Hey guys, got another mystery to solve. I recently had my whole clutch assembly replaced due to the TOB went bad. I have noticed a bell ringing sound coming from the driver side part of the motor. It only happens when the rpms get close to or at 500 rpm. The sound is metalic and is fairly loud. Clutch is a OEM replacement exedy. Car is stock for the most part. Timing belt has been replaced already around 15,000 miles ago. Let me know if more info is needed. Thanks in advance.

 

These types of problems are very hard to pinpoint because we are not next to the car to hear what you hear... Maybe take a video if possible?

 

500 rpm ?

 

I will try to borrow my brothers gopro and video in the morning. The reason it goes to 500 rpm is a issue I have as well. It likes to want to go that low when I engage the clutch and don't give any gas. That was happening before this came about. Hopefully I can get that figured out soon also.

 

?????

 

Sorry, I get ahead of myself when I type. The situation with the rpms is as follows. In the mornings when it is still a cool motor, I have the low rpm drop problem. When I am driving and push in the clutch, the rpms will drop to 500 at or around and it seems the car wants to die. This problem seems to go away after I drive for a few miles, or turn it off and start it up again. I do decent maintenance on all my cars, so I think a sensor might be the issue. No SES light is on when this happens.

 

clutch chatter?

 

I will try to get a video up hopefully tomorrow, if not then try for Friday.

 

Well I am unable to get a video of this problem. Brothers gopro is missing for some reason(kids possibly). I am guessing if I can figure out my idle issue, this will be done also. Starting to think it could be a heat shield somewhere vibrating at those low rpms. The clutch works perfect, so I am not figuring they messed up with the install.

 

heat shield clamp under fuel tank?

 

I decided to have a local shop run some tests. I am at a loss at this point. They said the idle air control valve is faulty. From my readings, I thought this model did not have this sensor. They state the sensor is on the cast behind the throttle body. They said it is built in and I would have to replace the casting with the sensor included.

 

yeah we definitely don't have IAC, it's drive by wire, the ECU controls idle air flow by throttle position...

 

Crans do you think it could be the solinoid on the throttle body or maybe the accelerator position sensor? I had plans of switching out the throttle body so this would give me more reason to now.

 

I need to hear the noise...bell ringing could be a few things...I don't want to to say yay or nay, because throttle bodies are expensive, you don't want to throw money at a noise because it "could be" this, or that...why are you switching the throttle body?

 

The bell ringing sound was a heat sheid that was loose. It would rattle at the low rpm. A throttle body is from 50-100 dollars for a 63mm one.