Nissan Repair: 87 300zx losing power, throttle switch, sensor head

Question
Hi,
I've replaced the plugs, cap, rotor, fuel pump, fuel filter, alternator, battery, sensor head tmp, egi sub harness, throttle switch, and sw valve throttle.  I've checked under the  plate in the ditributor for oil.  I had (oops)too much oil in the car and drained the excess.  But, I'm still having a problem with the car losing power after driving for 10 minutes.  What do I do next?  Thanks in advance.


Answer
Jesse,

If the converter is melting or plugging up it can cause what you describe.

Second, is the possibility of the car heat soaking.  If the temperature is high it can cause the car to run hot enough to cause vapor lock.  You can check the fuel pressure with a gauge and then tape it to the windshield and drive until the car does it and if the pressure is good check the converter.