Strange Spike in Log

[pric]

Can somebody tell me where this comes from?




Greetings

[Jadzwin]

Hi!

You can ignore it. It is communication issue (PC lost some log frames)

[pric]

Thanks!

[nickbmw]

This is happening to me as well. I can rarely get a complete full throttle run log without these errors.

[Kisielisodd]

Usually communication issues are cause by:

- Laptop connected to charger in cigarette lighter
- Worn/damage USB cable or usb port
- power supply and grounding issues.

From our experience 90% of communication problems are caused by wrong EMU grounding. Rewiring with new cables, to the clear common grounding point solves problems.

[nickbmw]

Usually communication issues are cause by:

- Laptop connected to charger in cigarette lighter
- Worn/damage USB cable or usb port
- power supply and grounding issues.

From our experience 90% of communication problems are caused by wrong EMU grounding. Rewiring with new cables, to the clear common grounding point solves problems.

I am running the laptop on the it's battery, not connected to any power source in the car.
USB doesn't have any problem
The interconnector/pnp harness is made and supplied from the Greek dealer, i doubt it is grounded wrong.

And the problem happens only at high rpm

[ATS_Scott]

He does not mean the PNP adapter wiring, but the factory engine harness wiring may have a bad ground. Get out your multimeter and check the EMU grounds to your intake manifold. I have seen both issues with ground wiring to PNP adapter, and power supply +12v (corroded factory connections). Check them all, it's worth your time.

[nickbmw]

I will check it, it is wiward that it happens only when i get past 7000rpm. Tonight i didn't manage to get not even one log at high rpm without this problem

[ren]

What kind of coils are you using? Any sort of CDI unit?

[nickbmw]

What kind of coils are you using? Any sort of CDI unit?

The stock Denso coils (Honda S2000)

[Jadzwin]

try to replace USB cable

[nickbmw]

try to replace USB cable

Ok, i will do.

Is this related to my rev counter going crazy sometimes when i rev it high? I am in gear full throttle 7-8000rpm and the rev counter goes down to zero and then back up again.

[PSI-Motor]

Sounds like a vibration problem.

[nickbmw]

Sounds like a vibration problem.

ecu vibration? Like bad wiring contact somewhere?