my 99 turbo 2000,has eratic idle,and wont go at all on boost,and when you back off it backfires,i connected the black wires under the dash and heres what it tells me,2 slow flashes then 2 fast-----2slow flashes then 3 fast flashes.can anyone help me out with these codes please.

 

22 Knock Sensor
23 MAF

 

Change the MAF sensor first, then reset the ecu to see if the code for the Knock Sensor comes back

 

thanks buddy,its wierd it ran fine before i rebuilt the engine,been off the road a year,withing a week of been on the road i get running problems of a different nature----typical

 

i can understand the air flow one as they are common,but not the knock sensor,i must confess to removing it when rebuilding the engine,is there a specific way to re-install it or is it just a case of sitting it back on,bolt it up and connect the wire.