TPS sounds like coffee brewing when ignition is turned to ACC

[SnowBird]

I recently removed my emissons and Cruise Control, so Im thinking the non-cruise throttle cable is the culprit?

I dont have a timing belt so I cant start my car to see how it runs, but when the key is turned to ACC a quiet rumbling comes from the TPS, is sounds like coffee brewing is the best I can describe it. Does anyone know what the hell this is?

 

[cjridert1]

Mine does the same thing - this noise stops after like 1 second or so?

 

[TermTrky]

Are you sure it's from the TPS? Your fuel system is primed when you turn the key to the 'ACC' position, for easy starts. It makes a lighter, kind of coffee brewing trickling sound. However you may explain it :]

 

[TerribleTSi]

Yes there is a fuel prime noise right when you turn the key on. but what i think you are hearing is your Idle speed control sensor. it is on the throttle body as well but it is underneath it. it's no big deal it is just old. not to mention your car probably hasn't run in awhile. next time it makes the noise unplug it and it stops. plug it back in and it starts again. once you start the car it goes away though

 

[SnowBird]

Yes there is a fuel prime noise right when you turn the key on. but what i think you are hearing is your Idle speed control sensor. it is on the throttle body as well but it is underneath it. it's no big deal it is just old. not to mention your car probably hasn't run in awhile. next time it makes the noise unplug it and it stops. plug it back in and it starts again. once you start the car it goes away though

Hey man, Thank you. I was just about to delete my thread because I went out into my garage and looked again and it is the ISC. Im rusty on my DSM lingo because I just started working on this car again.

Im assuming this is normal then? Is a "good one" silent? Because mine sounds like shit,like its rattling or something, maybe I should take it out and clean it, I shouldnt be able to screw that up.

 

[steve]

When you turn on the ECU it initializes the ISC. That's what the sound is as you found out.
Maybe I can get my kids to film a video clip of a working ISC vs a non-working one.

 

[matt98eclipse]

My ISC does the same thing! clicks away, when i unplug it it stops.

 

[JusMX141]

The last car that I had in my shop that did that with the ignition turned to "on" needed an ECU rebuild.

Hope that's not the case of you folks.

 

[matt98eclipse]

Yea i really hope not cus i have tried 2 different once and both of them did it the same!