[Tomsriv]

If the problem is inconsistant wait until it starts running good and then disconnect the knock sensor. If it starts running bad then you found the problem.

I had a similar problem on my 86 Volvo 740 Turbo. I ran 87 octane in it for several months and finally the knock sensor broke. It had no power below 4500rpm because the timing was so retarded. It was an intermittant problem. They didn't have check codes back then so I had to throw the diagnostic book out the window and just unplug stuff until I could duplicate the problem.

What octane fuel are you running? What does the owners manual recommend? I am planning on getting a 4cyl 4runner so I would like to know if the manual asks for more than 87 octane.