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Posted by: Trent914 Dec 10 2006, 08:05 PM

Help! I've got a '74 2.0 with FI that has an electrical problem I can't figure out. The "blue" 25-amp fuse on the relay board keeps going out. I disconnected the fuel pump and checked it, it runs fine.

The car blows the fuse after 20- 30 minutes, shorter in "warmer" weather, a bit longer in cooler weather. Anyone out there have any ideas?

Thanks

Posted by: 904svo Dec 10 2006, 09:00 PM

Check the wires from the control panel to the pump, sounds like there
is a short at times. the insulation may be fraded on the wires.

Posted by: brp914 Dec 10 2006, 09:09 PM

it could be your aar. try unplugging it, although it could be hard to start from cold.

Posted by: ejm Dec 10 2006, 09:20 PM

The auxiliary air regulator is powered off the same circuit. Check the wiring and valve.

power closes the valve ....it should start the same but may idle low/stall when cold if the valve is stuck closed..... if it's stuck open or has a bad heater you'll have high idle when warm

Posted by: Trent914 Dec 11 2006, 10:29 AM

Thanks for the thoughts, I'll re-check the wires and try disconnecting the aar.
Will let you know.