dieselmandustin
Member
Just helped a buddy put a motor in his truck. He did the Windows mod on his old motor got this motor from a wrecked truck. Everything on the motor checks out fine compression wise. It starts right up no problem and idles smooth for a few seconds then the idle starts to oscillate up and down till just quits. Starts right back up and same issue. Any ideas what could cause this? All sensors are off the original motor and it didn't have this issue. Kinda stumped.