First RT Tuning Experience - OSE 12P BCLF based Camaro

[redcamaro]

um? that table is the spark advance table. idle AFR is the one I mentioned a few posts back - "Map A: A/F Ratio - Idle A/F Ratio vs Coolant Temperature"

I don't get this part because that table seems to be an ECU Command table.

Back to where the guide is not clear, there appears to be 3 critical variables:
1. Initial IAC Motor Setting (Steps),
2. IAC Motor (Nominal Steps) at Normal Idle,
3. IAC Steps Increase when High Speed Fan comes On.

1. and 2. and how they work/interact, are not explained enough in the guide.

How to set them up properly?

[redcamaro]

no idea but i want some hahahah

Maybe you should consider writing another version of the guide when you're not stoned.

[Jayme]

mate what the f#$k are you trying to do????

you said you want to play with idle AFR which is the table I just said... now you want to play with IAC settings??? those variables are to do with the IAC.. IAC controls idle speed ... so do you want to play with idle speed or Idle AFR?

how about explaining in a bit more detail what you are trying to do and stop just badmouthing people who genuinely try to help you and dont give you some magical fairy dust answer you are looking for !


as for badmouthing mods, what are you trying to start a flame war? holden202 has gone well out of his way to try to write a guide for newcomers to help explain some basics. if you dont like the guide, dont read it. dont bite the hand that feeds you. dont post up some obscure question then dismiss the correct answer. maybe you are such an expert now you can write your own guide? didnt think so. pull your head in.

[antus]

no idea but i want some hahahah

Maybe you should consider writing another version of the guide when you're not stoned.

Thats not even funny. Why do you have to take a joke, and turn it in to something offensive (and against someone who has given so much, for nothing?) That attitude will only destroy our community and I need to prevent that. You have had more than enough warnings. You are banned from the site. You can still visit as a guest, and read content here, which will probably be better for all of us. Goodbye.

[Holden202T]

um? that table is the spark advance table. idle AFR is the one I mentioned a few posts back - "Map A: A/F Ratio - Idle A/F Ratio vs Coolant Temperature"

I don't get this part because that table seems to be an ECU Command table.

Back to where the guide is not clear, there appears to be 3 critical variables:
1. Initial IAC Motor Setting (Steps),
2. IAC Motor (Nominal Steps) at Normal Idle,
3. IAC Steps Increase when High Speed Fan comes On.

1. and 2. and how they work/interact, are not explained enough in the guide.

How to set them up properly?

i would just like to clear this up for anyone that reads this.

firstly i would not class these items as something that needs to go into the basic tuning guide because i personally feel they are settings that would go in the advanced tuning guide if anything.

1. Initial IAC Motor Setting (Steps) - This setting is only for things like when keying on the motor it will set the IAC to this setting, once the engine is running this is no longer used and the ecm will use spark timing and IAC changes to keep the motor at the desired idle setting you specify in the desired idle tables.

2. IAC Motor (Nominal Steps) at Normal Idle - I'm not sure what this one is, the only thing i can find is "MAP Params - Default MAP Nominal IAC position for normal idle" if this is the one being referred to, i believe this is if the map sensor has failed and its running on the limp home values it will use this as a fixed setting ???

3. IAC Steps Increase when High Speed Fan comes On - This again is an advanced setting and should not normally need to be changed unless you do something like put twin thermo fans on the motor .... what this is, when the ecm activates the high speed fan at the same time it will increase the IAC steps by this amount to offset the extra load the fans put on the alternator.

for anyone wanting to get their iac settings sorted out i would suggest the following:

edit one or all of these tables to reflect the numbers you want.

IAC - Desired RPM in Drive Vs Battery voltage
IAC - Desired RPM in Park/Neutral Vs Battery voltage
IAC - Desired RPM for manual trans Vs Battery voltage

for example increase them all by 100rpm.

now get your engine up to temperature, in park/neutral with no accessories on, then use tp5 dash screen to view current IAC steps.

so say its at 40 steps, then slowly screw in the idle screw on the throttle body and you should see the IAC steps slowly decrease, keep going till you get to say 20 steps.

This should be all you need to do, anything else would be changing VE or spark to suit cam changes ETC, but the IAC is fairly basic, and it will then re-learn points, ie. put it in drive and leave it sit there for a bit and you'll find the IAC will adjust to where it keeps the engine at the desired idle, then put it back to neutral and same again, it should only take a few minutes and it will be happy.

I hope this clears some stuff up and like i said above, any of the other variables for IAC i would consider to be advanced modifications which shouldn't be needed on most vehicles.