Target Throttle Plate bug?

Gernby · Post by **Gernby** » Thu Jan 14, 2010 2:47 pm

I have an '08 S2000, and am trying to alter the target throttle mapping at various RPM's. However, even if I set the max throttle % to 50, the TPlate is still going to 98%. Is this a bug?

I'm using 1.1.2.7
FlashPro Serial: FP-S2K-US-30040

Gernby · Post by **Gernby** » Thu Jan 14, 2010 3:04 pm

Here is a better example of the issue. In this calibration, I set the max throttle % to 50 across the whole RPM range. Surprisingly, the TPlate is now 73% in the datalog.

Gernby · Post by **Gernby** » Tue May 18, 2010 4:56 pm

I've found another bug with this table. If you limit the target throttle map like this so that there are 3 stair-step "zones" to help with part throttle tuning on an S2000, you'll see that there is something wrong with the columns for the upper columns.

In the case below, you can reach zone 3 by mashing the throttle pedal to the floor, but if I move zone 3 over so that it starts at 75%, you can't ever reach it. Basically, mashing it to the floor will be just like 50%.

Post by **Hondata** » Wed May 19, 2010 9:26 am

With many of the ECUs tables you must maintain the same profile as stock, or there are limitations on the values, otherwise the ECU will determine that there is a fault and run a backup routine. For instance, the WOT lambda compensation table can't be leaner than 12.5:1 With the target throttle table I believe that the ECU needs to see a smooth transistion from 0% to 100%. Given this constraint, it is possible to change the shape of the curve but possibly not to extreme values.

Gernby · Post by **Gernby** » Fri Jun 04, 2010 9:02 am

The ECU does let you change the response of this table quite a bit, but the columns above 67% just don't seem to work right. To get this response, I had to do the same mapping all the way down to 67%.

As you can see below, the TPlate slowly opens up as RPMs rise to maintain a smooth manifold pressure close to 700 mBar even though I have the throttle pedal mashed to the floor. If the TPlate was open 100%, MAP would be about 960 mBar. This really helps with part throttle tuning a lot.