hey folks. hoping someone can help me with this. i have an astra-f GSi saloon (i live in ZA) and i'm having problems with it.
first, the error code i get from the ECU is 121 - running lean. i don't have an O2 sensor (lambda sensor) - instead, these cars came out with a pot - currently it is set to factory spec and i have tried adjusting it. no matter what, i still get that error 121 any suggestions please?
on to ticking over problem.. sometimes sitting at traffic lights, the RPM drop to about 500.. once it even "went dead" upon startup, the RPM sometimes start at 500, and bounce up to 950 (where it should be), but most of the time it starts at 1500-2000RPM, and drops down SLOWLY to 950. i have cleaned everything in the throttle body, cleaned out the idle control valve, had the injectors cleaned, and i can't find any evidence of an air leak. i'm guessing it may be the MAF - i have the hot film type. how do you clean them, or can't you? any other suggestions most welcome!