Quote:
Originally Posted by Oxyg3n
After I had my Tomei EL Catless headers installed (stock OP/FP/Perrin Catback), I noticed that there was reduced initial throttle response and (potentially due to placebo) lower power in the low rpm range (idle-2500rpm). The first half inch of the throttle seems more or less dead whereas before the header install, it felt very sensitive which helped clutch engagement.
Always wondered if this is because I reduced backpressure by going catless or if this problem points to something such as a leak. Love to hear if any other owners who installed cat-less headers felt this change.
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That type of stuf is normal if you had it tuned after installing such parts. The ECU has to relearn the throttle position-power delivery. If you're still experiencing this, it could be a bad tune.