i have mk3 astra with a x16 xel engine (1.6 16v ecotec) had the orange light flickering on and off for the first year of ownership,but had no affect to the cars performance,until exhaust back box dropped off then light stayed on permanantly, so i took her to the local garage who then replaced exhaust and a cam position sensor, but car has not run well since and light reappears,showing a cam position sensor fault,even though they have replaced it twice?
she seems to use more fuel,has lost a lot of power and backfires when coming down the revs?? since i have owned the car i have had to empty the fuel tank because my girlfreind put diesel in by mistake, i emptyd the tank changed the filter and spent three weeks turning her over,eventually she started and ran fine for months ,until now. i have also had the timing belt changed ,after being told that might be the cause, but this was done by a diy mechanic, and since then a slight but fast tapping noise coming fromn the cam housing, when idling....
i have spent nearly 400 pound trying to solve this problem and have not found the problem. please can anybody help me ?? hate to have to get rid, i feel its something minor... thanks