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View Full Version : Whine noise + Vacuum problem?

dejacky
11-11-2005, 07:12 AM
I put the 2nd ground wire underneath a nut from the ecu metal floorboard nut and wallah she starts and idles a little. So, she's breathed her first breath! :woohoo: However, there is this insane high pitched consistent whine coming somewhere from the car and I cannot trace it. As the rpms increase, the "sqeak" gets louder and the map-ecu shows the vacuum becoming more negative. Can someone please help me ascertain what is causing it?

Video Evidence (I did not press the throttle during the video, the idle difference happens automatically and it seems like the increase in rpms is caused by more negative vacuum):

http://media.putfile.com/NA-T-Squeal-Noise

http://media.putfile.com/MOV0262872
leoPTE61
11-11-2005, 09:53 AM
Did you install a thicker headgasket? I had a similar problem and it was caused by the timing belt idler pulley.
vipsoarer
11-11-2005, 09:57 AM
thats a tough one man i think the only times i've heard similar sounds is when either the serpentine belt is either too tight or too loose OR if the power steering was really low, but it still doesnt account for low vacuum. how many inches of mercury are you reading at idle. im sure it fluctuates so i should say whats the range it goes between.
dejacky
11-11-2005, 05:28 PM
Stock Headgasket.
dejacky
11-12-2005, 01:37 PM
rich idle...probably flooded the engine:

http://media.putfile.com/Rich-Idle
Bean
11-12-2005, 03:04 PM
I'd bet money thats a BOV leaking.
dejacky
11-12-2005, 06:15 PM
I'd bet money thats a BOV leaking. You know, I also had suspicions of the BOV leaking too..all my intake mani bolts are really tight.. So, whats the fix?

A very rich map got it to idle the best so far:

http://media.putfile.com/Rich-Idle
michaelvanle
11-12-2005, 06:21 PM
Talking to you on aim. Check to see if you have a red rubber oring between the bov and the flange.
dejacky
11-12-2005, 06:29 PM
Talking to you on aim. Check to see if you have a red rubber oring between the bov and the flange. How can I check this? Do I need a special tool to remove the HKS SSQV BOV from the pipe?
Bean
11-14-2005, 02:20 PM
Unsure. Might want to search for the HKS manual for it online.
Bean
11-14-2005, 02:22 PM
You know, I also had suspicions of the BOV leaking too..all my intake mani bolts are really tight.. So, whats the fix?

A very rich map got it to idle the best so far:

http://media.putfile.com/Rich-Idle

If a super rich map got it to idle the best, then it means that the car was running to lean to run correctly right? That means it has a leak in the intake somewhere. Its sucking up extra air through a leak and its causing the mixture to go sour.

You need to find out where in the engine bay its coming from. A good way to test the BOV is to spray WD40 on the BOV while its running. If the car's idle changes then it means there's a leak there.