No Power Captain!, 74 914 2L runs for 10 minutes then dies ????? Options

[thompson-mfr]

Ok, I have been fighting some electrical gremlins.

74 2.0L FI 037 brain (now with 270 ohm ballast resistor)

The car runs great for 10-15 minutes then dies.

I tested the power relay and fuel pump relay and fuel pump itself and have power to all.

After it cools off for 3-5 minutes it will start again.

I have not checked for spark, but am guessing when it dies this is what is stopping.

What could this be??? ECU / Brain / Computer? I know they rarely fail

When I unplug my air intake sensor it has no affect on running. I thought maybe another sign of potentially a bad ecu / brain / computer. I have read it is supposed to richen the mixture.


Here is a pic of my car just because I like threads with pictures.

[Rockaria]

When I rebuilt my 73 2.0FI I had the same exact problem. After getting everything as perfect as I could. It still died after 10 minutes. I messed with everything, focusing on the Temp Sensor II. But everything always checked out as fine.

With nothing left to fix, I thought, I finally went and rented (It was free, but needed a deposit) a fuel injector noid light from Auto Zone. It showed that power to the injectors was random after it warmed up. Sometimes it went on then not for a while then on again. I thought it could be the harness, but that tested okay.

So I took out the distributor and cleaned and checked the whole thing. The trigger points were really dirty, out of position and not working correctly when I tested them. After I got it set up perfectly, cleaned the trigger points, got them set just right, and put everything back together. The car ran perfectly and has for the past year.