Thanks for the response, Phillip. However, I've already investigated these things. Amongst other little things, I've checked all plug gaps 10,000 times (0.035"), seen the carbon (or lack thereof) on the pistons with a borescope, replaced the ignition leads, cleaned the EGR valve and replaced the knock sensor even though the old one appears to work anyway. The fuel trims are normal, there are no codes and it runs totally fine other than the pinging. The ignition isn't adjustable, it is entirely electronic. The only thing left, really, is the ECU. This is why I was curious about the idea that ECUs were being replaced for a pinging issue when new. At the moment, I'm just driving around sounding like a tumble dryer of ballpoint pens. Or spending too much on expensive petrol.Reasons for engine ping:
- Ignition too far advanced,
- Lean fuel burn,
- Plug gap too wide,
- Carbon in piston
Fuel trims normal as in +/- what?The fuel trims are normal, there are no codes and it runs totally fine other than the pinging. The ignition isn't adjustable, it is entirely electronic.
Unfortunately, my scan tool at present is an ELM327 clone with Torque on my phone. Thus I've no way to fix the timing, nor monitor Cam/Crank correlation (I do have an oscilloscope but only with the one channel), although surely if the latter ever went out it would trigger a code? At warm idle the timing is between 8 and 9 degrees. How does one go about adjusting the cam sensor, in any case? It seems fixed at one angle.Fuel trims normal as in +/- what?
Base ignition timing can be adjusted, you have to fix(stop auto timing) the ECU first, then adjust the CAM sensor.
Most Pro scan tools have the fix capabilities...
Have you monitored the CAM/Crank correlation while under load (PING)?
- although surely if the latter ever went out it would trigger a code?
- At warm idle the timing is between 8 and 9 degrees.
- How does one go about adjusting the cam sensor, in any case? It seems fixed at one angle.
- I don't remember the fuel trims but I will record them when I'm next out and let you know. Thanks again for the advice.
Thanks - I didn't know about SZ viewer. It says my ELM scanner is fake and not usable, but it's good to know about anyway.oops, look like philip posted same time as me
cam / crank correlation will not throw a code until the engines basically not running[...]You could try SZ viewer but it will depend on the ELM unit as to whether you get any more meaningful items to view