Just got my ZT up and running (been sorned since last year) and it seems to have developed a strange problem where when I have the accelerator pedal just (and I mean only just) from the off (foot off) position the engine seems to cycle as if fueling is being cut off and on. If I press the pedal a little it is fine and the car runs well, no starting issues and the EGR (Exhaust Gas Recirculation Valve) has been bypassed by previous owner. Any ideas? Jim