I have already researched a ton of threads about this and haven’t found a for sure solution.
89 240sx with a KA24e single cam.
Parts that are new:
Injectors,fuel pump,fuel filter,plugs,wires,distributor,ignition coil,IACV,CTS,MAF SENSOR and sub harness with new ground,02 sensor,cat converter,TPS,oil pump,timing chain,head gasket,water pump,thermostat,alternator.
Literally any part that could be replaced is new. The only thing I haven’t replaced is the FPR. TIMING is 100% correct at 15 degrees BTDC. Runs and drives but has a stumble misfire at idle and acceleration. Loss in power. Seems to go away the higher the RPM but is still present. Compression test all cylinders at 150. All vacuum lines are connected. No codes on ECU.
Any info would be helpful.