In article <bvl8a4$pvr$1@news.surfnet.nl>,
"JanN" <JanN.DelDit@helemaal.niets.com> wrote:

> 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
>
>

Don't use WD-40. It causes rubber to swell.

Use carb cleaner or throttle body cleaner on the valve while the car is
running. You want the solvent sucked out as quickly as possible so it
doesn't damage the valve or deposit soot farther down into it.

Also check: thermostat, EGR valve, and PCV valve