Hello again and yet another question from me
Going of TPS idle before engine reaches approx 65 degrees the egnition drops to 5 degrees and as a result the cars runs like crap any ide where i might find the table that controls this very annoying function?
regards
John
Just going of TPS idle the ignition drops to 5 degrees
Moderator: Matt
Hey John,
This may or may not be related, but I was doing some messing around with SR20 and GA16 stuff (not sure if CA is the same) and found the following:
They use both AAC and IGN timing to trim idle speed. This can really mess you up when watching IGN timing at idle but makes sense once you realise what's going on. So idle speed is actually quite important. If it goes too low the ECU will open the AAC valve and increase IGN timing. And vice verca if it goes to high. Makes sense really. Obviously target idle speed will be higher during warmup too.
I got caught out on a GA16 that was idling too high. It was pulling lots of timing out to try and decrease idle speed. As soon as I got it idling in the correct range the timing jumped back up to where it should have been.
I really should have known....
PL
This may or may not be related, but I was doing some messing around with SR20 and GA16 stuff (not sure if CA is the same) and found the following:
They use both AAC and IGN timing to trim idle speed. This can really mess you up when watching IGN timing at idle but makes sense once you realise what's going on. So idle speed is actually quite important. If it goes too low the ECU will open the AAC valve and increase IGN timing. And vice verca if it goes to high. Makes sense really. Obviously target idle speed will be higher during warmup too.
I got caught out on a GA16 that was idling too high. It was pulling lots of timing out to try and decrease idle speed. As soon as I got it idling in the correct range the timing jumped back up to where it should have been.
I really should have known....
PL
I will try to adjust the target idle speed and see if I get any reactions.PL wrote:Yeah, that's what I did with the GA. Once target idle was increased to match real idle speed the timing moved up to where it should be.
PL
The rev range for this seems to be matching up with the "Flaged" O2 cells. so once your out of the O2 feedback area the timing starts to act normal again.
Regards
John