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Problem only when car gets warm

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    #1

    Problem only when car gets warm

    Just recently my car has been throwing codes and acting strangely. When my cars starts first thing its fine runs good (as good as it can with 275,000 miles) anyways, if i drive the car around for a while the CEL comes on. But sometimes it will run just fine and other times it will stutter quite a bit. I checked the codes today and i got codes 9 and 17. Now i might have gotten wrong info but i read that as long as my speedo and cruise work (which they both do) the sensor is fine. So it leaves me with code 9 which is Cylinder position sensor. Would something like that effect both cold and warm and would it cause my stuttering problems. Any help would be awesome.
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    #2
    Chances are you'll just need to replace your distributor. The only other thing i've seen cause 9 is loose injector clips and faulty wiring.

    02 Crv
    02 silverado Ex cab Z71, 2011 TRD 17" wheels, 245/80/17, ls1 cam, AFE intake, 3" catback, tuned by Larry at LSXperformance&pcm tuning driven daily.
    92 Acura Legend colbalt blue LS Coupe, custom intake, custom vibrant 2.5 cat back, led cluster and high beams, 2016 Coyote GT 18x8 wheels 235/40/18.
    Coming Soon Tein TSX coilovers.

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      #3
      Any idea why it would run fine when cold and then act up when warm.

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        #4
        When the car is cold, it is running in "open loop mode". Essentially, it is running on pre-set fuel tables, and not by sensor feedback. Once it warms up, it runs in "closed loop mode", which means it's adjusting fuel by sensor input. Once the car warms up, if it's relying on malfunctioning sensors, it won't run properly.

        Your symptoms also sound similar to those of a failing oxygen sensor, so that may be something to consider replacing as well (NTK/NGK or Denso only... do not use Bosch.) Sometimes a failing o2 sensor causes issues before it starts throwing codes (which would be 41 and 43.)

        And yes, the most common method of fixing the CPS is by replacing the distributor. I'm sure you CAN take it apart and replace just the sensor, but I've never known anyone on here to do it. Never had a problem with it myself, so I have no firsthand experience.






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