Starting Question...

[Dragon_Reborn]

I think it's proabbly normal but every time i start my engine when it's cold or if It sits for a couple of hours and completely cooled the rpm gauge will jump up to about 2000rpm's for a couple of seconds and then slowy goesdown. it also makes a humming noise. when the engine is already warm and i start it doesn't jump to 2000rpm's instead it normally starts and idles's below 1000rpm's. Any one else have this same exact issue, just wondering.

 

[20ESGUY]

It's normal for it to do that on cold starts. Even though we have fuel injection now it's still necessary for the engine to adjust the fuel/air mix to compensate for the engines temp. The IAS motor on fuel injected vehicles acts just like an old fashioned electric choke on a carburator.