Originally Posted by
Jmac
Yep, means its running rich.
With my 100Cel DP and destroyed muffler mine does this all the time (also 50/50BOV)
but without those mods id be checking for a slight boost leak, most likely culprit is hose on the back of the TMIC.
Also, with a K&N oiled filter might be worth investing in some electrical contact cleaner as the MAF can get a thin film of filter oil over it from the filter.
(The stock on is NOT an oiled filter).
my mps6 was doing the same thing,on gear change, back firing, after cleaning the MAF and retuning it to stock, still had the backfire. Followed this advice, and found the hose on the front of the TMIC that connects to where the BOV mount goes into the engine was lose, bot the stock BOV on to check also, problem flexed, retuned, and GFB BOV back on, working great. Thanks for the advice, the forums win again. Great stuff, thanks.
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