first of all, I would like to thank all of you who post on my last thread to help me, I feel it's better to record a video for everyone who might help.
The weird sound starts from 0:30 and last about 2or3 seconds.
Anybody can help me to diagnose？
A big thanks again.

 

Not to get off topic but did you ever end up going to that shop in freeport?

 

I have been busy these days, maybe after summer I guess...
It sounds like valve adjusting for me, does your baby have that sound? Just circle key once not fire it up and listen to the air intake part...

 

Havent had the chance to even look at my car its in a garage on a trickel charge but i should check it out this weekend and ill let you know. I cant hear your sound clip because im on my iphone try to email the sound. Carrera997re@gmail

 

Read lots of posts by owners who hear scary noises with the engine running but this is I think the first one by an owner hearing scary noises when the engine is not running.

I did not hear anything scary and I listened twice as the first time I was distracted by waiting for the engine to start.

While I have turned the key on but not started the engine for a while I have always remained in the cabin so I can't say based on experience what if any noises come from the engine compartment. I can say that from inside the cabin I've never heard anything disturbing.

When the key is turned on various subsystems "come alive" particularly the throttle at which time the butterfly valve is positioned for what should be the proper opening for the anticipated/expected engine start.

If the engine is started fine. If the engine is not started after a time -- and 30 seconds seems as good a time as any -- the DME will power down this system (and possibly others) to reduce the power drain on the battery, which can be substantial.

However, I have to point out I'm not at the car so my advise is if the noise bothers you and apparently it does that is sufficient reason to take the car to a professional and have him give a listen and offer his opinion.

 

Thanks for all the information!

 

My cars make all sort of sound prior to firing up. It could be the fuel pump.

 

yep, it is all normal... Thank you!

 

doesnt turning on the accessory (or whatever "pre-start" position is) and leaving there for 30+ seconds, "reset" the ECU? my indy told me that after i cleaned the MAF and the TB in order to reset the ECU/TB start position, etc.