Originally Posted by nichols077
since i installed my new DUI distributor the engine wont shut off when i turn the key off. I have it on a relay exactly the way the instructions say. Anyone know whats wrong?
Since you didn't post the instructions or link to the instructions, we have NO IDEA how you have things wired.
If you didn't install a power relay to feed the HEI, then it's not putting out at it's full potential anyway.
That's probably a blessing, when they do put out at full coil potential, they usually just arc away inside the cap like crazy anyway...
Close your plug gap up to about 0.045" and you will avoid a TON of problems in the long run!
Originally Posted by PostaljeepSS
My first guess would be the relay is stuck. Try testing with a volt meter and see if it's putting voltage out with the key off. If it's not is the relay wired correctly? If both those check out see how long it runs with the key off as there may be some residual charge that isn't dissipating.
Nope, only about 1 chance out of 1,000 that he has a power relay in the circuit and if it's DUI's instructions, I know he doesn't have a relay in the circuit.
Chances are he's converted over to a Delco SI alternator and didn't tell us about it!
Run On with a Delco SI alternator is just another one of those 100 or so Problems with DUI and the other HEI clone makers don't tell you...
You will have to install a diode in your alternator wiring to get your distributor to shut off.
Once started charging, the alternator is back-feeding your ignition circuit.
There is an easy way to get it stopped and I'll post it when I find the pictures...
Diode, Radio Shack p/n 276-1144, small crimp connectors from Radio Shack also.
Plug/Pig Tail available at any of the auto parts stores.
This arrangement takes the place of the resistor wire, so you can just add the diode, or fully replace the resistor wire entirely like the picture shows.