ok guys thx for the help ahead of time.. ok i have an 1990 fc S/5 we swapped an 88 s/4 turbo motor in it. N332 ecu.... the car started giving me problems after i fixed the manifold to turbo gsk (started over boosting 15psi stock turbo) found out that my friend kicked my injector ground loose... fixed it... now down to my issue i start it. it runs fine. warms up to normal temp jumps into some kind of limp mode ruff idle and wont keep idle only if i hold the throttle open runs like crap sounds like one rotor.... lmk if you guys ever experienced this befor thx

 

Check the Water Thermosensor. Which injector plug was kicked? Was it one of the primary injectors? If so then re-examine this connection.

 

ill check to see which one was kicked loose.... and re crimp it... ill also check to see it the thermo sensor is ok and connected today..

 

Water Thermosensor is found at pin 2I (Green/White wire) of the ECU. W/key to on it will read 2 to 3 volts on a cold engine and as the engine heats up the voltage value slowly drops to .4 volts. If one of the primarie clips was damaged then you could basically tell at the ECU if the plug is making a solid connection. Pins 3E (Light Green) and 3C (Light Green/Black) should both register 12 volts w/key to on. And why was your friend walking on your engine? And check for vacuum leaks in the area in which you worked on.

 

ok yah i re crimped all of it and hooked up the water thermo sensor, green matching the sensor Orange ribbon that slipts the injetors apart... ok so i did run fine and idle for a while even when it was hot.... IN-TILL i revved it up it started doing it (stumbing and let go wont hold idle.....( and besides all that satch might i add that my turbo is messed up and shooting oil into the cold side... looking for a replacment by the way.... ill check the voltage on the wire asap thx..

 

Found my issue my injector plug crimp came loose on the rear primary injector re solders all of them now running thanks for the help guys