Koren Clutched January 12, 2006 Share January 12, 2006 change extractor/pipe/muffler.. nothing original was left on the exhaust system.. ↡ Advertisement Link to post Share on other sites More sharing options...
Koren Clutched January 12, 2006 Share January 12, 2006 i removed both cats.. Link to post Share on other sites More sharing options...
Superio Neutral Newbie January 12, 2006 Share January 12, 2006 Does the check light comes up when u put extractor and cat? Understand some cars will some cars won't depending on ECU also.Also there are devices to control the voltage signal sort of like to cheat the ECU. Under what kind of conditions or cars will installing such exhuast mod cause the check light to appear? Link to post Share on other sites More sharing options...
Koren Clutched January 12, 2006 Share January 12, 2006 no check light.. hyundai ecu quite stupid.. now revert back to stock liao.. better dun touch ur exhaust Link to post Share on other sites More sharing options...
BlueSi Neutral Newbie January 12, 2006 Share January 12, 2006 ODB II ECU's will throw a CEL it you temper with your secondary O2 sensor (the one on your CAT) OBD I ECU's wont coz back then cars dont have a secondary O2 sensor anyways. The inhabitor device dont always work. On some cars, ECU's can be swaped to prevent the CEL. I swaped my OBD II to a reflashed OBD I on my EK Civic, havent got any problems so far. Link to post Share on other sites More sharing options...
Dennisk Clutched January 12, 2006 Share January 12, 2006 ...... Link to post Share on other sites More sharing options...
Koren Clutched January 12, 2006 Share January 12, 2006 rov veri on the ball.. Link to post Share on other sites More sharing options...
Superio Neutral Newbie January 12, 2006 Share January 12, 2006 I drive a KIA car. Have 2 O2 sensors. If the cat is placed in between the 2 sensor, i presume it will be after the primry before the secondary. Wouldn't the primary detect something is wrong? Link to post Share on other sites More sharing options...
BlueSi Neutral Newbie January 12, 2006 Share January 12, 2006 The primary O2 sensor is in a feedback loop with your ECU. It checkas the quality of air exiting your engine and make small changes in fuel injection or spark timing to give you the most efficient burn. The secondary O2 sensor on OBD II equipt cars does not feedback. They are there to tell you it your CAT is working. That is why it is possible to attach a device to give this sensor a faulse reading and not hurt your car's performance. Link to post Share on other sites More sharing options...
Normal_aspirated Clutched January 12, 2006 Share January 12, 2006 Cars after year 2000, ODB I with one O2 sensor is euro3 spec. Most piggybaggies worked becuz the ecu is less smarter (using 16-bit cpu) Cars after year 2003, ODB II with two O2 sensors is euro4 spec. Many piggybaggies dun worked tat well is becus the ecu r using much faster 32-bit cpu like intel i486.....so is "smarter". Comes euro5 b4 end of 2006........three O2 sensors and even faster 32bit ecu prob pentium I or II cpu...........modders become "siow" liao..... 3rd party piggybaggy ecu must do catchup to outbeat the system. Link to post Share on other sites More sharing options...
Seanboi 1st Gear January 13, 2006 Share January 13, 2006 they didnt detect ur extractor? so u changed the whole muffler rather den operate i suppose? Btw, (decat 2)den put Hi-Flow cat better or decat one cat? I heard ppl decat liao dey sae the muffler got metal sounds... Link to post Share on other sites More sharing options...
Koren Clutched January 13, 2006 Share January 13, 2006 why bother putting a hi-flo cat since its still illegal? but comparing decat1 and onli hiflo cat.. the hiflo cat will be a better set up.. Link to post Share on other sites More sharing options...
Unclemobile Neutral Newbie January 14, 2006 Share January 14, 2006 Decat and got metal sound on the muffler... interesteing. I did that to both my previous car and it sounded alright. Link to post Share on other sites More sharing options...
Lorrliew Neutral Newbie January 15, 2006 Share January 15, 2006 Metal sound? Maybe they refer to high flow exhaust sound through the 'straight through pipe'. Link to post Share on other sites More sharing options...
Seanboi 1st Gear January 15, 2006 Share January 15, 2006 oic.. i tot high flow cat was legal. haha Link to post Share on other sites More sharing options...
Seanboi 1st Gear January 15, 2006 Share January 15, 2006 tts wad my fren claim n insist lor.. i oso no idea.. his logic veri interesting one. haha Link to post Share on other sites More sharing options...
Seanboi 1st Gear January 15, 2006 Share January 15, 2006 tt sound so loud until inside the car oso can hear? Link to post Share on other sites More sharing options...
BlueSi Neutral Newbie January 15, 2006 Share January 15, 2006 Onboard Diagnostics Level II (ODB II) engine management controls -- equipped with sophisticated standardized diagnostic capabilities and uploadable flash EEPROM recalibration -- give authorized users powerful self-diagnostics + easy software upgrades, debugs, or the ability to substantially reprogram the behaviour and personality of an engine. OBD II has been required on all new cars sold in the US since 1996. Government mandated antitampering countermeasures provide substantial but not insurmountable barriers to entry for OBD II reprogramming. ↡ Advertisement Link to post Share on other sites More sharing options...
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