Join Date: May 2008
Location: Houston , Texas
Was there any code that yu got? As in engine performance , system lean bank 1 sensor 1 or anything like that. There are lots of things that can cause that issue and not directly be the HO2Sensor. As in the model yu have is an HO2S , not an O2S . HO2S do not dramatically fail as fast as the older non heated O2Sensors. Depending the engine series , 4G93 had a version with auto hydraulic valve lifters while many other models did not. The majority were manually adjustable. On the GDI engine a few things can cause an erratic idle , which will not as much make that big a differance on regular petrol models. A vacuum leak is one. This will cause unequal air to fuel ratio and higher than normal air volumes into certain cylinders. Thus burning to lean in certain cylinders and making the idle , rough and uneven , erratic , and also would set a engine performance code , such as system lean bank one , or the frunt HO2S.
Also an extremely clogged fuel filter. Spark Plugs. One main thing that can also , which would ve very noticable on teh GDI engine , is if an model with hydraulic valve lifters , and a few of them have failed , it would cause unequal volumes of air to enter the cylinders , thus an erratic idle etc. Or if the manual adjustment is disrupted , or needs to be readjusted or set , or if the lock nut for the adjustment has backed off , , this would also cause as with the hydraulic lifters , noisy valvetrain operation and also an erratic idle.
You Look Like I Need Another Drink