so i was driving this morning to my office and had a yellow goin red traffic light in front of me....so i accelerated pretty hard to jut make it. all of the sudden i noticed the the caution sign on the gauge cluster went on and also the CEL !?!?!?! i was like wtf....i couldn't turn around or park the car for next 1 km or so and drove the car normaly.
after about 500 or 800 meters both of the lights went out!! the car behaved as normal during all of this.i tried again to push the car a bit "harder" than you normally do and i revd it till 4k in 3rd gear and again both lights came on and went out after 1 min. (or even less). so i tried it to drive the car normal till i could make a halt. again i accelerated till 3k this time and again both light came on and went out. still had to drive the car for about 5km or so and tried it once more but nothing happened!!
to find the cause for this is pretty hard without nowing the car or check it of course, but what could have caused this problem? can i read out the CEL if the light went out again? not sure about that.
i may have already an idea of what it could be but i'm not sure....so here's my guess:
if the oxygen sensor detects a "leak" during hard acceleration but not under normal driving condition because the exhaust is soaking somewhere air in...what that cause the lights to go on and go out if you drive the car normally because the leak than is sealed again????
because it only happened when i was letting the gas pedal go to shift into the next gear!!
i have a universal hks silencer fitted to a already exsited Invidia cat back....the inner silencer on the hks has some gap around the tail pipe like 3-4 mm!!!!!! so it's not sitting pretty well and it's vibrating in idle....could it be that after all the exhaust gas is flowing out of the tail while accelerating and than let the gas go to shift there is some air sucked in trough this little gap and causes the O2 sensor to get a wrong reading??