Fuel shut off solenoid problem

[rbackus]

Had my '76 Spider in the shop with my local mechanic recently for a couple of things. He noticed a problem with it dielseling and found that the fuel shut off solenoid wasn't functioning. He put in a new one (10 mm) and while that fixed the dieseling, it wasn't getting enough fuel and would run rough or not at all so he put the old one back in.

Any suggestions on the cause and cure?

Thanks,

Randy Backus

[manoa matt]

The test for checking the solenoid is to remove the wire from it. Put the key in the ignition and turn the electric on but do not start the car. Touch the wire to the male spade terminal on the soenoid. Every time you touch the wire you should hear a click.

The idle shut off solenoid houses the idle jet. Its the tiny brass nipple at the end. Make sure the old and new solenoid have the same jet size. The jet size is stamped into the brass jet on the side. Should say 50 or 55. You can switch the jets between the solenoids.

Make sure the jet is not clogged, its a tiny hole and can clog easily. The solenoid gets power through the wire and grounds through the carb. If you test the new solenoid and it does not click it may not be properly grounded.

[rbackus]

Matt,

Thanks for the advice. We've tested the new and old solenoid using the same method you suggested. The old one does not click and the new ones does so we're sure the old one is bad and the new one is good.

The new one doesn't seem to be delivering enough fuel though.

Randy Backus

[So Cal Mark]

the low speed jet goes on the end of the solenoid, your new one may have the wrong jet on it