Hondata

Hello all,

- Serial number = 8489
- KManager version = 1.4.1.0
- The calibration = sorry deleted it as I didn’t want to accidentally re-use it.
- A datalog of a problem =available on request
- what sort of vehicle = K20a re-powered EG4
- what sort of ECU = PRC
- anything about the car which has been modified from stock which may affect the ECU = Hybrid k swap header & exhaust, 3” straight pipe & filter intake arm. Hybrid adaptor harness.

Description of the problem:
• Car ran great with a safe calibration at a race meeting 2/3rd October
• Went to a dyno tune (bolt on hub type) 12/13th October – good gains and a lot smoother mid range
• Went to next race meeting 23/24th October and car ran very pour – missing and rough running all weekend.
• Car dropped back to Local Hondata dealer 28th October, corrupt firmware discovered and corrected, calibrations (first one & dyno tune one) both corrupt and deleted to avoid mis-use.
• Tested car at circuit 6th Nov and car now better than ever.

Whilst we have fixed the problem, we do not know what caused the firmware & calibrations to become corrupt.
The only things we can come up with are:
1) The car was originally setup with a laptop running windows XP and the laptop used my the dyno tuner was windows 7.
2) We have also since discovered that a/f sensor wires were round the wrong way (a common USA/NZ difference) but it wasn’t being used, i.e. ECU was in open loop.

Has anyone else come across this?
Any suggests?
Could Windows 7 have caused this?
Could the incorrectly wired A/F sensor have caused this?

Have decided that if/when the car needs more tuning my windowns XP laptop will stay with the car, be used for tuning and no other laptop will be plugged into the K-Pro (more as a safety measure than anything).

Thanks in advance
Brent

What do you mean by 'corrupt firmware'? Also, if the calibration was corrupt, was this from downloading it from the ECU?

In any case, with engine swaps 90% of the problems are caused by the wiring into the vehicle. There often are missing grounds, ground loops and other crazy random stuff.

See:
http://www.hondata.com/techk20wiring.html
http://www.hondata.com/techk20swapgrounds.html

I don't know exactly just feeding back what was told to me. To fix it Andrew had to completely clean the ECU & reload everything including the firmware.

Once the ECU was sorted, then it wouldn't take the original calibrations for some reason, so he tried other (3rd) calibration and it worked fine.

The conversion was done by Andrew Short (Rally AS) in AKL NZ, believe he is well aware of the wiring requirements (including grounding) and have no reason to doubt that it wasn't done right, but then again we are all human.