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Hi, just got a new intercooler fitted and now everytime i put my foot down in 3rd gear and get to about 5-6k revs the car judders like mad, like backfires but wants to keep going? Any idea what this could be? Was working fine before with the other intercooler...

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With this cold air its gonna be especially hard to keep the boost from spiking to fuel cut levels on a CT9 setup.

The HKS actuator is threaded so wind it down a bit and see if that helps, although probably not, CT9s are bad at regulating their boost the wastegate is very small, you could try porting it out a wee bit. But the exhaust housing might have a few cracks like most of them so i wouldnt bother.

Things you can do are restrict the air getting in, like move the filter back if its at the front. Also put a bung in the exhaust.

Could also go down the route of having a FCD put in but not many people on here like them, they have a bad rep for blowing up engines when the fueling has not been adjusted afterwards.

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How do i wind the actuator down? Sorry clueless about cars lol

All HKS actuators are adjustable. The length of the arm depends on how much boost you run. You need to with unbolt or unclip the arm and then make the arm longer to reduce the boost. I may be wrong but I think there is a guide on here

Adjusting the arm to 128mm will run 0.5 bar

124mm is 0.8 bar

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  • 3 weeks later...

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