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No mods except for a coke can in the blow off valve (bought like that) Don't know the service history from previous owner. Has had a complete full service. Was happening before I recently got it serviced.. mechanic changed the fuel filter and spark plugs (thinking they were the cause) but problem still persists It happens at any revs. It happens whenever I accelerate

What sort of info?

I forgot to mention. . It's an automatic

Hey all I have a problem with my skyline. Only occasionally I will start it and begin to drive.. then when I'm accelerating it seems to lose power and slightly "bunny hop" the bunny hops are not aggressive. it just doesn't seem to be able to get to higher revs. It does happen when it's cold but by the time it's warmed up it still has the problem.as I said it only does it every now and again. Does anyone have any idea what could be wrong?