Cold Start Noise

[Blueflash]

Electrical motor? Bit like a hair dryer or fan? Secondary air pump. I *think* 'they all do that, sir' Mine certainly does

Injectors sound like a light clicking noise as opposed to a valve much heavier tapping of banging. If you imagine 8 small solenoids going off, once per cylinder ignition you'll get the idea

C

Phew… my car is 4.7 from 2014, and reckon I’m hearing the injectors for about 60secs on cold starts.

 

[Zep]

You can hear them all of the time, but perhaps you are just getting used to it.

 

[conaero]

It could be a failing solenoid actuator valve or a broken chain guide. I would need to hear it.

 

[Blueflash]

You can hear them all of the time, but perhaps you are just getting used to it.

Yeah, had 911s for past 18 years and a TVR before that. Last car I heard injectors on was a Mitsubishi GTO… but that was front engined, so could only hear them with the bonnet open. Had forgotten what they sounded like. But yeah, it’s a perfect clickety 8-beat, at idle, when cold.

 

[Zep]

Yeah, had 911s for past 18 years and a TVR before that. Last car I heard injectors on was a Mitsubishi GTO… but that was front engined, so could only hear them with the bonnet open. Had forgotten what they sounded like. But yeah, it’s a perfect clickety 8-beat, at idle, when cold.

My point is that the injectors make that noise all of the time, not just when the engine is cold.