Setting up Microtech lt8s to 4age 20valve - wiring/idle questions

[post]

Hi,
I have searched with little result.
Wondering if someone can help me with the following questions i have before tackling "installing microtech lt8s into my 4age 20valve silvertop"

I only have one aux output and would like it for my vvt, how is idling achieved?
Can idling be programmed in?
Just wondering how the necessary volume of air going to reach the cylinder when the throttle valves are closed and ISCV removed(due to microtech's inability to operate)
The microtech can not operate stepper motors in the 20valve, is this true?
Is there a way i can wire in a fast idle valve from another car without the ECU? example: igntion,GND and coolant lines? If so what car?
What is a handy aux input for the microtech?

Any help at all will be very much appreciated,
Thanks

[cooter]

you dont actually "need" the idle valve at all. only really if you have ac or something that on/off saps power and drops your revs. i did away with the ac etc in mine and just set the idle with the normal tuning of the computer.

and no the microtech cant control steppers. just on off type valves. i rang microtech about this and they said just go get one from an rb30 or something like that. you will however need more than one aux output for this

[post]

cool thanks very helpful and clear. might use a fast idle valve from something for cold start and setup vsv to idle up for head lights and thermofan if i have any issues with revs dropping when extra load is taken.

[MWP]

My best advice would be to chuck the Microtech and get a decent ECU.
Seriously, Microtech ECU's are 10yrs behind other brands.
They are inflexible, have basic 3D fuel mapping, only have 2D ign mapping, handcontrollers and crap to use, no logging, PC tuning software is crap, etc, etc.
They are OK for race & drag cars, but for a daily-driver they dont have the resolution or accuracy to get reliable power & good fuel use.

Anyway....
I used the idle control servo off a Falcon (dont remember the model, mid 90s maybe?).
I removed the stepper, then made an adapter plate to bolt the falcon unit in its place.

[CrUZida]

MWP, the 20V already has a 3 wire PWM ICV.
I'm *fairly* sure my LT8S uses 2 of the spare ignition outputs to drive it (I only have 2 ignitors), not sure if this is acheivable on the 4AGE though.

OP, did you order the ecu or did you buy it 2nd hand?
If you ordered it, you need to find out what each wire it programmed for, it may or may not be set up for idle control. If you bought it 2nd hand, NFI unless the previous owner knows.

I'd also have to say that the driveability of mine shits all over the factory ecu, and only uses about 10% more fuel, but its not really tuned for cruise.

[Cuzzo]

MWP.

My lt10s on my 4agte is fine. Used it as a daily for a couple of months. Fuel use was a bit rich but thats the tune. Oh and cold start with no ISCV or wax pellet worked fine

Pretty much any ecu can be tuned to work good with the right tuner.

[MWP]

Used it as a daily for a couple of months. Fuel use was a bit rich but thats the tune...

Yeah, thats the tune, but youll find that because it couldnt be tuned any better.

They dont have closed-loop, you cant tune cruise ignition timing correctly due to no 3D timing map, and fuel/timing maps only have 5inHG resolution under 1 bar.
You also cant save maps to a laptop, the laptop software will only log for 1min at a very slow 3hz rate, the hand controller buttons are crap (they bounce) and are upside down, you have to send the ECU back to MT to use it in a different car or with different cam/crank pickups.
Oh, and they recently shutdown the only online source of support which was the Microtech forums.
... there is more bad things about the ECU / company if you want me to go on.

[post]

Thank you all for your input, decided to go with out the any control valve.
This unit was brand new, set for 4age 20valve
The LT8s isn't the most equipped, but was recomended by microtech so "BAM" it was done. It has one aux out, one aux in and one ignition output for coil and distributor setup.
Unfortunately i can not simply sell the Microtech and get something else as it would come to too much of a loss. Just going to try it, didn't have any trouble with my previous car.
The ISCV mounted on the throttle body is not for ITB? if so, it only feeds one cylindert? how does that create a stable idle?

[VA61DETT]

-post,

I am currently running the same Ford idle valve as MWP posted, It works 'O.K.' But I found with my LT10 that it is slow to react to load changes, such as Alternator load from thermo fans etc...
I ended up wiring in a second small bypass valve wired into the fan plug, to help with idle control & just fitted a dash pot, in hope to make throttle snap-back a little less aggressive.

Prior to that I used a bi-metallic 5M ICV, but it was not designed to handle boost...

There are a few of nifty kits from Jaycar for controlling things based on rpm / voltage, may be something to consider if you have run out of ECU outputs.

-MWP

Did you wire the Ford valve direct to the MT?
I was a bit worried about the current draw & nasty spikes produced by the valve on turn off, so am currently running it with a transistor buffer.
Did you have any issues with it?
And yer, the MT's are not designed for road cars

-A

[MWP]

I am currently running the same Ford idle valve as MWP posted, It works 'O.K.' But I found with my LT10 that it is slow to react to load changes, such as Alternator load from thermo fans etc.

I have the same problem... yet another limit of Microtech, cant set idle speed adjustment rate.

I ended up wiring in a second small bypass valve wired into the fan plug, to help with idle control & just fitted a dash pot, in hope to make throttle snap-back a little less aggressive.

Nice way to get around the problem

Did you wire the Ford valve direct to the MT?
I was a bit worried about the current draw & nasty spikes produced by the valve on turn off, so am currently running it with a transistor buffer.

Yup, direct.
I was told by the guys on the (now closed) Microtech forums that the MT ECUs can sink decent amounts of current with no problems.

[CrUZida]

Oh, and they recently shutdown the only online source of support which was the Microtech forums.

Probably because they got annoyed with the amount of people asking about the 32x32 map, NA only software, LT16S etc etc, which has been 'on the verge' of release for about 5 years.

[MWP]

... and the fact that the people doing the support were users, not anyone from the company itself.

[post]

just recieved an email from microtech regarding the valve and the forum.
"you can use any early model toy aux air valve ie: 3tg/2tg/18rg and so on.
Sorry I do not operate the forum, you will need to contact Jon from microtechefi.com regarding that"

I feel like winging it for the moment and see how it goes, but at least i can see how things could turn out.
thanks again

[VA61DETT]

MWP

Thanks for the Info

That's totally ballz about the MT forum being closed!
Could have at least left the info up there, now where am I going to find out how to interface LS2 coils to the LT10 >.<

-A

[MWP]

Do the LS2 coils have a built in ignitor?