Alright now lately i have been having a bouncing rpm rate while decelerating its usually between 1-3 thousand rpm and even when the car is in neutral it still stays up around there while i am rolling. The car is still making alot of power and i inspected for vaccum leaks but eveyrthing seams to be fine. I also checked the plugs and they are perfect. Could this be a cause of a leaking intake manifold? The car has a b16b with a 55 shot of wet nitrous and the motor has been running great for the past year and also with the nitrous but this is an issue that i have just come across. The car doesnt hesitate when i am excelerating so i am somewhat stumped. Any help would be apreciated.

 

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