thanks for your comments !
regarding the state of cut-out : power is completely missing for a second or two until it cuts back in and revs up to redline ! as stated , it is in upper range , power being absent from about 4500 to 5500 ! again , only in 1st gear !
and the most frustrating fact of all is NOT ON EVERY DRIVE ! only certain days ?
i never run the car low on gas so that can be eliminated .
HOW MUCH LABOUR is it for mechanic to inspect fuel filter screen suggested in last post ?
i will also have plug gaps checked at next service visit !