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Originally Posted by turbo_c My experience with my MPFI Esteem:
1. Plain Regular 87 Octane: Lots of knocking at RPM below 1500, poor acceleration, poor average (12Kmpl highway, 10Kmpl city)
2. Regular 87 Octance + System G: Some knocking below 1500 RPM, slightly improved average (13Kmpl highway, 10Kmpl city)
3. Speed / Power: Moderate knocking below 1500 RPM, lots of knocking while accelerating in 4th and 5th at almost all RPMS! (This was a big surprise to me too!). 13Kmpl highway, 10Kmpl city.
4. Xtrapremium: No knocking right down from 1000 RPM! Slight knocking below 1000 RPM, but this is really asking for it... Great average... as high as 17Kmpl on the highway once, but normally 15Kmpl highway, 12Kmpl city. Best acceleration too... no knocking = lots of torque!
- T u r b o C - |
Thats because your inital advance is high. With a stock setup this wont happen. Usually people make the mistake of setting the timing on the mpfi just like on a carb engine. What you got to do is short two terminals (terminal E and D) of the diagnostic coupler at idle, then set a timing of 5 +/- 1 degrees of ignition advance.
Looking at the coupler (from the terminal side), sorry abt poor graphics,
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| E D * |
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Hope this helps !!