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post #10 of (permalink) Old 22nd December 2007
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It was from Diesel Tuning Performance No1 . It has made a big difference as the RX4 is not really good on fuel and our average of 30MPG has gone up to between 37 and 40 MPG! It is better to drive and it loads more tractable so the added torque improves the MPG by needing less throttle to keep it at speed. BUT.....It does mean with more torque the after the old CAT pipe broke the new one buzzes the chassis under acceleration in first and second. If I remove the chip it doesn't happen so it is because of the added power of the chip. I have dialed in even more power as it can be adjusted and the fuel economy has gone up but if you go too far it will smoke and you will lose economy so dial it in carefully if you buy one. About 2 full turns at a time and see how it feels and what it does.
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2000 Scenic RX4
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