Hello All,
I had the code 1222 come up for a while on my 1993 BMW 740i. If I reset the codes, I could drive for 3 days or so perfectly. I have gone through this cycle twice now.
One thing this car has done for a while is on cold startup, really buck and idle rough, until you tap the gas a little and it would clear right up. (this may be related to a minor fuel starve problem though and unrelated to the CORE issue. I have tested the past few days leaving the key "on" for a few more seconds before cranking and the car is starting smoother. As though giving a few more seconds for the fuel pump to get the gas up there is helping.)
Most recently, the 1222 code hasn't been there for three days now, when for no reason at all while driving today, I got a 1213. This results in the car really bucking at idle (stop lights, etc.) and generally running rough. I have not reset the code yet as I would like to see what the group suggests.
I have looked, for what I know anyway, for vacuum leaks--obvious things like a vacuum hose pulled off, etc. The first time I examined the engine, I saw that the idle control valve seemed to not be seated into the throttle body as tight as it should--fixed that. Is there anything else I should look for that could cause a "lean reading?"
Thanks in advance for your help,
Egg Raid