Point of AFM idle screw?

[JustCallMeOrlando]

I reset mine via the markings on the AFM, using the very scientific method of ruler and my finger. Will do it again with some verniers soon. The car is much happier idling now. I can't help but think it needs to be opened up a tad more.

That said, I'd love to just piss it off completely and get the Microleb. Ahh, money.

[JustCallMeOrlando]

I thought about that too camrygt?. The thing I noticed though was that the AFM sending out a definite signal at idle, so it must be opening enough for the ECU to register something. Ah well, perhaps Toyota just weren't so confident in the ability of their ECU's to do it at the time

[willwal98]

Do I get a prize for answering correctly? Eddi McGuire would have given me $100

Nah...just playing.

[Hydra]

Having played with that screw out of desperation, and the spring inside for the same reason, I can strongly advise that it's best to leave it alone from the start

That said, you can lean out the mixtures across the board using that internal spring but i'd still say it's better to just get a jaycar DFA or something like that - far less chance for screwups. My AFM has no markings on it to indicate the correct height of that screw from what I have seen so i'm guessing whenever I set it up.

[JustCallMeOrlando]

If you look next to the idle screw, on a little flat section just below it, there is two numbers. They will be REALLY faint though, because they didn't stamp them that hard. I had to get some cleaner and give it a little scrub to be able to see them. Mine had 66, I set mine as close to 16.6mm and its behaved markedly better as a result.

As for the DFA, I'm still dubious whether or not it can be used.

[Hydra]

I've put the DFA on my car, I could only test it at idle but it did make a difference to the mixture when I richened it up a bit (ouch my eyes!)

(going out to look at AFM now!)

[JustCallMeOrlando]

Oh for sure. Mine appeared to work. I could happily play around with the mixtures at idle. As soon as I took the car for a drive though, anything approaching boost was emt with uber stutters.

Hurry up and take it for a drive to check for me! If yours doesn't do it, then I have a problem with mine! Have you tried driving around on pass-through?

[Hydra]

Those uber stutters happened to me in a way, I think that was loose exhaust manifold - turbo nuts though.

I just want a microleb too, far less 20 year old factory ecu headaches, way more cool stuff to play with.

[JustCallMeOrlando]

Nah, mine is directly related to DFA, as soon as it's removed, the car behaves perfectly.

Have you driven the car with the DFA in just pass-through mode?

[Hydra]

I did a while ago, it was fine from memory.

I would need to connect the bugger up again to test it again, which means pulling apart the dash... Did that too recently

[andyroo]

If you look next to the idle screw, on a little flat section just below it, there is two numbers. They will be REALLY faint though, because they didn't stamp them that hard. I had to get some cleaner and give it a little scrub to be able to see them. Mine had 66, I set mine as close to 16.6mm and its behaved markedly better as a result.

As for the DFA, I'm still dubious whether or not it can be used.

Where exactly is the idle screw, my idles horribly, drops to 8-7-6 hundred then sometimes stalls due to the misfire.

Andy

[JustCallMeOrlando]

I did a while ago, it was fine from memory.

If you could check that'd be good. I'd love to be able to use mine, but she no worky atm

[JustCallMeOrlando]

Where exactly is the idle screw, my idles horribly, drops to 8-7-6 hundred then sometimes stalls due to the misfire.

Andy

The one this thread about is on the AFM itself, and unless it's been removed, there should eb a cover over it.

[JustCallMeOrlando]

I would need to connect the bugger up again to test it again, which means pulling apart the dash... Did that too recently

No really, please do, this boost cut is driving me nuts

[Lambolica]

Where exactly is the idle screw, my idles horribly, drops to 8-7-6 hundred then sometimes stalls due to the misfire.

Andy

That could be the ISCV could also be a cause of this and should probably be cleaned before playing with the AFM screw.