my 91 honda accord w/ an f20a jdm motor has been cutting out or just no poer like its starving for gas but if i punch it to the floor it kicks in like nothing is wrong ive changed capp rotor plugs wires head gasket and valve cover within the last two weeks and my alternator is new also changed fuel filter also the air filter nothing seems to help and this is do random that it will do it sometimes and not at all for a couples days. does anybody have any suggestions. no engine codes also. pls anything before i sell my ride im at my wits end. also had my shop run through grounds no lose grounds