OK, and is it at all possible to do it by simply adjusting the camshaft position sensor? I was told that a timing adjustment could be done very quickly and easily by simply tuning this sensor slightly in order to change where the car thinks the #1 piston is (hence changing the firing timing).
I want to retard the timing slightly to eliminate engine ping, but there doesn't seem to be any way that the camshaft position sensor would help..?
You need to figure out why it's pinging.. It's a lean condition.. Either you don't have enough fuel or your getting a vaccuum leak.. Or even possible that your timing belt is off a tooth.. You shouldn't really mess will any of the sensors just because your getting a ping.. The ECU will adjust timing its self. But when it runs out of adjustments then there is other problems.. :evil:
Well it's a bit more complicated than that, I just found out that apparently the previous owner rebuilt the engine and replaced a few things, which now means the engine needs the timing retarded by a degree or so to compensate. Of course when I got the timing belt replaced recently I didn't know this and the mechanic wouldn't have either. So I'm pretty sure that the car is set to the correct timing at the moment for a 97 lantra, but that's not exactly what this car is anymore! The pinging is pretty minimal, and occurs at lowish revs when under high load. I can usually drive such that I avoid pinging but of course it would still be nice to fix it.
So yea, there's a small chance it could be something like lean fuel etc, but I wanna try retarding timing a little just to see if it helps, and apparently it can be done very easily via the crankshaft position sensor.. if not is there another way to do it that isn't too mechanically demanding?
Otherwise any other simple checks I can do that may help pinging would be good...
BTW: with the newer cars, you can't just retard the timing a little without a piggback timing system. You'd have to jump an entire tooth in the cam, which would probably enhibit your car from starting.
ok i can avoid pinging by not going full throttle at low revs... if a lean fuel mixture causes pinging, and i can avoid pinging by not supplying too much air, does this mean my fuel input is limited? ie. at low revs i cant get enough fuel for the amount of air i can supply, hence lean mix, hence pinging? is this likely?
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