Hi new to the forum any one know how I can slow down the start up on my cold s2000 engine but still retain tick over when it,s warm
Thanks Chris

 

Never heard anyone complain that their car starts too quickly before, my car starts about a millisecond after I press the button, no problem there.

 

 

I think he means, that the engine runs too fast (rpm) when cold.

I too, wish it wouldn't go over 1500 on cold start, mine will go up to as high as 3,000 on initial start when cold. It'll then settle at 2500, and work its way down to around 800 hot.

I like the V6 in my 6spd Accord, 1100 rpm cold start idle.

 

Anyone stop to think this is what Honda intended for the car to do on a cold start?


I don't know this for certain, but if I'm remembering correctly I believe it is programmed to do this because of the oil viscosity curve. As most of us know, Honda specifies a 10w-30 oil type. Yes, I know the car was designed over 10 year ago and G4 oils have come a long way... but still. 10w-30 means it has a lower shearing viscosity when cold and the viscosity actually builds up to a normal 30-weight oil viscosity warm by cross-linking the long hydrocarbon chains. So this is all what the oil is designed to do.

As for reducing the 'cold start rpms' I would advise against it. You also want a 'turbulent' oil pan to move the oil around at this lower, healthy viscosity while it warms up so everything is getting nice and coated as the engine comes up to operating temperature and cross-links the oil chains.

I'm not an expert, this is just some information I've read over the past couple years. But it may not be correct information, I dunno. Take it with a grain of salt.

 

It may be an emissions feature. The air pump blows air into the exhaust stream to burn hydrocarbons at startup due to choke conditions. A lower RPM would take longer for the cat to reach working temperature, thus creating more pollution.