High Flow Cats and after market exhaust throw Check Engine Light
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From: South Georgia/East Florida
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Yes. Thanks and thanks Hammer. I saw that thread before and fowarded the info to my friend in need. I searched as much as I could handle before posting. I'm just trying to get as much info as I can before going foward with the fix. He has tried something like this that he called "spacers" but he put them on every O2 sensor. So Im trying to determine the exact ones he needs to due with P0420 code. I am also a little confused about the bit with SOS pad. Basically I can see how frequent this problem is and he has dumped so much money into fixing that I wanna steer him straight once and for all cause I know he has to pass emissions soon and he's to the point of giving up but I know with proper research and help that we can fix his issue. Sorry for the longwindedness and thanks for everyone's help!!
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Yes. Thanks and thanks Hammer. I saw that thread before and fowarded the info to my friend in need. I searched as much as I could handle before posting. I'm just trying to get as much info as I can before going foward with the fix. He has tried something like this that he called "spacers" but he put them on every O2 sensor. So Im trying to determine the exact ones he needs to due with P0420 code. I am also a little confused about the bit with SOS pad. Basically I can see how frequent this problem is and he has dumped so much money into fixing that I wanna steer him straight once and for all cause I know he has to pass emissions soon and he's to the point of giving up but I know with proper research and help that we can fix his issue. Sorry for the longwindedness and thanks for everyone's help!!
Oh, don't use an sos pad, get 0000 steel wool. They sell it in most home improvement stores.
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Joined: Jul 2007
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From: South Georgia/East Florida
Another cheap and quick fix would be to put in a cooler thermostat although not as foolproof as using non-foulers. The reason this sometimes works is because it will richen the A/F mix. The more fuel/less air produces a slightly longer burn in the cylinder so the exhaust gasses are slightly cooler as they are scavenged into the exhaust.
Many times it's the heat of the gasses being pulled faster by a more open exhaust that causes the CEL, they simply haven't cooled enough when they reach the sensor.
Of course the non-foulers get the O2 out of the mainstream into cooler air so they fix this one instance as well.
Many times it's the heat of the gasses being pulled faster by a more open exhaust that causes the CEL, they simply haven't cooled enough when they reach the sensor.
Of course the non-foulers get the O2 out of the mainstream into cooler air so they fix this one instance as well.
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Joined: Jul 2013
Posts: 157
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Another cheap and quick fix would be to put in a cooler thermostat although not as foolproof as using non-foulers. The reason this sometimes works is because it will richen the A/F mix. The more fuel/less air produces a slightly longer burn in the cylinder so the exhaust gasses are slightly cooler as they are scavenged into the exhaust.
Many times it's the heat of the gasses being pulled faster by a more open exhaust that causes the CEL, they simply haven't cooled enough when they reach the sensor.
Of course the non-foulers get the O2 out of the mainstream into cooler air so they fix this one instance as well.
Many times it's the heat of the gasses being pulled faster by a more open exhaust that causes the CEL, they simply haven't cooled enough when they reach the sensor.
Of course the non-foulers get the O2 out of the mainstream into cooler air so they fix this one instance as well.
Last edited by TRO14; Aug 9, 2013 at 07:59 AM.