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I would go get a proper tune for a start. No tuner in their right mind would/should tune above 90% injector duty. Go larger injectors, get a better fuel pump, go for a z32 or q45 afm, get an EBC and decent tune.

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Thanks for the help ^^ will do that ..

The car was last tuned by erd on the coast at beginning of the year, he's a good tuner by the people I've asked and was running awsome till a month ago ..maybe sum1 played with hand controller ? And when I'm slowing down the car tends to rev by it self ?

Thanks for the help ^^ will do that ..

The car was last tuned by erd on the coast at beginning of the year, he's a good tuner by the people I've asked and was running awsome till a month ago ..maybe sum1 played with hand controller ? And when I'm slowing down the car tends to rev by it self ?

I have heard of PFC's resetting themselves. So if it has, and is running extra boost (through boost tee or different actuator) it will try compensate and that's where your issues lie. Or yes, someone could have easily messed with the hand controller. Honestly I would be doing this sooner than later. And if you have a daily, I would be driving that. The last thing you want is engine failure or damage due to something so small and relatively cheap to repair.

How about the simple things like, for example,

The weather. It is summer now. It's humid, hotter and the air is less dense

So do what? Wait till its cooler?

That would still mean the tune was on an absolute knife edge.

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