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    CEL goes of when AC is on

    Had a recent problem with check engine light. The code given was p0171, "bank one running lean". The car had a loping idle and hesitated every time i got on the throttle. I couldn't figure out the problem and neither could any mechanics so i drove it for a few months with the CEL on. Recently...
  2. I

    tps and idle

    what's normal tps range for a 2003 mazdaspeed protege??? I still haven't figured the P0171 code. My idle is around 700 and the tps range is around 10... just wondering if those number are out of the ordinary.
  3. I

    bad idle, cel light on

    Just a while back my MSP thew a CEL. My idle became inconsistently erratic and RPM's would drop to zero if i took the load off the engine too fast while driving. Took it to have the code read by a friend who had a reader and it gave P0171(bank 1 too lean). I heard i was a common problem so, i...
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