wierd noise

[shorook90]

I have this really strange noise that no one can diagnose. When I turn off the car and then quickly turn it back on to the start position(right after turning it off), there is a strange noise. It's sorta like a hissing/grinding noise. One time when I turned it to the on position right after shut down, the engine kicked over and started, and the clutch was not even engaged. I think it almost has to be the starter. This might be a strange question but do you guys think a misaligned starter could cause power loss? maybe from putting undue stress on the flywheel. thanks guys

 

[SHO--ripper]

I don't know how good an idea it is to turn the car on right after it is turned off. The flywheel might be still spinning and you may chip teeth. I may just be sleep thought

 

[shorook90]

I just tried the same thing on my moms mtx cavallier and it did not do the same thing. so I think something is broken shrug

 

[haydenm315]

shorook90:
I have this really strange noise that no one can diagnose. When I turn off the car and then quickly turn it back on to the start position(right after turning it off), there is a strange noise. It's sorta like a hissing/grinding noise.

Could it be the fuel pump priming noise. I had my seats out for a while and cut my rear deck out for custom stereo stuff. I could more clearly hear my pump. Even though it was replaced not too long ago by ford, and the tank was cleaned, the pump is going up again. sometimes it will make a squealing and grinding noise when priming. Maybe we have a similar issue?

 

[sdpatt]

shorook90:
I just tried the same thing on my moms mtx cavallier and it did not do the same thing. so I think something is broken shrug

???????!

 

[sdpatt]

Where is the sound coming from? When you turn the igntiion key to ON at any time, the fuel pump will run for about 1.5 seconds then stop if the engine isn't running. This also flows fuel through the fuel return line to the tank. If the engine is hot and the fuel return line check valve is worn and not holding pressure, this can cause the vaporized fuel in the return line to bubble up through the fuel in the tank. This sounds like a bubbling, rumbling noise from the fuel tank under the rear seat. Is this what you are hearing?

As far as the flywheel still turning, how quickly are you returning to ON after shutting the engine off? The engine takes less than a second to stop turning from idle speed. Unless you are turning the key to START, the starter will not be engaging. To turn the key bcak to ON more quickly after stopping the engine would make em ask the question, "Why?"

It's pretty hard to misalign the starter and if the starter pinion were contacting the flywheel due to installing an incorrect starter, you would hear a grinding noise as long as the engine was turning until the interfering parts worn themselves some clearance. The interference would absorb some power since it takes energy to make noise, but to consume any appreciable amount of power would make a significant racket all the time the engine is running.