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Eric Pinsker-Smith
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@JFP in PA not sure im following; the O2 sensor delayed reading implies that the cats are either leaking or not flowing air fast enough (clogged), but examining them closely with a scope doesn't reveal any clogs or anything. They are also new, and the fact that the code can trip on both banks makes me think this is not the case. Assuming the "sniffer" just sees that the exuast gasses meet emissions specs, which i think is what they would see, what would my next steps be? Thanks, Eric -
@JFP in PA i was thinking that too, but after diving in more, it seems that the aftermarket cats 1) have not caused this issue on the other 130+ vehicles they are on, and 2), the cats are LESS restrictive than the factory ones, which would serve to decrease the O2 sensor response time instead of increasing it. That's what has me so confused.
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Hi All, I have a 1999 C4, and i have really hit a wall with CEL Code 1276 ("aging of bank 1 upstream O2 sensor ahead of Catalytic Converter"). Last year, I got a new short block from Porsche, and attached to that a new FabSpeed exhaust X-pipe with new cats. They guarantee it will not trigger a CEL (and they say they have never encountered this issue before). My symptoms are as follows: If I drive on the highway for 45+ mins, on the following drive cycle, I get Code 1276 (and sometimes 1275 too). If I clear the code, it will not trigger unless i do some longer highway stints. When this first occurred, i replaced the upstream O2 sensors with new Bosch ones. When it kept happening, I also did the downstream ones. Then, I replaced the mass air flow sensor, after reading it can cause this issue. We smoke tested the exhaust to ensure its not leaking. We also flashed the ECU with Porsche's latest stock software, just in case there was an old tune or something causing this. When plugged into a durametic, it looks like the upstream-to-downstream O2 sensor response time that's triggering this CEL is ~1.2 seconds (the CEL trigger threshold is less than one second). When using a gas like propane to test O2 sensor response, the response seems instantaneous. Does anybody have any thoughts on what i might do next? Im tearing my hair out on this one. Thanks, Eric
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Hardtop adjustment
Eric Pinsker-Smith replied to mpikounis's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)
Does anybody have the TSB on adjusting the hardtop to eliminate noises? My and my ears would greatly appreciate it! My email is ericpinskersmith@gmail.com. Thanks!
