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Question..No Check Engine... MR Catless TBE...Backfire


zhabodav

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Just like the title says, Catless TBE...no check engines about misfire or anything.... I had the CBE first and when I installed the TBE I noticed a lot of backfire when my engine is fully warm. I am also running Cobb AP stage 1.... had it at Stage 2 with the same effects. Am I running lean? Is this normal?
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This is probably caused by the cobb map. I've not seen exactly what all they change on their ots maps, but they probably have changed your a/f ratios to make some more powa and as a result can cause to you run slightly rich. Then in additon to being catless you will have some unburnt fuel "pop"...it's mostly audible because you have no cats and thus a freer flowing exhaust. At least without the carts you won't damage them...that's about the only thing that will be damaged with "backfiring"

 

All in all, its not a big deal....however if you are truly tbe (meaning downpipe, mid, y and cans, you need to be running a stage 2 map.

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i had the MR Catless TBE on my car and between shifts it used to pop all the time. Its just from being catless cause my friends car also does it. I now have a Borla CBE but it still pops here and there. Not as much as the Megan though. It was definatly more pronounced with the MR system. Nothing to worry about.
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