raywang5

well, it just happened today, i turn the key( not start the engine), i step on the gas, some ring noise come from the engine bay, then i pop the hood, let my GF step on the gas, the noise still there, everytime we try to do that, it has a ring noise comes around throttle body sensor. i try to reload my tune, its still there, maybe i should try to clean the throttle body? or it is broken something? so weried. I feel like i need to rebuild the car soon, lol(manual transmission with paxton novi2200 in my car)

siggyfreud

You sure it wasn't doing it before. Could be the Idle air control valve adjusting. In some vehicles, hitting the gas with the ignition on, but engine off, is a way to tell the computer to start up differently (no coldstart fuel, or extra cold start fuel depending on the car).

When I was doing tuning for TPI cars (85+ Corvettes/Fbody's) it would tell the cold start injector not to fire, and would change the IAC settings a bit.

Nuke

I don't quite understand. Why are you turning the key, not starting the engine and then hitting the accelerator? Does it make that noise when you start the engine and rev it? Is it a ring like a phone? Cowbell? Fire alarm?

I'm so confused and it's too early...

raywang5

ok, i step in the car, turn the key without start the car, i step on the gas, a noise come from the engine bay around the throttle body, and i m sure its the one attach to the TB sensor. (see the attach where i cirle). maybe i should change a BBK throttle body? but idk if i need retuned it since i have supercharged on it..BTW, thank you Nuke

raywang5

will TB swap solve this problem? or is it a big problem? or leave there is ok also?

siggyfreud

Does it run okay? If it runs okay leave it be.

Nuke

I still don't understand WHY you're engaging the throttle with the engine off...

As stated above, if the car is running fine and you're not throwing codes, leave it be.

raywang5

Runs ok, except the TB feel a little bit lag when accelerate. I may clean the TB to solve the lag,