Monday, December 17, 2018

Idle Advanced Settings

Hey, long time no post :|

I'm starting my second year studying Electronics Engineering  - no time for nothing...

The last piece in the idle puzzle is the "Idle Advanced Settings".

Lets talk about it a little first.
In order to help stabilize idle rpm we can use this mechanism too, meaning we play around with timing at idle in order to help too low or too high rpm - we can do that in a very good resolution resulting very stable idle.

BTW, if you ever checked via OBD the timing angle on a stock car you would see that the idle timing is playing around - keeping the idle steady.

Less timing = less RPM
More timing = more RPM

What we want to tune:
MORE timing @ lower then desired idle rpm - so the rpm will rise a little.
LESS timing @ higher then desired idle rpm - so the rpm will lower a little.

Got it ?

You can play around with big numbers and low numbers - both for the delta (the rpm change) and for the timing value.

The Settings:

"Idle Advanced On" : Idle advanced reacting to load change.
"Idle RPM Timing Correction" : Idle advanced reacting to RPM offset from desired idle rpm.

The rest is the conditions to meet in order to start "Idle RPM Timing Correction" or "Idle Advanced On"



Values for "Idle RPM Timing Correction":




You can try different resolutions for the rpm delta and the timing delta.

You hope it helps !

Have fun.

4 comments:

  1. Hello. I just got done building and turboing a 92 Miata and put in a new diypnp that I did myself. I went to start the car and it just cranks but doesn’t start. No girl and no spark while cranking but it does get it in output test mode. I’ve realized that in tuner studio the rpm not synced button is red. Is this why it’s not starting and how do I fix it?

    ReplyDelete
  2. Sounds like the ecu does not get crank/cam signal.
    Check your CAS and the ecu.
    You can send me your msq and I can take a look if it is a configuration error.

    Can you clear this ?
    “No girl and no spark while cranking but it does get it in output test mode. “

    ReplyDelete
  3. I’ve tried to create a composite log of the cranking, but nothing happens.

    Sorry that was supposed to say that it gets no fuel or no spark while cranking the engine. If I put the Ecu into output test mode in tuner studio however the engine does spark and spray fuel.

    ReplyDelete
  4. As i said, your ECU does not see crank/cam signal.
    Check your CAS and your ECU.
    Make sure you the ECU is built right for your cars crank/cam input and that your CAS and wiring is ok.

    if the car starts with the stock ecu then it is only and ECU hardware error or TS ignition config error.

    ReplyDelete