CODE 1221 and idle surge [Archive] - Bimmerfest - BMW Forums

CODE 1221 and idle surge

11-30-2009, 07:42 PM
My 92 touring always had an erratic idle when I bought it. Yesterday borrowed my bros maf and ecu to see if that is the problem as I couldn't find a vacuum leak spraying mas airflow cleaner around the rubber parts in the intake.
Also had a weird problem of engine cutting out when I took fast right hand turns didn't do this to left hand turns. Always suspected weak fuel pump. Yesterday cleaned connectors to fuel pump and also banged on the plate going into the pump. Heard the pump sound louder and when I test drove no more cutting out on the fast right turns.
Then while driving home CEL came on and when I parked got the idle surge. Did the stomp test and got code 1221.
Replaced oxygen sensor earlier and CEL is gone but the surge remains. What can cause idle surge?
Will clamp all the hoses by the ICV tomorrow and get a fuel pump at the junkyard.
Any other suggestions are much appreciated. TIA for any help.

11-30-2009, 11:14 PM
I'm having the same issue on my touring