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Dont know what to do from here...

E39 (1997 - 2003)

I have a 2002 530i that runs great, until it feels as if the gas isnt reaching my engine properly, and causing it to lose acceleration drastically until eventually spitting and sputtering to a stop, im thinking caty converter, diagnostic recommended i inspect exhaust system and cat, and spit...
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  Casper859e39 · Dec 19, 2015
530i catylitic disa e39 2002 exhaust system icv loss of hope loss of performance loss of power loss of throttle maf vacuum leak
Converter stopped up!?!

E39 (1997 - 2003)

Salutations friends I am gladly but aggravatingly driving a 2002 530i that intermittently loses power , as in acceleration , it will sort of kick and become almost irrelevant to give it gas BC I'm not going over 10 mph and it has me thinking its my cat converter , or the rear o2 sensor because a...
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  Casper859e39 · Dec 19, 2015
2002 back pressure catylitic e39 help advice needed loss engine power loss of performance o2 sensor
1998 Z3 with excessive NOX, HELP

E36/7 Z3 (1996-2002)

My 1998 Z3 passes the CO2 easily but not eh NO part. It is fine at low rpm's but not under load or at high rpm. It is tuned perfectly and has a new ODB II catylitic convertor. It doesn't code for Oxygen sensor. Any sugestions??
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  JeKK · Sep 9, 2008
catylitic converter no2 nox smog

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