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Hi,
As your Scenic is a 1.9D, it has no turbo.
It's a 65hp engine in a 1,2 ton vehicle so no wonder it is slow.
Tuning your intake is not the best of ideas as far as length is concerned since Renault people are almost anal about this.
If possible, I would revert to standard setup.
This vehicle is not fitted with a MAF sensor as far as I know.
I would check fuel filter and air filter.
Does it spin properly when not loaded ?
Whoever sold you the 1,9D as a sport model was being ironic, I dont even think you can get this engine with upper level of trim (RXT I believe)
Obviously, running air-con is that extra grunt taken out of the engine (if you have it ...)
What's your mileage ?
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