Hello again. This will be long, sorry for taking advantage of your patience..
I went on a drive with Torque logging fuel trims. These are once warmed up and from the end of a run at the respective RPM. I'm not sure what normal is, but it was certainly pinging.
3000rpm: 3.13% long term, -1.56% short
2000rpm: -1.56% long term, 0% short
Sitting at idle: -7.03% long term, 0ish% short (fluctuated between 2 and -3 constantly)
To answer Phillip's #3 point.. I do see the screw in the slot. But there is a lot I don't understand.
- Is it not the crankshaft sensor that is used for ignition timing? I have only two ignition coils, one for 1 and 4 and one for 2 and 3. If it can only fire two spark plugs at once anyway, camshaft information wouldn't be of any use, would it?
- Why is the knock sensor not picking up the pinging? I have heard of cars where mechanical noise is fooling the sensor and making the car undrivable, implying that the knock sensor has a very large degree of control over the timing. But my car runs fine even whilst I hear the pinging.
- If it is the cam sensor that needs adjusting, how do I know what "correct" is? Trial and error?
I'd still very much like to know what happened to those whose Altos pinged when they were new. That suggests that it's something beyond the ordinary, doesn't it? Or at least something Suzuki themselves aren't able to fix?
Sorry for all the questions.