xr8ed

iTrader: (1)

Today I heard a noise I've not heard before.

After I pulled into my garage and shut the engine off and pulled the key out, I got out and heard a very small motor noise. I immediately started looking for the source and it was not from the engine bay. It sounded like it was coming from underneath the middle to rear of the car. As I was ready to bend over and take a peak, the motor stopped turning and ended with a solenoid/valve like "PSSSH" sound.

Does anyone have any idea what this is? I'm sure its not the air pump as thats in the engine bay and it only comes on during start up. I don't see how it would be the fuel pump as the ignition was off and key pulled out.



BTW the sound lasted for close to 1 minute.

PeteInLongBeach

My '09 does that too. Something is cycling after shutdown, but not sure what. It does sound fuel related....

alnielsen

iTrader: (4)

Without more information, I would say it is most likely the radiator fan(s) that continue running after you turn off the ignition. It is normal and they will turn off on their own.

I8U

iTrader: (1)

Is it that time of year again for this type of question...

zoom44

The car always does the evap test after its turned off. coming from the middle rear thats what the sound is.

PeteInLongBeach

Thanks Zoom... that makes perfect sense based on the timing, location, and sound of it.

Gr8Bullet

iTrader: (5)

lol my radiator fan stayed on for like 45 mins once. no joke

ArXate

Yeah, I don't think the OP is referring to the radiator fan, so I'm going to go with what zoom44 says by default.

xr8ed

iTrader: (1)

It is definitely not the radiator fan. This was no where as loud as the fan nor was it from that location.

Zoom44 can you elaborate on the evap test? After posting my OP, I went out and started the car for a few minutes and shut it off, but no sound that time. Honestly I have never heard (probably just never noticed it) this for the 3 years I've owned this car. It is a fairly soft sound so one would probably never notice it unless you parked in a quiet garage.

Is it normal for the test to have run for close to 1 minute in length? What is involved?

jasonrxeight

its the air pump thats pumping the exhaust gas out of the exhaust.

xr8ed

iTrader: (1)

I checked the service manual and found the little bugger.

It is the evap leak detection pump. This car has too many pumps

zoom44

I should have been more exact and said after each drive cycle. yes its normal for the test to be about that long. If it wasnt- you'd have a cel for a failed test

http://technologyinterface.nmsu.edu/5_1/5_1e/5_1e.html

http://www.aa1car.com/library/evap_system.htm

the first PCM flash update way back when that took us to the original H or K i think was a logic fault that caused a false evap test failure CEL if you operated say the window switches or a button on the fob while shutting the car off. basically doing both at the same time caused the test to stop when it had just started.

zoom44

meh who says the search doesnt work well. it works great if you remember what you posted 6 years ago

https://www.rx8club.com/showthread.p...698#post257698