PDA

View Full Version : Strange 4.6 noises...

BADDLS1SS
11-11-2004, 10:33 AM
Anyone ever heard of this noise?? This is on a 01' GT auto. Namely when the car is cold, you start it up and it makes this weird low pitch humm almost right away, get worse as you put it in gear and load the engine.

I was able to get out and listen to the noise in the engine compt and it sounded like a deer call or duck call noise coming from around the air filter intake area. As soon as i reach back and flipped the gas it went away. Got back in the car, went to drive, made the noise again. It would only do it once and a while before now its pretty consistent. Every once and a while the owner says it will happen out of nowhere even while driving and on the gas, so it cant be anything in the intake tract then if it happens on the gas...

Also just put a new belt on it (made noise before belt), all the ilders seem nice and quiet yet too.. cars got 53K on it.

Any ideas or anyone heard this before?

Thanks!
Fatstang
11-11-2004, 11:14 AM
Maybe a exhaust leak or vacumm leak :shrug:
BADDLS1SS
11-11-2004, 11:23 AM
These motors dont utilize and air pump do they? The F bodies use and electric one that has been known to make similar noises..
Fatstang
11-11-2004, 12:11 PM
What kind of aftermarket parts does this car have, if any?
BADDLS1SS
11-11-2004, 12:14 PM
just a drop in holley powershot filter, all stock otherwise.
Shane97Cobra
11-11-2004, 01:58 PM
I know my 4V had an elec air pump that it used on cold starts, never had any out of the ordinary sounds though. I'm sure the GT's use a simular set up. If it is in the same place it is in the pass side, front, 1/4 panel.
snoracerx
11-11-2004, 02:18 PM
i have a grand marquis that makes the sound you are describing

and my SHO made that sound

i dont know about my cobra i dont drive it when it is cold

i beleive it has somthing to do with the aftermarket air filter

both cars above had k&n's the grand marquis didnt do it until i pu the k&n in it

just an intake noise i dont know what the cure is and it is also very intermittant
Ghost
11-11-2004, 03:41 PM
It sounds like its the IAC. as mine did that when I bought it. since it did it before I signed the papers I had them fix it.

its not hard to fix just 2 bolts to take it off
Ghost
11-11-2004, 03:43 PM
These motors dont utilize and air pump do they? The F bodies use and electric one that has been known to make similar noises..

No the 2v motors do not have a air pump