Odd whistiling on cold start at low rpms

Hsien-Ko MR2 · 05-13-2009, 07:36 PM

So, like the title says, on cold starts the car kind of whistles (almost sounds like a turbo wind up but louder). The sound increases and becomes higher pitched until about 3500rpm then stops. Any ideas? If the car is started warm it doesnt do it.

albertgunit101 · 05-13-2009, 07:57 PM

where is it exactly coming from? this might sound too obvious but do you have aftermarket intake? because mine does that but i have ebay intakes though. on cold start the idle is high so it will suck more air and when its warm the idle is where it should be and maybe thats why you dont hear it when its warm already.

plus i dont think its as bad as mine. i have a weird noise something like its hitting the valve covers or something below 1800 rpm and after that it will run smooth.

Hsien-Ko MR2 · 05-13-2009, 08:05 PM

No, but it does seem like its coming from the intake area. Maybe its a clogged filter or something.

tagtmeyerMR2 · 05-13-2009, 08:06 PM

my 92 na did that i never did anything or worried about it

Hsien-Ko MR2 · 05-13-2009, 08:15 PM

Nothing ever came of it?

328FTW · 05-13-2009, 09:37 PM

My 84 with the 3sge does this. I found it is the IAC drawing from the aftermarket intake making a sucking/whistling sound. I have no back window so I can hear it really well until I punch the gas

Hsien-Ko MR2 · 05-13-2009, 10:03 PM

I could see how that may be annoying at a stand still.

328FTW · 05-13-2009, 10:12 PM

The exhaust is pushing 100dB now so it kinda drowns it out

05-13-2009, 07:36 PM	#1 (permalink)
Hsien-Ko MR2 So far... she runs Join Date: May 2009 Location: Tampa Bay, FL Posts: 114 Thanks: 1 Thanked 0 Times in 0 Posts iTrader Rating: (4/100% )	Odd whistiling on cold start at low rpms So, like the title says, on cold starts the car kind of whistles (almost sounds like a turbo wind up but louder). The sound increases and becomes higher pitched until about 3500rpm then stops. Any ideas? If the car is started warm it doesnt do it.

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05-13-2009, 07:57 PM	#2 (permalink)
albertgunit101 Cage Fighter Join Date: May 2007 Location: springfield illinois Posts: 1,014 Thanks: 89 Thanked 21 Times in 21 Posts iTrader Rating: (14/100% )	where is it exactly coming from? this might sound too obvious but do you have aftermarket intake? because mine does that but i have ebay intakes though. on cold start the idle is high so it will suck more air and when its warm the idle is where it should be and maybe thats why you dont hear it when its warm already. plus i dont think its as bad as mine. i have a weird noise something like its hitting the valve covers or something below 1800 rpm and after that it will run smooth.

05-13-2009, 08:05 PM	#3 (permalink)
Hsien-Ko MR2 So far... she runs Join Date: May 2009 Location: Tampa Bay, FL Posts: 114 Thanks: 1 Thanked 0 Times in 0 Posts iTrader Rating: (4/100% )	No, but it does seem like its coming from the intake area. Maybe its a clogged filter or something.

05-13-2009, 08:06 PM	#4 (permalink)
tagtmeyerMR2 No Skills Join Date: Apr 2009 Location: Ft. wayne, IN Posts: 28 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	my 92 na did that i never did anything or worried about it

05-13-2009, 08:15 PM	#5 (permalink)
Hsien-Ko MR2 So far... she runs Join Date: May 2009 Location: Tampa Bay, FL Posts: 114 Thanks: 1 Thanked 0 Times in 0 Posts iTrader Rating: (4/100% )	Nothing ever came of it?

05-13-2009, 09:37 PM	#6 (permalink)
328FTW 3vzfe tinkering Join Date: Aug 2008 Location: New Zealand Posts: 1,531 Thanks: 12 Thanked 99 Times in 83 Posts My Google Map iTrader Rating: (0/0% )	My 84 with the 3sge does this. I found it is the IAC drawing from the aftermarket intake making a sucking/whistling sound. I have no back window so I can hear it really well until I punch the gas

05-13-2009, 10:03 PM	#7 (permalink)
Hsien-Ko MR2 So far... she runs Join Date: May 2009 Location: Tampa Bay, FL Posts: 114 Thanks: 1 Thanked 0 Times in 0 Posts iTrader Rating: (4/100% )	I could see how that may be annoying at a stand still.

05-13-2009, 10:12 PM	#8 (permalink)
328FTW 3vzfe tinkering Join Date: Aug 2008 Location: New Zealand Posts: 1,531 Thanks: 12 Thanked 99 Times in 83 Posts My Google Map iTrader Rating: (0/0% )	The exhaust is pushing 100dB now so it kinda drowns it out