Originally Posted by Hrsturbo
but how does this increase the fuel by adjusting the C0 when you increase boost?? MOT people always adjust it at idle for emisions not under load so surley it can't change the ratio under load??
if a tuner tuned the car with the C0 screw to get it to fuel at a set boost pressure under load then it would mess up idle no??
That's exactly what I don't understand either.
But I guess it's a bit like that: The KE-Jetronic adjusts fueling itself. If it's in good health it will deliver the right amount of fuel even at high boost levels and even with a std CO% setting and good idling.
If they (the tuner) detect that it's running lean at high revs they'll not simply turn up the CO screw but rather search for the fault in the injection system, e.g. a knackered metering unit or injector.
So can somebody confirm that it's like that? If you have a 100% intact injection system will it handle high boost levels even if it's on a std setting?