my 1978 280Z 5spd shudders and shakes between 1300 and 1800 rpms wether revving up or down. it also uses a half tank of fuel in less than 50 miles. the plugs are wet and black. theres no fuel canister, the egr is unhooked, the dashpot has no vacc. line attached, and when ever I pump the brakes the car revs up is that normal? the afm serial is a-31 618 420 is this the right one? newer plugs wires and I cleaned alot of connections but to no avail. it also revs up and down at idle and when I press the brakes it almost dies heres some pics of my engine, what would cause the shudder and other problems? im heading to parts store now to get a fuel pressure tester and more contact cleaner. other than the gas gulping and shuddering this thing idles high but it goes fast. thanx
oh, 1978 280Z non turbo efi 5spd