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Hello guys,
I have a problem with my 172 ph1. The idle is very lumpy and I can hear it misfire sometimes. It is having a little 'puf' at the exhaust sometimes when idling. Also it doesn't run good till 2k rpm. When you accelerate you have a little 'bump'. Changed the TDC sensor, an other coil...
Could it be lamba sensor? Because lambda did give a fault past 3 months but didn't change. Never had the problem before but maybe the leads an new spark plugs respond to the faulty lambda?