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theres a sensor at the back of the intake manifold, abit hard to reach but it has 2 bolts, take it out and clean it, its probably full of carbon. thats the iacv. then you should have another on the bottom of the throttle body, same thing, unbolt it and clean it, thats your fitv.
also you can try cleaning your engine with abit of carbi cleaner, just spray into your throttlebody when it idles, repeat a few times as it will stall, you should see any carbon build up come out your exhaust.
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thread on this in the diy section.
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Clean the throttle body and see how that goes. It may look clean when visually inspecting it, but looks can be deceiving. You need to clean out the various piping inside the throttle body. Most likely the piping is clogged.
DIY: Throttle Body Cleaning
