HFC and check engine light
Originally Posted by dohcvtec
I have the Works HFC and have never had a CEL, putting around 15,000 miles on it. Lately my friend "got boost" has been getting them with his Works HFC. He has the works DP, and cat back also.. along with GFB BOV and 272 cams, stock ecu. Seems like this is only happening to some people.
Originally Posted by Alias
Yes, it does seem that way. I guess if you are lucky, you won't get it. Unfortunately, some of us are the unlucky ones. Hopefully, WORKS will come up with a defeat very soon.
stock cat or testpipe with the O2 fix.
.
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Originally Posted by Alias
Yes, it does seem that way. I guess if you are lucky, you won't get it. Unfortunately, some of us are the unlucky ones. Hopefully, WORKS will come up with a defeat very soon.
HFCs work by allowing quicker exhaust gas through-put (fewer cells per inch). If the levels of precious metals on the remaining cells aren't increased accordingly to remove pollutants then you will almost certainly have CEL problems sooner, or later. People seem to think that the CEL from a HFC is a "good" thing because it proves that the cat is flowing more efficiently than the OEM one. This is not the case. The CEL shows that the cat is less efficient.
Also, the other critical parameter (apart from the levels of precious metals) is the basic substrate of the cat.....ceramic cats are more prone to "melt-down" than SS cats, especially if your car isn't tuned properly to account for aftermarket mods.
Originally Posted by MTMS4
... People seem to think that the CEL from a HFC is a "good" thing because it proves that the cat is flowing more efficiently than the OEM one. This is not the case. The CEL shows that the cat is less efficient.
Originally Posted by MTMS4
If you are getting a CEL because of a real catalyst inefficiency then a "defeat" won't help in the long run. Once you undergo emissions testing they will know whether your cat is working properly or not.
HFCs work by allowing quicker exhaust gas through-put (fewer cells per inch). If the levels of precious metals on the remaining cells aren't increased accordingly to remove pollutants then you will almost certainly have CEL problems sooner, or later. People seem to think that the CEL from a HFC is a "good" thing because it proves that the cat is flowing more efficiently than the OEM one. This is not the case. The CEL shows that the cat is less efficient.
Also, the other critical parameter (apart from the levels of precious metals) is the basic substrate of the cat.....ceramic cats are more prone to "melt-down" than SS cats, especially if your car isn't tuned properly to account for aftermarket mods.
HFCs work by allowing quicker exhaust gas through-put (fewer cells per inch). If the levels of precious metals on the remaining cells aren't increased accordingly to remove pollutants then you will almost certainly have CEL problems sooner, or later. People seem to think that the CEL from a HFC is a "good" thing because it proves that the cat is flowing more efficiently than the OEM one. This is not the case. The CEL shows that the cat is less efficient.
Also, the other critical parameter (apart from the levels of precious metals) is the basic substrate of the cat.....ceramic cats are more prone to "melt-down" than SS cats, especially if your car isn't tuned properly to account for aftermarket mods.
Originally Posted by MTMS4
If you are getting a CEL because of a real catalyst inefficiency then a "defeat" won't help in the long run. Once you undergo emissions testing they will know whether your cat is working properly or not.
HFCs work by allowing quicker exhaust gas through-put (fewer cells per inch). If the levels of precious metals on the remaining cells aren't increased accordingly to remove pollutants then you will almost certainly have CEL problems sooner, or later. People seem to think that the CEL from a HFC is a "good" thing because it proves that the cat is flowing more efficiently than the OEM one. This is not the case. The CEL shows that the cat is less efficient.
Also, the other critical parameter (apart from the levels of precious metals) is the basic substrate of the cat.....ceramic cats are more prone to "melt-down" than SS cats, especially if your car isn't tuned properly to account for aftermarket mods.
HFCs work by allowing quicker exhaust gas through-put (fewer cells per inch). If the levels of precious metals on the remaining cells aren't increased accordingly to remove pollutants then you will almost certainly have CEL problems sooner, or later. People seem to think that the CEL from a HFC is a "good" thing because it proves that the cat is flowing more efficiently than the OEM one. This is not the case. The CEL shows that the cat is less efficient.
Also, the other critical parameter (apart from the levels of precious metals) is the basic substrate of the cat.....ceramic cats are more prone to "melt-down" than SS cats, especially if your car isn't tuned properly to account for aftermarket mods.
Only one thing to say after reading this, I am so glad to live in Florida! WORKS TBE (Old AB with no muffler) with test pipe, Perrin O2 Sim. Have never thrown a code.
YEA, no emissions! I love my WORKS exhaust!
YEA, no emissions! I love my WORKS exhaust!
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From: San Francisco
The questions that need to be addressed are
1. which specific code is coming up and
2. what Non-WORKs modifications were done to your EVO? from downpipes to blowoff valves to cams, etc.
Hundreds of our customers who use are using our P2, WORKS exhaust systems and WORKS 269 cams with WORKS HFC's have not had any issues.
1. which specific code is coming up and
2. what Non-WORKs modifications were done to your EVO? from downpipes to blowoff valves to cams, etc.
Hundreds of our customers who use are using our P2, WORKS exhaust systems and WORKS 269 cams with WORKS HFC's have not had any issues.
Originally Posted by kirk@WORKS
The questions that need to be addressed are
1. which specific code is coming up and
2. what Non-WORKs modifications were done to your EVO? from downpipes to blowoff valves to cams, etc.
Hundreds of our customers who use are using our P2, WORKS exhaust systems and WORKS 269 cams with WORKS HFC's have not had any issues.
1. which specific code is coming up and
2. what Non-WORKs modifications were done to your EVO? from downpipes to blowoff valves to cams, etc.
Hundreds of our customers who use are using our P2, WORKS exhaust systems and WORKS 269 cams with WORKS HFC's have not had any issues.
.
Originally Posted by kirk@WORKS
The questions that need to be addressed are
1. which specific code is coming up and
2. what Non-WORKs modifications were done to your EVO? from downpipes to blowoff valves to cams, etc.
Hundreds of our customers who use are using our P2, WORKS exhaust systems and WORKS 269 cams with WORKS HFC's have not had any issues.
1. which specific code is coming up and
2. what Non-WORKs modifications were done to your EVO? from downpipes to blowoff valves to cams, etc.
Hundreds of our customers who use are using our P2, WORKS exhaust systems and WORKS 269 cams with WORKS HFC's have not had any issues.
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From: Sacramento, CA
Originally Posted by kirk@WORKS
The questions that need to be addressed are
1. which specific code is coming up and
2. what Non-WORKs modifications were done to your EVO? from downpipes to blowoff valves to cams, etc.
Hundreds of our customers who use are using our P2, WORKS exhaust systems and WORKS 269 cams with WORKS HFC's have not had any issues.
1. which specific code is coming up and
2. what Non-WORKs modifications were done to your EVO? from downpipes to blowoff valves to cams, etc.
Hundreds of our customers who use are using our P2, WORKS exhaust systems and WORKS 269 cams with WORKS HFC's have not had any issues.
I dont know what code since I was too cheap to buy an ODBII scanner.
FWIW, I started this thread. For whatever reason, the CEL went away. Same setup, same gas etc. Hasn't returned in months. Maybe the CEL light bulb went bad or I finally destroyed the O2 sensor entirely with all that brake cleaner!
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