lexus-is2

I recently swapped out my MAF sensor with a brand new Denso one because i was getting random sluggish power issue and my mpg was seriously low no-matter how i drove. So after swapping out the MAF, the mpg improved a lot, but the throttle response was still slightly off and i had random rpm issues.

So eventually i decided to reset the ECU by disconnecting the battery, and since then rpm and throttle responses have become very good. Does it really require a ECU reset after installing a new MAF? i would have thought having had the new MAF sensor in for a few weeks that the ECU would learn the airflow automatically

Gville350

iTrader: (10)

Ideally any time you replace an item relating to the performance of the motor, you should "reset" the system.

Glad it seemed to have helped you out. Had you tried a MAF cleaner spray before the swap?

lexus-is2

Yes i cleaned with CRC MAF cleaner, helped a little but was still sluggish and had random rpm and power issues. So decided to try and replace it.

Gville350

iTrader: (10)

Good; just making sure you did all one could have done before dropping the cash a new MAF sensor.

How much did that set you back by the way?

DoctorJ

My 08 is250 awd is having a vibration at idle and threw P0102 and P0113 for MAF problems. Cleaning it with MAF cleaner helped out and the ECU reset did as well however it still idles a bit rough sometimes at stoplights. Did your new MAF smooth the idle at all?