Hmmm, looks like the 05's are also different than the 03/04 and the IX's... here are my values (I put them to the right of 20psiMr's post on page 11 - so it goes 03/04, then IX, then 05's with the upper table being "Desired ISCV intial step position with AC off-neutral", followed by ac off-drive, then ac on-neutral) and then my ISCV lookup table.




Smoggy, did you change the desired iscv tables as well to match the new values in the lookup table? The way I understand it is the desired iscv initial step position tables have values that correspond to the ISCV lookup table - so if you change either set independently, it is going to act funny. Could you post the corresponding desired iscv tables so I can try the combination of lookup/desired and see how it works?

I've been messing with my idle a bit for the new cams and it still has problems on throttle release while driving (the rpms drop very low then start bouncing up).

 

I used 65s from the 312 row down. It eliminates the throttle hang and gives you a lil bit of a cold start (approx. 1000-1100 rpms).

 

I need to edit my post above a bit. I'm still getting a throttle over rev on partial throttle lift off, but it is aittle less severe. I'll post up the iscv tables later tonight, but it looks like I have some more tinkering to do...

 

Thats because the locations for the desired ISCV are wrong

 

Guys is it confirmed TPS as the X axis???

From the code it looks like COOLANT_TEMP is the X-Axis..

Does this make more/less sense to anyone?

 

That is how AutoXer graphed it too. I was wondering the same thing. Very interesting thread. I hope this can be fixed it is quite annoying. I would think we would need to find the correlation between RPM TPS and Idle Stepper

 

I was thinking about this more and it would have to be coolant temp since at idle the TPS should always be 0. Plus if they are coolant temp it would make more sense with the range being 8-81 in celcius (46F - 177F). If this is the case to fix cold idle AND throttle hang you should only have to manipulate the bottom right hand corner from 67-81 since A) all the stock values will work for 8C and B) lower up until operating temps 67 - 81C. You shouldnt be revving that high below those temps anyway.

I am going to try this tonight. It is getting cold here, almost outside the 46 degree range.

Edit: I changed the map definition to reflect temp instead of unit and it ranges from -32 c to 41c which makes more sense.

 

yup someone confirmed that its coolant_temp on the X-axis and load on the Y-axis... which makes more sense...

 

Oh i didnt even consider load. That does make more sense.

 

can someone fix the definitions to include the proper axis and scalings?

 

just change the definition in ecuflash, rename the X to "Coolant Temp" and change the scaling to "Temp", then rename the Y-Axis to "Load" and change the scaling to "Load16"

 

sick, thanks tephra.

 

on Y axis load16 does not look right I can't make sense of it, try volts16 (0 to 5.08v)

 

Volts wouldnt make sense though. Then again, like mikie was saying dex, a 3d idle stepper table doesnt make much sense.

 

volts don't make alot of sense, was volts just a stab in the dark? I could see volt's as being some measure of electrical load, but i think that's reaching. Tephra is saying that someone else has confirmed that the Y axis as load.

i just googled IACV/ISCV/IAC. and found this quote

i'm trying to learn as much as possible about IACVs and found this PDF interesting. It describes how the initial position are implemented, basically the stepper is positioned when you shut off the engine, the ECU stays on for a couple more seconds to reset the valve position for the next startup.