Reving high at cold start

Nov 15, 2003 8 Replies

Hello again,



Just curious, why would my 95 LS 2.2L auto rev high at intial startup when cold? Only started happening now that its cold outside. Does it when I leave for work in the am and leave for home in the pm, both times are cold. I dont touch the gas, just turn the key to acc for a couple seconds then start, engine will rev up to 3k rpm until I hit the gas, then after a couple seconds it goes to a "normal" cold-start rpm of 1500. I'm just concerned about having the rpms that high when it first starts with cold oil, etc.


This is the electonic fuel injections equivalent of a choke. The mixture and idle speed are richened to smoothe the engine until it reaches operating temps.

normal. it needs slightly richer mixture when cold.

Not THAT high. Try checking the TPS sensor, or the coolant sensor. Get a check engine light with it yet?

Hi, John How long have you been driving? Read owner's manual? Tony

Hi Tony,

Quite a while

No, Haynes manual. But before I replied I checked the owner's manual and guess what?..........no mention of it. You should know better....

Next?

I confirm IT IS too high. Idle on my Legacy nerever goes higher than 1500 rpm at startup even on the coldest mornings. And they are often really cold here in Montreal.

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