Dahoozeh

Can any1 please tell me why my sti 1999 wagon jerks

when i drive it is like randomly it holds back for a second or two and then is normal

i have had a look at my turbo timer when this happens and the oxygen sensor shows it drops, to me this would mean for a second it looses its power instantly, it just jerks like someone held it by the tail and give it a tug

now i think it maybe the air flow sensor but im a rookie so if anyone knows please feel free to advice

scoobymark73

Sounds like a MAFF sensor failure. I had one myself several times in fact. had to remove a cheap GFB dump valve in the end. A sensor is no more than 60-80 quid depending on where from an its a ten min fix in the right garage. it would be my first suspicion.