07-27-2015, 02:37 AM | #239 |
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I suppose a cat could be added downstream, then the O2 relocated behind it. But I would really like a definitive on this one because it's my daily.
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07-27-2015, 04:23 AM | #240 | |
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Though then again CEL can appear even on catted aftermarket headers .. |
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07-27-2015, 05:28 AM | #241 |
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Guys, look up spark plug defouler trick.
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07-27-2015, 09:35 AM | #242 |
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If anyone us worried about emissions/inspection tests then there is an easy solution for you:
Step 1) Uninstall the header Step 2) Reinstall stock header Step 3) Retune back to stock If you are really worried that much about headers passing tests, you shouldn't be shopping for headers. |
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07-27-2015, 03:17 PM | #243 |
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We make no such claims about the ACE; no header is immune to a O2 sensor CEL unless it is OEM, or fully identically functional compared to OEM (which defeats the purpose).
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07-27-2015, 08:46 PM | #244 | |
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It seriously doesn't take that long, it's only every two years, and it's a good chance to inspect your car anyway. |
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07-27-2015, 11:40 PM | #245 | ||
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No wonder that even while swap back sounds simple, there are many, given choice, wishing to avoid that. Just that choice is not there .. Last edited by churchx; 07-27-2015 at 11:55 PM. |
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07-28-2015, 01:20 AM | #246 | |
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Your post conclusively tells me that you have ZERO clue as to how the system operates, and are purely speculating as to how you *think* it works (hint: that's not how it works). |
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07-28-2015, 01:28 AM | #247 |
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I suppose what this is really going to come down to is whether or not you have state emissions testing performed. If the car can't give you a readiness monitor that is favorable enough to pass emissions, it will only hurt the sales of this product.
Many people live in areas where OBD2 is a requirement. So... buy this header (or any header) if you want a slow race car you can't register for street use, I guess. But hey, at least it will be fun on the track that 1% of americans live close to. Or you can trailer it I suppose. Or buy another car that's faster... the options are there. Basically, what I want to know: How do people register their vehicles with turbos and headers? I'm genuinely curious what is going on with the tune that disables the P0420 code. Is the emission monitor for cat function disabled? Or does the tune modify the values the computer deems is acceptable without throwing an error code? |
07-28-2015, 01:35 AM | #248 | |
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If you use a Flex Fuel kit like the Delicious Tuning kit, then you disable ALL CELs that involve the secondary O2. Otherwise your car will throw all kinds of codes, since the secondary O2 sensor signal will be completely out of whack; it's sending data for ethanol content, not O2 readings (the DT kit takes over the secondary O2 sensor input). |
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07-28-2015, 01:40 AM | #249 |
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That's exactly what I needed to know, Mike. Thanks for the response. I know how to trick the ECU into thinking everything is ok by using spacers/capacitors etc, but I'd rather a software workaround to keep it simple.
Thanks again. |
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07-28-2015, 02:25 AM | #250 | |
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But subject seems interesting to read on. Can you advise any hints/articles/urls to read on it in addition of generic googling on O2 sensors/Cat efficiency check+ECU or whatever other search terms may help finding rtfm on that? |
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07-28-2015, 02:34 AM | #251 |
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Coheed: btw, there imho there is nice option of supercharging instead of adding turbo (with added need to mod exhaust for turbo to work from that) but leaving original header/cats stock/instact. Both performance gains and stock cat configuration, though some tune for SC still is necessary, at least no need to disabling cat checks, no?
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07-28-2015, 02:44 AM | #252 |
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Not having a CEL is one thing. But the ECU making a positive reply to the cat diagnosis completion is another. It's a lot harder to do without manufacturer support. Cat diagnosis calibration is an engineer full time job.
In fact this job is not done by the car manufacturer, but by the ECU/injection system manufacturer. Is it not possible to cheat inspection in the US ? I plan on going FI with my car in France, which is illegal and will drive without the local MOT (as I drive on the road from home to the track only, it's not a DD) Police only arrest crapy looking cars out there (or sadly, people with dark skin) If I want, I can buy a MOT sticker from a MOT agent that just want easy money (without seeing my car, obviously)
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