Originally Posted by dakotawelch21

After swapping a 1jz into my 240sx I've had issues with the motor. Compression tested fine with all cylinders around 155. Once I start it the engine will run good until it is switched over to open loop the car runs bad. When trying to rev it up there is sudden jolts of power and is not smooth at all. The idle seems a little higher and has many hiccups in it. I've already changed O2, MAP, Crank position, cam position, and throttle position sensor. None of those sensors have changed anything. Yes I did set my TPS when installing it.

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