Hi

Does any one know why my 2002 S2000 has started to rev very high on cold starting (in excess of 3000 revs)? It's worryingly high for a few seconds such that I am now starting in First and immediately slightly engaging the clutch to lower the revs. Warm start no problem!

Help Please

Regards - Paul

 

its normal leave it alone

 

It can't be normal since it's only recently started doing it - previously it still reved, to what I would call unnecesserily high, but only about 2000 revs.

 

2000 sounds right but 3k? how cold is it outside?

 

I've never seen mine go to 3000. It was 32* outside yesterday and it started up at 2000.

 

I wouldnt worry too much. I know that's a little higher than usual, but as long as it's dropping back down then I think it's fine

 

That's exactly what mine does. I am not worried about this. If you can't get over it, take it for a drive and get it up to temp, then go park it in a heated garage and leave it for a few hours. It should've cooled back down pretty well by then so if you go out and start it you'll probably notice normal idle.

 

40 degrees or so - nothing exceptional.

I'm most worried about these sort of revs before the oil pressure is established and oli properly circulated i.e. wear. None of my other fuel injected engines have ever reved above say 1250 rpm on start - that's meant to be one of the advantages of processor control - you can control these things.

 

Are you saying that this is a method of resetting something to avoid the problem?

 

Oh no no, perhaps I should've clarified. I was suggesting not to worry, but if you are anyway then you can perhaps ease your mind by creating more moderate temperature conditions to prove to yourself that nothing is actually wrong with it.

The computer is pretty well tuned, but if you also want to quickly have your car adapt to the new temps at this time of year then you can reset the computer. If you figure the ECU learns based on an average of temp/humidity conditions and your driving style, then you can immediately have it adjust to the new temp.

I don't believe that will reduce your idle though. Just use an appropriate winter oil, and don't start the engine if you don't plan to get the car up to temperature and drive it more than a short distance. That's good policy for many reasons.