Good day all. I have a problem that seems intermittent. after travelling for a few kilometres, say when the car is really warmed up and i stop at atraffic light, the car begins to idle very roughly. it almost feels as though it wants to cut off and then revives itself. the revs do drop and suddenly rise. its not too bad yet. while driving though it's as smooth as ever. any suggestions will be appreciated. thanks in advance

Tried cleaning to MAF sensor?

It doesn't have one. IS200 engine uses a MAP which doesn't need cleaning.

I would try cleaning the throttle body and check/adjust the TPS (throttle position sensor)

IS200's dont have a MAF as far as i know, they have a MAP.

Try with this symptoms table

http://www.bahamutcars.com/workshop/IS_98-...e/m_di_0025.pdf

This the index

http://www.bahamutcars.com/workshop/IS_98-...ents/index.html

Hope this helps.

thanks for the help guys. i was beginning to think of a faulty coil or something of that sort. i'll check the symptom index . and addusting the pos sensor.