Hey guys, just testing the waters here to see if anyone would be interested in something like this. Basically what it boils down to is electronic idle speed control for the 22re. All the vacuum lines, solenoids, etc to keep the idle speed up on the 22re add lots of complexity, and are sometimes prone to vacuum leaks and failure. Even with all that removed on mine i've noticed that the idle is very inconsistent. Sometimes when i stop the idle is right on at 750 RPM, other times it's around 1000, sometimes, 500, etc. Not to mention the raised idle needed by winching, heavy alternator loads, AC, or jump starting a battery. An adjustable idle could also have nice implications for rock crawling. It would also negate the need for the troublesome and expensive to repair idle air control valve (IACV) on the earlier 22re. I'm learning programming and i'd like to develop a stepper motor (infinitely adjustable) controlled idle valve retrofit. It would work like a modern engine, keeping your idle speed where you set it, and allowing you to raise or lower it at will. It would probably consist of a small controller mounted in the cab, a stepper motor in the engine bay, and a screw that would replace the current idle screw. If i developed these and was able to keep the price under say, $100 would anyone be interested?

 

I have a 22r and a 22re.
I just put a hand throttle on my 22r to step the idle up when its cold outside.
I would think something like your talking about on a 22re would interfere with the tps.

 

Inconsistent? With all of the control inputs bypassed? Gee, could that be a coincidence?

I don't think that's how a modern engine (at least my 2007, which doesn't even have a mechanical connection between the accelerator and the throttle body) works. The idle is supposed to go up and down; for instance faster with cold coolant, or with the AC on, or with the Power Steering hard over. So the modern ECU has sensors on the coolant temp, the AC controller, the power steering pump (starting to sound familiar?) so that it knows when to move the throttle to change the idle to match conditions.

If your plan is to just make a "cruise control" for idle to hold the idle speed constant by adjusting the throttle opening, I don't think that will work.

That's not to say that an all-electronic throttle isn't an improvement over the mechanical gadgetry with which we are currently blessed, but unless your device takes into account all the inputs that should affect idle, I wouldn't see much use for it.

 

Did you try turning off the fan, radio and lights? Or maybe turning the fan to max and hitting the offroad lights, high beams and crank the stereo?
The idle will drop with the load from the alternator.
Check your battery, I'm almost willing to put on the fact that it's not within spec.
Batteries go bad in 1-3 years in hot climate (texas) and about 5 years in cold weather (Canada).

Most people, if they wanted such a product, would spend the $35 for a bike shifter with a cable. The stock throttle pulley on the 22re has room for one more cable (cruise control).


The idea is neat but the fact that a bicycle cable is cheaper and way less complicated and the throttle pedal can also overcome the issue of an idle drop.
Or a simple VSV (vacuum switching valve) and idle up valve/screw from an a/c system that bolts right into place on the 22re.

I was in the middle of building an onboard air system using a york compressor. The a/c idle up system would work perfectly.

 

Ok, just judging interest, doesnt seem like it's worth pursuing. For what it's worth, the idle was just as inconsistent before removing the vacuum lines, varied +/- about 500 RPM. I was of course considering taking into account fast cold idle, etc. Just thought making it all electronically controlled would simplify things quite a bit and it would be nice to have a manual fast idle. Say for example you were wheeling with the AC on and needed to winch somebody (and for argument's sake had lots of off road lights going). In that case your idle is going to drop noticeably unless you have some kind of controller for it. A bike cable works fine too, but this seemed like a much more sophisticated solution. Just set an idle speed and no matter what load is on the engine it stays there. Most even semi modern motors i can think of work this way using a stepper motor. Oh well, I must be the only one. Thanks for the feedback guys!

 

if you have a prototype so we can see it and how to hook it up , that would be nice I might be interested in one. I have an 1985 ,5speed, 22re

 

No prototypes, just testing the waters for interest. Wouldn't be looking to make money on it really, but would need to sell enough to not lose money on them at least.

 

is there a a dial of some type you run in the cab to set a higher rpm