Hello, the Escort from my brother is having problems, he starts to buck as soon as he is warm when he accelerates, in the empty run he behaves calmly. when I turn it off for a short time and start again it is good for a few minutes. Candles, cables, ignition coil, fuel filter, Lambda probe, coolant temperature sensor changed. Have measured the Lmm and the throttle valve pot and also checked for function, are fine. Now I need your advice on what could it be? ch already in advance