Wednesday, September 15th, 2021 AT 3:29 AM
Car runs great cold and idles smoothly until it warms up and then develops a slight hesitation on acceleration and idle starts to surge from low to high and so on. When cold again idle is steady and smooth. Have replaced EGR valve and cat, Cleaned intake, replaced fuel pump, fuel filter, injectors, fuel regulator, new plugs, distributor coil cap rotor, new ignition wires, new ECT sensor, MAP sensor, thermostat. Cleaned throttle body checked all hoses for leaks and replaced air filter. Checked timing belt, new O2 sensors upstream and down stream, checked all fuses and relays, flushed coolant system and replaced radiator. I did a test on the TPS sensor and it seemed to check out but I really don't know how to tell its set right. I'm an old school mechanic and didn't have all these things on the old cars.