hi i wondered if any 1 got any ideas ive got a zr 160 & through 2nd 3rd 4th & 5th gears when i accelerate the engine seems to hesitate then when i ease off the pedal then press it again it pulls ok its only started doin this in the last few weeks any 1 got a solution??? also when i start car up in morning all seems ok then revs go down engine seems to want to cut out then all of a sudden it picks up all seems fine then???