RPM problem - Tach or distributor
10-29-2014, 04:30 PM
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RPM problem - Tach or distributor
My car (ES8,D15Y4) can only redline to 5500rpm (ie. tach readings from the gauge cluster), but when I read the rpm signal from an OBD-II scanner, the rpm actually shows 6800rpm (ie. the redline).
Therefore, I am wondering how the tach and ecu receives its signals and what could have caused the discrepancy in RPM readings. The RPM readings on the tach is off by a constant ratio (ie. 6800/5500=1.24) with respect to ECU at other RPMs.
Therefore, I am wondering how the tach and ecu receives its signals and what could have caused the discrepancy in RPM readings. The RPM readings on the tach is off by a constant ratio (ie. 6800/5500=1.24) with respect to ECU at other RPMs.
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