[darcane]

A wierd problem just cropped up on my Civic yesterday. About 2/3 of the time, it will idle at 1400rpms, the rest of the time it bumps back down to it's normal 600rpms.

I recently got a "Pending trouble code" on my Ultragauge (awesome feature, BTW) of P1456 which translates to an Evap system leak, tank side. This is typically a gas cap issue, so I removed the gas cap and put it back on and haven't seen the code since.

Since this started, I haven't been able to get it to enter Lean Burn.

Also, I recently removed my power steering belt, though I don't see how that would be relevant.

Any thoughts on tracking it down?

My first thought is a vacuum leak, but being intermittent puzzles me. Evap system could cause it to be intermittent, but why am I not seeing the code come back?