Hey guys,
My brother dropped my car to the shop. We were going to get a tune up. and they found out the car is running lean. Needing a new 02 sensor. But i dont get why it's eating up alot of fuel? it used to blow black smoke as it was too rich. now its just to lean? i've been using pulp (alternatively ulp when the price is up at 90c+) i've fitted headers 4-2-1 and the sensor is lower down the manifold. I got nearly 80-90kms out of about 9-10L city driving straight after i got my extractors. I drove it a few weeks ago and i felt a strong kick at the uper rpm (felt like so much more power at that point). What could of caused this? and what are the reasons o2 sensors are likely to die?