Volvo RWD 200 Forum

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Constant Idle Speed (CIS) Fixed! 200

Thanks to all who posted regarding my 86 240 LH 2.2 with malfunctioning CIS system (engine would rev very high when plugged in). Several posts pointed to a bad ECU. I replaced the ECU (544) this morning with a used one from pick-a-part and now the CIS works perfectly!

Cliff







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