DCYota

I have an 88 22RE Pickup. I've been reading on threads here and there about adjusting the A/C idle up screw to make sure the RPMS go up when I hit the A/C button. On my pickup, when I hit the A/C button, the idle drops down and really bogs down the truck to the point of almost stalling.

The problem is, I don't have an A/C idle up screw like the one pictured here:



Am I supposed to have this, or was this on earlier 22REs? Of course, I have the VSV, and it may be crapped out...I have to test it I suppose. But I just wanted to make sure whether or not I was supposed to have this screw or not. There's a block off bolt in that spot on my intake instead.

Thanks for any help anyone can give.

dcg9381

Have, I have an 88. That valve should be there.
Do you have the VSV associated with AC? It might be possible to find another way to rig it up to meter the vacuum leak needed for "idle up".

4Crawler

iTrader: (3)

Maybe you have an aftermarket A/C system, or maybe some previous owner removed the part. You could probably grab one of those idle up valves at a junkyard.

DCYota

Dammit...I knew something was supposed to be there Well, the only thing I see with the A/C system that's changed or not original is that it had a conversion done to r134a back in 2000. Well, time to start combing the yards

Thanks guys.

lftd_86_yota

mine did the same thing, there's a vacuum diaphragm than needs replaced, it's mounted on the top of the valve cover on the passenger side. I believe it's brown. If it fails, the truck will be struggling to keep up with the a/c, like yours is doing. I guarantee you that's you're problem, you said you had it narrowed down to this, how do you test one?

DCYota

Yeah, you're referring to the VSV (vacuum switching vavle). Here's the test procedure for it:

http://personal.utulsa.edu/~nathan-b...24vacuumsw.pdf

My main problem is that I'm missing the A/C idle up adjustment screw/unit completely. Someone removed it sometime between 1988 and today So I have to source one from somewhere.

iamsuperbleeder

Wait a minute... you have the VCV still? Where are the vacuum lines running to from it? They should both trace right to the idle-up valve (or where it should be); unless of coarse the lines are gone too...

Check eBay; I bought one off there from a Celica (I think) with the lines and VCV for about $15, and it worked perfect; I just had to change the plug-in for the VCV, and add a "T" fitting to run a line to the power steering idle up thingy, which if you don't have power steering you don't even have to worry about.

DCYota

Yeah, I'll have to take a pic of my engine bay and post it up here tomorrow...because you make a good point. But I know I have the VSV still (with the brown piece on one end). I'll have to trace the vacuum lines to see where they run. What I do know is that where the A/C idle up adjuster "should" be, there's a rust colored bolt or plug screwed into the EFI housing now.

DCYota

Alright, problem solved. I got a fast idle adjustment unit/screw off a 22RE that was pulled out of a 4Runner that my buddy had behind his house. I also got the A/C VSV that I didn't have on my truck at all. Turns out I was mistaking another unit on top of my valve cover for the A/C VSV. So I got both and will be hooking those up tomorrow. The only thing I have to go pick up is a length of vacuum hose to run for the power steering VSV hose that goes into the fast idle unit and exits to the throttle body. About the A/C VSV; it turns out I had this black connector in my engine bay that went no where. It was zip tied to the wire that connects to my coolant temp sender, but wasn't hooked up. So, I figured maybe it was just a connector that was used for a California spec'd 22RE...but yeah, it's for the AC VSV It's nice to finally be able to figure all this stuff out. Thanks for the input guys...and 4Crawler, thanks for the great pictures of the 22RE on your site. This is what's helping me determine where all of my wayward hoses are supposed to go

celica5thstreet

I have an 84 Celica GT and it seems my engine is not idling up when the A/C compressor kicks on. I just started reading all this about the VSV and idle up valve and am heading over to the shop to check on those items. I specifically wanted to know if anyone knows what this thing is? The hose dead ends into a "filter" and does not hook up anywhere else. Should the hose be connected to something after the "filter"?

Thanks

streetlancer

iTrader: (1)

I was just about to ask this same question the other day, but my truck is a 22r. I have factory a/c and whenever turned on the engine bogs down. I found the vsv thing that plugs to the compressor but the vacum lines lead nowhere. They're not plugged into anything, just sitting there, and i am having a hard time figuring where they go since i don't see anything missing a vacumm line. Any input or better yet pictures will be appreciated.

4Crawler

iTrader: (3)

Dashpot:
- http://www.4crawler.com/4x4/CheapTri....shtml#Dashpot

cbecker

Hey sorry if this has already been gone over on a different forum, this was just first AC page I found. My AC kicks on and everything and ideals up, but it just doesn't seem to blow that cold of air. My last Toyota was ice cold, any ideas why this might be? Could it just be something like not enough freon?

iamsuperbleeder

probably low on freon; has it been converted from the old r12 to r134? You can pick up a fill hose form an auto parts store that has a gauge on it for r134 systems, and if you can stick it on the low pressure side, then it's been convererted. If it will NOT fit, then it's probably the old r12 system still

cbecker

Ok cool thanks, I have no idea which one I have tho lol.

celica5thstreet

You are definitely low on freon if it blows cool, but not cold. Mine was the same way, on top of the compressor not kicking on due to the low idle. After testing the VSV and seeing all the correct checks, I adjusted the A/C idle up and now the unit cools properly at idle. It is blowing right at 40F from the vent at idle and 2000 to 2500rpm (my cruising rpm in 5th gear).

I added about 1.5 cans of freon before the bubbles went away in the system and the A/C gages were reading properly on the high and low sides. One thing you could check is my dryer had a clear sight-glass on top of it that when you are low on freon, you should see lots of bubbles blowing by that sight glass. Mine is an 84 Celica though . . .

Thanks for all the help everyone.

cbecker

Thanks for the info celica5thstreet, yeah ill have to check out the freon levels and see where its at about. Hopefully mine isn't to different, but I also have a repair manual so I'll have some other reference in addition.