Im not adding my maps but please have a read about how these ecu's work on fz1
The problem with this bike, is the ECU Maps used by Denso.
It's unlike any normal tuning strategy they use.
From factory the bike uses Air Density to control the closed loop 2% to 18% throttle position in the form of the IMAP(intake mass air pressure sensor) and the o2 sensor.(This is where our throttle snatch issue is)
Even if you disconnect the o2 sensor and run a o2 eliminator, the ECU will still be using the IMAP to control 2% to 18% throttle.
Under different load conditions at these throttle openings the bike adjusts it fuel and spark maps accordingly via IMAP
You cannot get around this. Even if you use a PowerCommander, the ECU will always fight the PowerCommander in the closed loop 2% to 18% throttle.
If and when you have your ECU flashed, the tuner needs to get rid of the closed loop 2% to 18% and change to open loop.
Another very important step is, the tuner needs to change is the ECU strategy to Speed density (remember they are from facory air density)..
This way they ECU determines what needs to be done via TPS position and RPM
This is what the PowerCommander uses .
I've spent many dollars and many lost hours trying to fix the throttle snatch once and for all.
I tried various tuners who promised me a fix with their flash tune.
After spending close to $3000.00 Aussie dollars on time wasters and dyno's, I was ready to trade her in on something different.
But I couldn't let her go. This was her only fault.
I was told to speak to a Tuner in Western Australia.It was my last chance and you wouldn't believe it, he sorted it out and explained to me the above issue.
I now have no more throttle snatch but need to watch how quickly I turn the throttle as she will spin the rear tyre or lift the front without hesitation.
I actually enjoy riding her now.
I never really did before because of the throttle snatch.
And another upside of all this is that my fuel economy is now on average5.1 to 5.7 l/100km.
