Toyota Trucks: 88 4Runner High and ERRATIC IDLE

FriendlyFire19 wrote: 

The second problem is a symptom of the idle being too high, so fix the idle speed and the brake cutout problem will fix itself. Sounds like some of the cold start compoents are bad, check the temp sensors and cold start air valves and injectors to see
what is wrong.

--
Roger

Sounds to me like you might have a vacuum leak ,take a vacuum gauge and
check your inches of mercury
needle should be steady between 18 -24 inches at idle .
"FriendlyFire19" <com> wrote in message
news:talkaboutautos.com... 
it decided to start idling at 1500 rpm. If I let it idle for about 20 mins
it will come down but as soon as I drive, it goes right back up. 
And for some reason when I engage the 4wd the idle hunting stops. 
would be greatly appreciated. 

Hi Roger

I took your advice and cheked some of the cold start components and everything checks out. Although I do not know how to check the cold start vavles. How do I do this???

Idle Adjustment

My truck idle was perfect for the past year and I never had to touch it. Then it sky rocketed to 1500 from 800. can lowering the idle possibly pose a problem. Because the truck does on very rare occasions idle the way it should, but only when it is idled for a long time and not driven.

I appereciate the input very much.

Thanks

Cory

Hi

I took your advice and checked the vacuum pressure and it fell right within range.

Any other ideas???

Thanks alot for your input

Cory