Brand New 4-tec 1503 and P0-326 trips after 8000 RPM


#1

Brand New 4-tec 1503, XX Supercharged, Riva Intercooler, 42 lb injectors, Custom High Altitude Advanced Tune, 4" fresh air intake, riva free flow exhaust, 4 break in hours on engine…

Every single time I rev past 8000 RPM I trip the knock sensor, P0-326. The engine sounds and runs perfect at any RPM below 8000. I am told with the configuration I have I should be seeing 8300 RPM at my altitude… We checked for detonation and bad fuel, no detonation signs, and the fuel is now 105 octane.

My sensors and ecu for this engine are from 2007, and the boat was originally a seadoo speedster 215scic. It has been re-flashed with a new tune as stated above…

My next steps will be replacing the knock sensor, checking the fuel PSI, and injector flow rate, and then see if it happens again…

Anyone have any other ideas???


#2

Knock sensor out of range, so replace that knock sensor first and see what’s up.