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Old 06-19-2005, 12:57 AM   #1
chinkydriver
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Member#: 69771
Join Date: Sep 2004
Chapter/Region: BAIC
Location: Nor Cal
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2002 WRX
WRB

Default CEL mechanical or electronic fix

i have an 02 wrx and about to install a stage 4 kit with utec, catless U&D pipe. Which of these CEL fix should i use? pros & cons? mechanical fix are around $10, and eletronic (Perrin) are around $55. please advice. thanks
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Old 06-19-2005, 01:26 AM   #2
peterex
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Mechanical - it's cheaper, easy to install, and much more practical. Plus, some of the electronic fixes will result in a "not ready" sensor condition that will cause you to fail OBD-2 emissions tests.

A couple years ago, everyone was using the Pony Express MIL eliminator, but since people discovered the superiority/practicality of mechanical fixes, the electronic fixes seem to be less popular on the forums.
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Old 06-19-2005, 01:34 AM   #3
chinkydriver
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Thanks, i was hoping to hear that.
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Old 06-19-2005, 01:36 AM   #4
bofh
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2004 WRB WRX (RIP)

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Ditto, with caveats. The mechanical fix is not idiot proof. We used to think it was, but Subaru's excellent marketing has vastly improved the level of idiots lately, so be for warned. Proper steps...
#1 - Get the fowlers, and drill out 1. The number shall be more than 0, and less than 2. 3 is right out...
#2 - Unscrew the sensor carefully. It is easy to break wires, or bend them enough that they will break later. Then you will be back here bitching about how the mechanical fix does not work... Pop the drilled out fowler on, and then the undrilled out one. Put it all back in again, but carefully.
#2 - Drive a reasonably long highway drive. This will run through the tests. The CEL may come on. If so;
#3 - PULL THE DAMN CEL! The rear sensor throws two different CELs. One is cat inefficiency, which means you drilled out to much. Add a washer, or a nut, or some other small spacer. The other is mumble slow to react. This means it is too far out. Pull it all, and ream out fowler number 2 (the undrilled one) a bit. Lather, rinse, repeat.
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Old 06-19-2005, 01:56 AM   #5
chinkydriver
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i just ordered the part, hopefully everthing will be in before next weekend for me to install. i'll let you know how everything goes. thank you very much for the info.

Long
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