have had an issue the my expy idling high for a while, when it started i posted on here and had a few responses saying replace idle air control valve i havent been to concerned bc the mil whet off and hasnt come back on, today i change the breaks and since i was working on the truck figured id go ahead and replace IAC valve. Breaks went smooth but not so much with the valve.
heres my issues:
first thing i did before starting her back up i cleared dtc's so that it would start up fresh with the new valve.
when i first started it up it revved really high (higher than normal) then came down to normal warm up idle, so i didnt think much of it being that it was a new valve, after running for a minute or so i noticed a high pitched whistle coming from the engine compartment, so i started checking all hose connections electrical plugs etc.. found nothing out of place so i continued to let it warm up once warm was still idling high between 900 and 1000 rpm, so i put it in gear with foot on the break and idle came down to about 750-800 and the whistle is now a little louder (its not really loud but you can hear it faintly with the hood down) i had my wife come out and put it in and out of gear so i could try to find where it was coming from but no such luck, so i had her lightly rev the engine and i hear a howling sound coming from around mass air sensor but only when really lightly revving, took it for a quick drive and same sound.
any help would be great im at a loss and its my only vehicle so i want and need to keep her healthy.
heres my issues:
first thing i did before starting her back up i cleared dtc's so that it would start up fresh with the new valve.
when i first started it up it revved really high (higher than normal) then came down to normal warm up idle, so i didnt think much of it being that it was a new valve, after running for a minute or so i noticed a high pitched whistle coming from the engine compartment, so i started checking all hose connections electrical plugs etc.. found nothing out of place so i continued to let it warm up once warm was still idling high between 900 and 1000 rpm, so i put it in gear with foot on the break and idle came down to about 750-800 and the whistle is now a little louder (its not really loud but you can hear it faintly with the hood down) i had my wife come out and put it in and out of gear so i could try to find where it was coming from but no such luck, so i had her lightly rev the engine and i hear a howling sound coming from around mass air sensor but only when really lightly revving, took it for a quick drive and same sound.
any help would be great im at a loss and its my only vehicle so i want and need to keep her healthy.
