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DISCUSSION => Engine + Driveline => Topic started by: SonomaGTLN2 on July 30, 2009, 07:28:16 PM

Title: Another ICV Saga
Post by: SonomaGTLN2 on July 30, 2009, 07:28:16 PM

When I first did the swap it seemed my car had a slightly searching idle (300 rpm or so fluctuation) so I cleaned out the ICV.  Ever since it's been idling nicely at 900 rpm.  For curiosity sake I hooked up a dash light to see if I had any CEL codes coming.  Lo and behold, the ICV code was there so I reset the code and voila, the next time I started it, no code.  On the subsequent drive, I was cruising at 55mph and after 30 seconds the light comes on.  When I let off the throttle, the light went off and remained off until my car was idling for about 30 seconds then came back on.  It seems like at any steady-state throttle position the light will come on. After the CEL came on when idling, I checked the code and it was the ICV code again...does anyone have a clue as to what might be going on?  Also worth mentioning if I unplug the ICV the code happens immediately, not after 30 seconds.

Thanks,
AJ

Title: Another ICV Saga
Post by: SonomaGTLN2 on August 06, 2009, 04:08:44 PM

Anyone?

Title: Another ICV Saga
Post by: Danny707 on August 06, 2009, 04:18:54 PM

Lambda code 1221 I'm guessing, your car is running too rich or too lean for an extended period.

Title: Another ICV Saga
Post by: nigel on August 07, 2009, 12:18:12 PM

Mine does the same thing... thought it was a small vacuum leak, but ICV issue makes more sense. Not sure what to do about it, though.

Title: Another ICV Saga
Post by: SonomaGTLN2 on August 10, 2009, 05:06:10 PM

I get around 29 mpg in my E21 brick and I powered the icv manually and it actuates so I don't know what could be wrong there.  It's just strange that the light goes on and off while driving.