4x4taco

I was driving my truck last night when it was about 40 degrees and I heard a fairly loud whistle coming from my truck. The noise was much more apparent before the truck had fully warmed up and during acceleration. I was wondering if anyone else has experienced this whistle because I don't think I have heard it before. I'm guessing it was coming from the deckplate, but it hasn't made the noise in the year since I installed it. so I wasn't sure....any ideas?

2001Millrunner

mine never has that problem, I'm thinking it's the engine noise is prolly amplified through deckplace. Maybe santa gave you a turbo for early chirstmas present?

midiwall

Your sig doesn't show it, but did you do the ISR mod as well? The ISR tends to whistle at times. A 4" deckplate shouldn't whistle, but it "could" given the right conditions.

Any chance that you've been under the hood and forgot to replace a vacuum hose?

kevin444

I get the whistle. It just the induction of air getting sucked in nothing to worry about. I like it.

rimpainter.com

I get the whistle only at a certain throttle input and RPM. I try to time it right as I go by a ricer with his windows down.

4x4taco

yeah, screw blow-off valves, i got a whistling intake! Unless they came off on their own, I haven't taken any hoses off. I was driving around today and didn't notice it much. Didn't think it was a problem, just checkin

BajaRunner

I get a slight whistle sound when I gun it, going onto the freeway or something... I only got it after doing the ISR mod though.

kevin444

I also get the humming sound. Try putting your car in park with it on. And stick your ear by the passenger side headlight you should hear that humming sound

MTL_4runner

Be thankful yours whistles because whistle tips are illegal now.
You could enlarge the deckplate size and see if that helps (ie go to a 5 in instead)

rimpainter.com

How about a 6" deckplate?

kevin444

grrr..