87 Maxima lack of power

I have a 87 Maxima with 239k miles and has no power when you start off. When you get above 35-40 it seems to be fine. Also when you first start the car and are driving it it drvies great, but once it gets warmed up it seems to start this issue. Anyone have any ideas what can cause this? Plugs, wires cap and rotor button changed in the past 6 months. Timing Belt and water pump changed in the past 6 months.

I have a 87 Maxima with 239k miles and has no power when you start off. When you get above 35-40 it seems to be fine. Also when you first start the car and are driving it it drvies great, but once it gets warmed up it seems to start this issue. Anyone have any ideas what can cause this? Plugs, wires cap and rotor button changed in the past 6 months. Timing Belt and water pump changed in the past 6 months.

O2 comes into play only after warmup. Test by disconnecting O2 sensor connector. If this helps, try self diagnostics. Its relatively cheap/easy to swap.
I guess the connector is on the firewall (down there). The connector is about one foot out from the sensor.
Check http://www.cardomain.com/ride/748507/9

Another issue is KS sensor. When dead, ign is retarded = pwr loss. I have bypassed it with a 5c resistor...

Tell us how it goes.