Can some one help me please!? Over a period of a couple of months my car began to lose power to the stage where it was undrivable. I replaced fuel filter and pressure regulator but no improvement. I took it to so-called experts, who replaced warm-up regulator with reconditioned unit. Some improvement but not back to normal. After a few days it's undrivable again. Engine starts cold easily but will not rev past 2000 unless air filter is removed and hand pressure applied to sensor plate while throttle is opened. Fuel system is K-Jetronic.