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I've asked this also on volvoforums, but since here are also general car discussion I would like to ask here also.

I own a Volvo s80 2.4d 2009 (with 300.000 km) and since the weather got colder I noticed weird behavior on cold starts. I've noticed that this happens every time the car is cold and at cca. 1°C and below. When I push the start button, engine starts with no problem whatsoever and turns on at about 750 RPM. What is weird is, that at that time (aprox. 2 seconds) radio and lights (and probably other stuff) is not working and only turns on after that 2 seconds. The engine sound is also weird. Then, after 2 seconds everything comes on and also the engine RPM gets higher to 1200 RPM and the sound "becomes" normal. I've changed the car battery and only codes I get are the bad nr. 2 and nr. 3 glow plugs, but I suppose this shouldn't be the problem.

Any thoughts?

Pᴀᴜʟsᴛᴇʀ2
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spaceman
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1 Answers1

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Many cars switch off the radio and other electricals whenever starting the engine. They are then turned on after the engine has started and the voltage of the charging system is stabilized.

A diesel at cold start can very well sound a bit rough. However, if the noise comes from a sticking starter motor (i.e. it sounds the same as turning the key continuously for 2 seconds after starting the car would sound), you could consider remedying the issue.

I don't see any indication of a severe problem in your question, other than the codes for bad glow plugs. Do replace them!

juhist
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