Hi All,
After replacing the ECU, in the next race I stopped getting a signal from the throttle position sensor. So I retired on lap 3.
The problem seems to be that the engine harness does not allow there to be any slack in the wiring. If it is attached to the fuel rail as specified, it is quite tightly stretched from the crank position sensor to the throttle position sensor. The stress on the wires can disconnect the CPS connector. I've been told by HPD that lengthening the wires would not be a violation of the rules.
I'm very disappointed in Honda. In a production car if an ecu has a 5% failure rate, there is a recall, and production is stopped until the problem is resolved. You may notice the current uproar over the GM ignition switch failures.
I've had my car fail 2 out of 4 races since the conversion. HPDs solution is to carry a spare ECU and wiring harness.
Regarding the ECU failing after a hard hit, when we designed the first accelerometer based airbag trigger at Lucas in the 90s, we tested our PCBs to 1000g shock. This is more than you get if the frame hits a wall at 100MPH.
After replacing the ECU, in the next race I stopped getting a signal from the throttle position sensor. So I retired on lap 3.
The problem seems to be that the engine harness does not allow there to be any slack in the wiring. If it is attached to the fuel rail as specified, it is quite tightly stretched from the crank position sensor to the throttle position sensor. The stress on the wires can disconnect the CPS connector. I've been told by HPD that lengthening the wires would not be a violation of the rules.
I'm very disappointed in Honda. In a production car if an ecu has a 5% failure rate, there is a recall, and production is stopped until the problem is resolved. You may notice the current uproar over the GM ignition switch failures.
I've had my car fail 2 out of 4 races since the conversion. HPDs solution is to carry a spare ECU and wiring harness.
Regarding the ECU failing after a hard hit, when we designed the first accelerometer based airbag trigger at Lucas in the 90s, we tested our PCBs to 1000g shock. This is more than you get if the frame hits a wall at 100MPH.
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