tomh

I just picked up my first toyota truck the other day. It is an 89 with 22re and 5 speed. It has 30k on the rebuilt engine, about 210k on the truck.
When I start it up cold the idle speed starts out at about 1500 rpm, then works up to 2000. it stays high like this for a while then slowly works its way back down to normal idle speed 850 rpm, takes about 5 minutes or so. Goosing the throttle does nothing to to kick it down, if anything it makes it hang at a higher rpm. I sprayed out the throttle body and wiped out around the plate. Any ideas would be great. Thanks!

Elton

i remember my 22re doin that when it was cold i think its normal

thook

Sounds like the throttle cable, lever, or even the TPS may be sticking a bit.

How is the idle behavior, otherwise? Smooth or choppy at all?

tomh

i think the idle sounds ok, not as bad as my old ford ranger! it seems pretty smooth. I also lubed the cable, but it did not help. I don't think 2000 rpm is normal especially when you cant kick it down at all.

rowdy235

Just an FYI I don't think "kicking it down" does anything on fuel injection. On Carb it moves the FI linkage, thus lowering the idle, but unless somethings sticking a 22re shouldn't do that.

tomh

well, like i said it is my first toyota :-)
my F150 is fuel injected and it idles lower when you goose it on warm up, guess I thought this truck should too.

Is 2000 rpm too high for fast idle on a cold engine? It seems like it should warm up faster. would it have anything to do with a thermostat stuck open?

thanks

rdlsz24

Mine does the same thing and I've never really thought twice about it.

Rob

thook

The way the 22re is designed, it takes a little while longer to warm up. Atleast, that's what I've always experienced. My V6 warms up much quicker. It has a lot to do with where the thermostat is located. So, the thermostat does have something to do with when the idle kicks down, but it's really controlled by the auxiliary air valve. I believe the way your year model is designed, it's in the underside of the throttle body. It closes as the coolant reaches temp shutting off the supplementary air to the intake.

http://www.autoshop101.com/forms/h21.pdf

1500-2000rpm is too high of an idle. Does your throttle body have a throttle opener? It would be located on the throttle linkage side of the TB.

Here's the FSM procedure for inspecting the TB. You might go through and check everything over for anything amiss.
http://personal.utulsa.edu/~nathan-b...34throttle.pdf

tomh

thanks for the links to the manuals, that helps make sense. The air valve theory could make sense. But would that high of a cold idle mean the valve is passing too much air?

thook

They don't really work that way....as in allowing "too much" air past the throttle valve. Typically, if the AAV malfunctions, they either stick open or close. Your seems to be working just fine, so I'd look at other potentials.

Now, I was going to suggest some things, but after thinking about it more, I think you're idle is just plain set too high. Your 850rpm is the setting for A/T equipped 4wd's. Since yours is a 5spd, it should be right around 750rpm....like mine. Follow the link I posted for resetting it.

iamsuperbleeder

850 isn't terribly too high imo. Hell, I purposely set mine at about 900 just because it gives me more throttle response from idle, lol.

On first start, mine goes to about 1500 for about 2 er 3 minutes and then comes back down, but it's never gave me any issues or made me think "now why's it do that".

HOWEVER, before I removed and cleaned my intake thoroughly, it did about the same thing, but mine would jump almost to 2500 for a while!

I also need to adjust my TPS, and I feel this may be part of the cause, probably not the main reason though...

May not be normal for the motor, but personally, I can live it

thook

The reason it's "too high" in normal driving situations is that more fuel is used when sitting at idle. So, it's really about economy I say this. Otherwise, one does whatever they want....right?

iamsuperbleeder

Precisely what it boils down to...

At 2 and a half weeks to a tank of gas, there's no complaining here, and that's with go'n off wheel'n and lay'n on the throttle to play with little ricers too! About 260 miles to the tank; hell, I'm happy, lol. I could get so much more out of it if I didn't have a lead foot...

thook

Yeah.....at 15 or so mpg's, I'd say you have a lead foot....lol! Don't feel bad, though. It's probably genetic....in which case, how could anyone blame you?! You're compelled....and, dare I say....obligated to fulfill the genetic lineage!

iamsuperbleeder

THAT'S WHAT I TELL EVERYONE TOO, but no one believes me... especially that cop...

tomh

Yeah I guess it is economy, thats why I got this truck, but also I think I am just too impatient to wait for it to warm up. Guess I just need to change my habits. but i would like it to warm up at about 1500 or less :-)
I am going to see about adjusting the idle down a little. So 850 for 4x4 is high? I thought thats what it said on the sticker under the hood?
I did some more searching last night, and I am leaning towards dirty TPS.
Thanks for all the input.

thook

It may have said that under your hood. I was referring to the FSM, but also the sticker under my hood....which is 750. But, if you adjust it lower and the motor doesn't seem happy with that, you can always put it back. Either way, it won't hurt a thing.

If it bothers you that much waiting for it to warm up, you can try a different thermostat. I suppose it's possible someone before you put one in that's rated higher than Toyota recommendations. If your going to inspect/clean the TPS, it would be a good time to try a new thermo since the thermo housing needs to come off. It will be in your way to get to the bottom screw on the TPS.

tomh

I am going to file this one under if it ain't broke don't fix it! I am sure I will find other problems without trying to find one here. Thanks for all the input guys!

tomh

Well it got a little cold here yesterday so I turned on the heat, and it just blows cold air. I have to check all the cables and stuff, but my first thought is that this could be related to the long warm up deal?

When I first took the truck home it was a little low on coolant so I topped that off. Guess I will try to burp the system too.

I did a lot of searching around on this sight yesterday, and it seems these are common problems, but not much consensus on fixes. I just pray it is not a blown head gasket! the oil and antifreeze look good though....

abecedarian

Yes it could be related to the long warm-up problem. If the thermostat is sticking open, it'll take forever to warm up enough to get warm air out of the heater since the coolant is getting cooled in the radiator faster than it's getting warmed up by the engine.
Swap that thermostat!