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Discussion Starter #1
Hello all,

Last time I put my car through an MOT it failed on emissions. Originally the car (206 '04) had a mk2 cat/manifold but I've since installed a tublar manifold and a mk1 cat which is located further down the exhaust system.

Questions is will this most likely be the cause of my issue as, the dual o2 sensors are connected to the tublar manifold but they wont be see any difference in readings as there isnt a cat between them.

When I first had the manifold fitted it did pass emissions but in recent years its been an issue. I was running a Wideband AFR gauge for a while but that has since failed and waiting a replacement sensor. I've since learned that ProSport gauges are not that great in quality. However when it was working it was showing the correct AFR.
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