Hi everybody
My car is a 1992 300TE with 140kmiles. Since yesterday, all of a sudden, it showed the following behavior: Car runs fine at higher speed. When I slow down to a stop, the idle drops below 500RPM, the engine cuts off sometimes because of that. When I drive slowly in the parking garage my foot off the gas the idle jumps from 1200 back to 2-300, the engine cuts off occasionally and may not be restarted immediately. This seems to occur only with a hot engine. Starting the car is no problem (unless, as noted above, immediately after a cut off), hot or cold.
From reading earlier posts, the OVP, idling valve, the O2 sensor or air flow meter are the main suspects.
O2 sensor and OVP have been replaced four months ago,distributor cap, rotor, wires are fairly new too; so I suspect the idling valve? What would be the best systematic way to approach the problem?
Thanks, Bruno