IAC

scupking

Active Member

Sep 18, 2005

1,186

1

36

Enfield, CT

Jan 15, 2008

#1

• Jan 15, 2008

• #1

I did the IAC restrictor plate Saturday. I used the smaller of the 2 holes on the plate. Now I hear what sounds like a hissing sound coming from the IAC. I'm thinking its just trying to push air thru a small hole and that’s what’s causing the noise. I checked all my hoses and nothing is lose. Car runs fine and I noticed a small difference with the RPMs coming down faster with the plate on. So is the hissing noise normal with the plate installed?

 

d98gt

Founding Member

Mar 14, 2002

4,505

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204

SE Texas

Jan 15, 2008

#2

• Jan 15, 2008

• #2

I don't recall hearing any difference in it, though I have been running one since they first became popular quite some time ago.

I had a small leak where the IAC bolts into the plenum. While the car is running, run your fingers all around that area and see if does anything with the noise. I ended up using some RTV.

 

scupking

Active Member

Sep 18, 2005

1,186

1

36

Enfield, CT

Jan 15, 2008

#3

• Jan 15, 2008

• #3

d98gt said:

I don't recall hearing any difference in it, though I have been running one since they first became popular quite some time ago.

I had a small leak where the IAC bolts into the plenum. While the car is running, run your fingers all around that area and see if does anything with the noise. I ended up using some RTV.

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I didn't use the old gasket. I just used the restrictor plate (that’s what the directions said to do), may be that’s the issue.

 

S

SilverBullet00

New Member

Jul 5, 2004

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Wichita, KS

Jan 15, 2008

#4

• Jan 15, 2008

• #4

my old car made a loud hissing sound when the hole on the restrictor plate was too small. Check for leaks like state above, but if the holes ARE too small, you will get a check engine light...

 

scupking

Active Member

Sep 18, 2005

1,186

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36

Enfield, CT

Jan 15, 2008

#5

• Jan 15, 2008

• #5

SilverBullet00 said:

my old car made a loud hissing sound when the hole on the restrictor plate was too small. Check for leaks like state above, but if the holes ARE too small, you will get a check engine light...

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Nop not getting the check engine light but its hissing. I will try the bigger hole and see what happens.

 

forum155pl

New Member

Jul 11, 2006

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the 509

Jan 15, 2008

#6

• Jan 15, 2008

• #6

lol i just drilled a hole in a penny and put it in the hose right before the IAC and its been working for the last year.. only cost me $.01 and about a min lol

 

4.6andSlicks

New Member

Aug 22, 2006

171

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0

Central Connecticut

Jan 15, 2008

#7

• Jan 15, 2008

• #7

I bought the one made out of gasket material off of ebay. The first time I put it on, I didn't have an inch/lb torque wrench available and I did hear a hiss (more of a whistle). I removed it and put some silicone sealant on my finger and kinda rubbed it in to the surface leaving absolutely no extra. Put it back on and torqued it to spec and it got much better. I think it's just pushin' air through a small hole and you're going to get some noise.

 

eliteJAE

Member

May 29, 2007

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1

16

Stanford University

Jan 15, 2008

#8

• Jan 15, 2008

• #8

forum155pl said:

lol i just drilled a hole in a penny and put it in the hose right before the IAC and its been working for the last year.. only cost me $.01 and about a min lol

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LOL gangsta, puttin dem lincolns to use

try using some RTV before you experiment with making the hole bigger

 

the98stang

Active Member

Aug 12, 2005

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Clovis, CA

Jan 16, 2008

#9

• Jan 16, 2008

• #9

scupking said:

I did the IAC restrictor plate Saturday. I used the smaller of the 2 holes on the plate. Now I hear what sounds like a hissing sound coming from the IAC. I'm thinking its just trying to push air thru a small hole and that’s what’s causing the noise. I checked all my hoses and nothing is lose. Car runs fine and I noticed a small difference with the RPMs coming down faster with the plate on. So is the hissing noise normal with the plate installed?

Click to expand...

Take that plate out, it's not helping anything.

 

scupking

Active Member

Sep 18, 2005

1,186

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36

Enfield, CT

Jan 16, 2008

#10

• Jan 16, 2008

• #10

the98stang said:

Take that plate out, it's not helping anything.

Click to expand...

Yeah I didn't notice much of a difference with it. People say they notice more effects with the EGR restrictor plate so I guess I will try that this weekend.