So that table isn't so bad around town. I didn't have any of the problems that I did after being on the highway except a little dip in rpm when I go to neutral coming to a stop. While not ideal, I don't really mind cuz it doesn't seem to effect anything.

 

Here is my current understanding of the idle RPM, desired ISCV and the stepper table ...

When the car is in neutral or the clutch is depressed the car seems to go to the desired ISCV + an offset value (likely the stepper table value). If that doesn't reach the desired idle RPM the ECU adjust the stepper to reach the desired RPM.

If you are getting the bouncing idle you likely have the ISCV tables too high/low. If my assumption is correct and the using EvoKid's stepper table would require a higher desired ISCV than mine. So, if you tuned the ISCV for his table it would be too high for mine and cause idle issues.

 

I started poking around the ISCV initial position tables and found that the one for neutral-AC On had the highest two cells raised double from the stock values which I believe could be why it would just hang around 2krpm. I changed those back to the stock values.
I'll toy around with it this evening.

I'm also looking forward to what you learn in your other idle thread.

Thanks for all your help.

 

Okay, the post I made above doesn't seem to be accurate based on some new ISCV tables I've added. They were found in the other thread but I never added them. So, I'm still unsure of the actual relationship of the ISCV tables and the stepper map.

 

Adjusting those Neutral-AC on values back to stock definitely helped a ton. Really the only problem I have now is when the ACs on it dips down to about 500rpm for a little bit then goes back up to normal idle. I can definitely live with that.

 

I know I'll probably catch hell for not reading all 22 pages...but from the pages I did read some of you have the same problem I have but mine seems to be worse.

My 8 will actually not just hang or climb 400 RPM. My RPM will actually keep rising up to 2000 RPM. For all the smart @$$es...no my foot is not on the gas, no im not hitting the clutch before I get off the gas, nothing like that. Actually I can take my foot off the gas and put it flat on the floor while the RPM's climb. Like others, its not all the time. It happens even when not driving hard. I can be cruising on my way to work and shifting the car like you would if a cop is right next to you and BAMM! the RPM's shoot up 2000-2500.

 

Mine does that too sometimes. It doesn't do it as much as it used to, but it will still do it occasionally. It's pretty damn annoying when you're sitting at a light idling at 2000rpm.

 

I don't idle at 2000...I'll be driving and when I go to shift from any gear to the next, lets say at 4500RPM, when I shift it will climb to 7000 RPM's. I even noticed one day I didn't take it out of gear, just put it in 3rd and got the RPM's to about 5000 and just took my foot off the gas and had both feet flat on the floor and it kept climbing like I still had my foot on the gas.

 

I can't stand this when driving my EVO. I'm willing to let a reputable shop take the car for troubleshooting, if they can fix it for me. I just want it fixed. Maybe Scott @ TTP needs to drive it and actually see whats happening to see what the deal may be.

 

That sounds like an accident waiting to happen, yikes.

 

Set your biss/SAS?

 

Maybe try some Deep Creep in the manifold/TB. That's a big issue and sounds mechanical to me ... BISS may be off or something just gunked up in there ...

 

yeah check your BISS, its easy now.

then fiddle with the idle stepper table.

 

I will look into the sas this weekend. It only does it occasionally, much less than it used to actually. It only seems to do it after I've been on the interstate for a while, like maybe >45 minutes. Turn the car off and it's fine.

 

I see. That's a much bigger problem than what I'm having. Makes me thankful for how well my car does run. (sorry)