so things continue as this or similar from when i bought car.its about for 2 yrs now. i changed spark plugs, wires, petrol filter , LPG filter , air , oil changing as supose too and diff oils too. but from beggining i have some kind of power loss or lagging when wanna accelerate from stop. sometimes it goes fast and sometimes it thinks 1,2,3 seconds just then moves.
i was reading what could cause that and such , was cleaning all intake parts and valves that can be cleaned there.
i am getting just P0420 code what says bank1 error. so it kinda O2 sensor , but does front sensor can cause power loss , stall sometimes from no reason and lag in acceleration ? its sounds more like air flow mass sesnor , or IACV . and then could that be bad catalyst. but again would catalyst cause all those symptoms ?
so i cleand IACV maybe 3 month ago. it was not so bad , but i cleaned it anyways and other valves and sensors too that people say in net could cause suchs problems. but just today my call stall in middle road. but then i stopped fast , put on P start engine again and it went as if nothing happens. i had stall engine before too before cleaning that IACV.
so whats about that air flow mass sensor then ? i found as forester ppl talked about that this one can sause power loss and lagging with moving car.
and error says its kinda front O2 problem. but thats kinda not very much as O2 does .
or could it be both sensor like air flow and IACV ?
whats else then .
and more important is there any simple ways to test those parts for fault ? i heard to test catalyst you remove front O2 sensor and try drive as that. if power comes back then its catalyst fault. can it be true this test?
when i wanna car go quick and floor to metal car sometimes doesnt even move for like couple seconds. then when i want to overtake other cars i need to really floor it pedal full. and then it does something ... i thought it might just gearbox kinda slugish but then i read all those people have similar problems too.
thx all .