I bought a 91 240 a while ago and I got a problem i cant fix. After 5500 Rpms My car cuts out, the rpms rise but theres no real speed increase. I have a friend with a s14 and a friend with a s13 coop they were both the same upgrade and moters as mine but they pull really hard on me. Also my idle bounces alittle from 500 to 1000 not hard tho. I have tryed cleaning injectors with the gas treatment shit no luck, i put new wires on plugs and still no luck.It also hesitates alittle when i step on gas. the motor runs fine has 143,000 on it. I have also changed fuel filter too. i have good air filter too. ANY IDEAS AT ALL NEED HELP ! could it be vac hoses?I forgot i also pop a flame when i change gears at 5000 and up.




fellow 240sx owner.