Hey, I was looking through some older threads but didn't find anything remotely conclusive on this issue. On occasion, my car will buck like the fuel was cut around 3500 rpm (about when the VTC kicks in). Theres only 127K on it and it has been well maintained. I was thinking maybe my fuel pump was going but once its above 3500 or so shes good all the way to 7K. Before 3K theres nooo power, yes I know its a 1.6 but still. Then the engine will lurch like crazy out of the blue around 3500 (sometimes) and all is well in higher revs. Ummm...what on earth is going on? tps, ecu, cam chain tensioner, egr valve????