Idle woes once again.....

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by det45, Aug 30, 2000.

  1. det45

    det45 1/2 ton status

    May 23, 2000
    Likes Received:
    San Antonio Texas
    Well I replaced the o2 sensor on my 89 K5 TBI and I am still having idle problems. Checked the ECM for codes and got a 21 code. That turns out to be the Throttle Position Sensor. I just bought one at advance auto and I'm going to install it right now. The reason why I am posting this post is because I've seen alot of people on this fourm complain about TBI idle problems. I'll let you all know what happens later on today when I'm done R&R the throttle positioning sensor........Det45

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