Hey folks,
Got an 05/06 RSX K20Z1 w/NSN4 Trans, running correct high $$ 05/06 KPro ECU. This is an engine swap into a racing chassis. The only "factory" wiring we're using is the ECU harness and a lopped off car-side E-connector. Car was dyno tuned and is running great, no issues except using Marshall electronic gauges including Speedo, but can't get the speedo to calibrate correctly.
It displays ~12,000 clicks per mile, but when it comes off of Cal mode it looks like everything's set correctly, however anything over 5mph moves the speedo to 58mph and stays there until the car drops less than 5mph.
Replaces VSS with new, but same problem continued.
Driving speedo from #3 on Engine Harness per Hondata diagram, but notice #25 on ECU E connector is also labeled "Speed Sensor Output" but no connection shown.
Marshall has checked out the gauge and says all is fine.
We did a similar conversion with a stock ECU driveline about a year ago, and speedo calibrated correctly, with only about 4,000 clicks / mile.
Anyone got any ideas?
-M
Aftermarket Speedo Cal Probs
Don't have a direct answer but I'd start with an oscilloscope and see what signals are where.
Mid-engine K24 turbo Locost, http://www.midlana.com