Fumes at startup and more

[cvhs18472]

For the last couple of months when my car sat idle for a couple of days it would smell of exhaust when I started the 98 Boxster with Tip. After less than 60 sec. it would clear up and all would be well. This morning when I started it up the fumes were worse than ever and the engine would not idle right. After about 1 - 1/2min. it cleared up and ran well. Any ideas? The only thing that I can think of is that an injector is starting to leak. There has not been a CEL to this point. Thanks for your consideration and help. ED

[wvicary]

Any excessive smoke from the exhaust? Possibly the oil separator starting to fail. It can cause the smoke on start up and poor idle due to the vacuum leak caused when the separator fails.

[CosmosC4S]

I am leaning towards a bad A/OS too, been having huge puffs of white smoke at startup.

At first it was only at cold startups, the other day, I had smoke at warm startup!?

But the smoke stops pretty fast, in a few seconds.

[cvhs18472]

I am leaning towards a bad A/OS too, been having huge puffs of white smoke at startup.

At first it was only at cold startups, the other day, I had smoke at warm startup!?

But the smoke stops pretty fast, in a few seconds.

At this time there is no smoke on start up and the exhaust fumes only occur after the car sits for a couple of days. When I was driving it every day I did not notice it as much