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Steve2000GT
02-23-10, 05:45 PM
After installing the mil eliminators on my 00 gt and clearing the code... every few weeks (probably 3-4) the light will come back on with the same code. The code is P0430 catalyst system below threshold bank 2. I got a second set of mil's and put them on... same result. I am wondering if because i ran the car for a few weeks without MIL's if it somehow fouled the oxygen sensor and i need to replace that? Anyone have any ideas?

the setup is a borla cat back with a bbk offroad x-pipe.

Thanks for any input. Much appreciated.

-Steve

02stangGT
02-25-10, 08:25 AM
i know when i bought mine i had american muscle send another set becuase sometimes it miss reads. call them up (if thats there you bought them) and have them send you another pair. they said this is a common issue with these

Steve2000GT
02-25-10, 04:57 PM
I bought them from American Muscle... i did call them and they sent another pair.. what are the chances this 2nd pair is no good too?

02stangGT
02-25-10, 08:52 PM
idk after the plug in didnt work i went with the other pair they sell were you splice them in yourself. but i guess just wait and see. also i heard that ford motorcraft 02 sensors are the best to use. and if you have bosch 02 sensors try switching. they are like 115 for one though so can get expensive.

SloSVO
02-28-10, 09:33 AM
the up stream sensors wouldn't have anything to do with that.. try different mils or shut off the downstream o2s in the tune..

wti01bullitt
03-06-10, 07:13 AM
I had the same issue with mine and finally went to the mtoorcraft ones and the problem hasn't been back. If you need some PM and I'll see if I can get you a break on the price here at Five Star.

Steve2000GT
03-17-10, 07:50 PM
just for the hell of it i pulled the left rear o2 and put it on the right side and vice versa with the other o2... light came back on a few weeks later and the code was for bank 1 this time instead of the previous code of bank 2..... now know its one of my 02s that are bad... only 70k miles on them but i guess things happen. Thanks for the input any how.

-steve

Steve2000GT
04-19-10, 07:14 PM
Turns out it was the MIL's from americanmuscle that were no good. Hooked up to the scanner to monitor o2 oscilation(sp?) they were working properly most of the time but every so often would glitch and flag the computer and after a certain amount of flags would put my service engine light back on... went to radio shack and made my own harnesses (6 bucks in parts) works great now.

BurnTire
04-19-10, 09:26 PM
Glad to hear you got it worked out.

phatkat
06-07-10, 08:51 PM
May I ask a stupid question here???

Will a 98 GT require MIL eliminators? Someone told me they were only for the '99-up.....

fazm
06-07-10, 09:05 PM
should be fore 96 and up if you are planning on going through smog.

this is of course assuming you are removing the catalytic converters

phatkat
06-07-10, 09:42 PM
I thought it was ALL OBD-II Stangs, I just asked the wrong guy! Thanx!

D3VST8R96GT
06-13-10, 01:04 PM
my MILs never worked ... now i throw a lean code too

02stangGT
06-13-10, 02:27 PM
check your o2 sensors. the plug in ones didnt work for me but the ones you splice in yourself works on my car. ford motorcraft o2 sensors are the best out there.