hello, i always had a civic 1.8’s but i bought a turbo 1.5 which was in okay condition. firstly it had a blown intake pipe which connects to the turbo, due to the previous owner driving with a blown air intake there was a lot of carbon emission residue. moreover i cleaned all the mandatory stuff (cats, air box intake o2 sensor and fuel sensor) the car was giving me very bad fuel average like 4.5-5. i then changed spark plugs and air filter and the car was around 9 if u go on an hour drive but stuck at 8.3kml in city. it’s also fuel consumption is a bit much, i don’t drive the car fast all the time. also previous owner also took out amp from the car which made all the sensors of the car to go out (traction, abs, parking break and handbreak) however P break works but break hold does not. also i was reading thro 2016-17 model turbos had ecu issues due to knocking and bad fuel quality. i don’t feel the knocking and i’m pretty sure he didn’t update the ecu. which place can update it? i am in khi.thank u for helping 
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