car is showing no codes as it was checked on saturday when it was serviced, temp gets up to 89 to 92 within 15 mins of driving,

Got virtually the same problem. Bought the car in September and was averaging 43mpg serviced it maybe October/November and mpg nose dived to 30.4mpg. Haven't checked temperature but a 25% drop in mpg seems excessive to me for a bit of cold weather. Reset the counter on long journeys but still hasn't gone above 40mpg on the motorway. Very disappointed my 1.9cdti signum never dropped below 44mpg regardless of anything.

[bhurd320]

Originally Posted by Nick91

Got virtually the same problem. Bought the car in September and was averaging 43mpg serviced it maybe October/November and mpg nose dived to 30.4mpg. Haven't checked temperature but a 25% drop in mpg seems excessive to me for a bit of cold weather. Reset the counter on long journeys but still hasn't gone above 40mpg on the motorway. Very disappointed my 1.9cdti signum never dropped below 44mpg regardless of anything.

ordered myself a can of MAF cleaner and the MAF looks easy enough to remove so going to give it a clean at the weekend when the cleaner arrives and will report back, the airfilter was filthy when it was serviced so fingers crossed it should return the MPG