I'd check your Fast Idle valve.

"JanN" <JanN.DelDit@helemaal.niets.com> wrote in message
news:bvl8a4$pvr$1@news.surfnet.nl...
> The problem is that after the engine (1991 Accord 2.2) is fully warm, the
> idle jumps up and down. It seems to almost stall, the idle air control
> reacts, and the idle shoots up, too high. It again falls down to almost
> stalling. This continues to repeat.
> So I took the Idle Air Control (IAC) from the intake manifold. The metal
> screen was for the larger part blocked with black soot. Cleaned this.
> This did not complete solve the problem. I think also the electrical motor
> is sticky. Can anyone on the list give me some hints on how to get this
> smooth?
> How can I remove this motor from the IAC assembly??
> Should I spray WD40 at the IAC valve, or will this ruin things?
>
> Thanks, Jan
> 1991 Accord Aerodeck (=wagon) 2.2i EX
>
>