hi i'm new here , i've had my evo 4 for 3 years and its starting to play up . it runs lumpy at idle almost cutting out sometimes . everyone i spoke to said it would be the maf sensor so i got one and changed it this morning but the problem is still there , i've checked all the vacuum pipes but they seem to be ok . any suggestions would be most appreciated

 

I would start with a good boost leak. then i would take the throttle body of and sensors and clean it all completely with throttle body cleaner.make sure you mark the tps to line it back up right..then i would clean up the maf .make sure your plugs and spark plugs are ok

 

thanx for that , will try all of that asap

 

Clean up the Idle speed control motor.....could have filled with crud...if not replace.
Then use evoscan to reset the idle speed.