Josh_Br

I borrowed this photo from a different thread, but it looks the same under my hood. What are these two things?

One of them makes a whistling sound on my truck (the one on the left). I would rather it did not, and was thinking about replacing it. Is it normal for it to whistle?

Thanks,
Josh

Gizler00

iTrader: (1)

Vacuum switch/valve . One on left is for ac idle up valve, and I can't remember what the other one is for being that mine has been removed.

toyota4x4907

The red one (right) is the VSV for the PAIR system.

Whistling sound? You probably have a leak.

Josh_Br

Thanks guys. Yeah if I manually slide the left (front) valve out it stops, but when it sits normally it whistles, kind of like static in speakers or a worn out pulley.

Pat8942

More than likely the switch has a small crack and is leaking vacuum.

Josh_Br

Ok, can you just buy these things at an auto parts store? Thanks

KBar

while rebuilding my friend's 22re these were broke so we took them to autozone, and advance and they couldnt find them even after i told them exactly what they were

Josh_Br

Ok. Some people just remove that whole system, right? I'd like to learn more about that sometime.

KBar

Ive searched here and pirate about these and all I've found is that these are for power steering and AC when the engine is just idleing

youngtoyotatech

Check the hoses for cracks or swelling. If not check the wrecking yard for them. They are worth having. The rare occasion you have a/c on and turn the steering wheel to the lock the engine will die.

Josh_Br

Ok. One thing...the truck doesn't have air conditioning. Maybe it used to, not sure. I haven't had it long. I know it had a motor replacement. But there is no AC button inside.

youngtoyotatech

If you can give me the year and emission level I will check the manual and give you a for sure on what they run

toyota4x4907

Okay.
Red- PAIR valve VSV. Its part of emissions
Blue- fuel pressure regulator VSV. You need this hooked up correctly to get correct fuel pressure.
White- A/C Idle up VSV. Increases the idle speed when the A/C is on so the engine does not bog.

bob200587

dickfers.

That's what they are.....

Josh_Br

Thanks toyota4x4907, that is very helpful. Youngtoyotatech, the truck is all 1990, except the engine block and head, which are 1994. I'm not sure about an emissions level. Here's a photo that is actually of my truck:



It's the valve on the white one that is whistling. I took the valve off while the engine was running last night, and it does suck in air. Maybe I'll just take the valve off and put some foam around it with a zip tie to hold it on, unless you guys don't think that would be wise.

While we are at it, I have been wondering what this connector is for.....It's not hooked up to anything. I think when I bought this truck, I got a little of the last guy's unfinished business, but I don't mind. I appreciate your help, and it's fun trying to figure this stuff out. Here's the connector that is not connected:



Thanks,
Josh

toyota4x4907

What part of the white valve is whistling?


That SENSOR in the second picture is the Exhaust Gas Recirculating temperature sensor.
It is part of Cali-spec emissions. I believe all '94-'95 22res had them, though. Is the check engine light on? Or is the CEL code 71 stored in the computer?
Look for the plug in the wiring wrapped in black tape in the middle of your picture. It might be stuffed down in there somewhere. Theres only one plug that will fit, so it should be easy.
If you dont have the CEL or code, then i would just leave it unplugged. It wouldnt be serving any purpose as the ECU wouldnt even be reading it.

Look on the underside of the hood for a sticker; it should tell you what emissions you have- Fed/Can or Cali-spec

Josh_Br

Thanks, I'll check that sticker and for the other end of the harness No, no CEL is on. Not sure if there's a code stored in the computer. I do have an OBD II scanner, if the truck uses OBD II that is.

The thing that is whistling is the black valve on the white connector. It's the black valve that is whistling. If I take it off, the whistling stops. When the valve is removed and the engine is running, I can feel it sucking air in with my finger. So I was thinking, if that valve only serves as a filter for the incoming air, I could just use some foam. But maybe there is more to it than that.

maco35

I remember that mine used to whistle because the vacuum lines were hooked up the wrong way, try switching the vacuum lines in the VSV from left side to right side and vice versa.

scope103

I don't own a 22-RE, so I'm relying on your pictures and the manual http://personal.utulsa.edu/~nathan-b...24vacuumsw.pdf It looks like the "white" valve is the VSV for the AC idle up, just as toyota4x4907 says. The whistling probably means there is a leak in the valve, so it is letting air in (vacuum out?) even though the AC is off.

I'd run the simple diagnostics in the manual to make sure. If the valve is working correctly, you may just need to fab up a piece of foam on the atmosphere side of the valve.

Of course, if you have no AC, then you don't really need to worry about it. You have the actuator, but it may go nowhere (and w/o AC you just want to be sure it isn't messing with the idle.) So just pull the vacuum lines off the VSV and hook then to each other with a straight nipple.

Last, you can put that OBD-II scanner away. You're going to need the very expensive early-90s OBD-1 SST (special-service-tool): http://www.staples.com/Staples-1-Siz...product_525881 The manual gives the procedure. http://personal.utulsa.edu/~nathan-b...26diagnosi.pdf

Josh_Br

Ok, yeah maybe I'll just take the lines off the white one and hook them together, since the truck doesn't have AC. I'll have to mess with it and see if it effects the idle......which is a whole different thread