i have a 350 tpi and when the motor gets hot it runs bad, ive had every test done on it and all the sensors are ok and the fuel system is good and so is the ignition system. so i think i have an intake manifold gasket leak. ive come to this conclusion because when metal heats up it expands so when the car starts up for the first time it runs perfect because the engine is cold and the gasket is sealed. but when the motor get warm the metals expand creating a gap in the intake manifold gasket. if this is true how would the car run with a bad intake manifold gasket? would the car run choppy and sometime stall, also have no power when accelerating?