Hello,

I have an '88 4runner with 186,000. I love the truck and I am slowly making modifications to it as time and money allows. I have noticed that since the winter season started there is a loud whistling noise at cold start ups. It seems to "go away" as it warms up to running temp but unfortunately it also seems to be getting progressively louder and takes a longer time to "go away". I thought that it sounded like some kind of vacuum leak, but I can't seem to find it. Could it be something else, and do you have any ideas of what it might be or how to diagnose it. I would like to have the truck for a while and I don't want to ignore a possible current/future problem.

Thank you very much!!

Zuff

Need a little more info before we start throwing darts at ya. #1 is engine thats in your 4Runner. If its a 22R-E (4 cyl) then I would start looking at the auxiallary air valve that is mounted on the bottom of the intake manifold at the front. This valve and its hoses are what supply the extra airflow to give you the cold start high idle. IF its a V6 that you have...then hold out for more information!
~Darin <img src="/forums/images/graemlins/baby.gif" alt="" />

my belts squeal and whistle when its cold.

Darin,

Thanks for the info! I will check it out as soon as the weather in MA is above 0!

(The engine is a 22RE)

Thanks again,

Zuff