195sRFast Posted July 28, 2011 Report Share Posted July 28, 2011 My 1970 Datsun pickup wasn't running so I put in a new engine in with a matchbox dizzy. Now the truck will start when and run but only if you hold the key in the on position. When you let go of the key the engine turns off. Any ideas? Quote Link to comment
wayno Posted July 28, 2011 Report Share Posted July 28, 2011 Are you saying that you have to keep the starter engaged for it to run? Quote Link to comment
banzai510(hainz) Posted July 28, 2011 Report Share Posted July 28, 2011 simple fix. show us your wiring. the 521 will have 2wires butted together that goes to the +side of coil. Blk red I believe on my 72. You should get 12volt swhen key is ON. and 12volts when key in Start. To ck this remove the starter wire. remove the wire at the coil. than ck for voltages. hopefully you wired the matchbox correctly. If not using a ballast resisitor you need a EI coil. points use a ballast resisitor and a 1.6 ohm coil. so use the correct stuff most 521s the fuse box needs a cleaning or rplacement fuses. Quote Link to comment
datzenmike Posted July 28, 2011 Report Share Posted July 28, 2011 If you are running a ballast resistor it is broken or not connected up properly. Quote Link to comment
195sRFast Posted July 28, 2011 Author Report Share Posted July 28, 2011 If you are running a ballast resistor it is broken or not connected up properly. It was the ballast resistor the black/red wire running from the coil to the resistor wasn't hooked up. The plastic sleeve that covers the connector made it seem like it was pushed on all the way but the connector wasn't touching the resistor at all. Now runs fine except a whine coming from the Weber carburetor. thanks for the help. SM Quote Link to comment
izzo Posted July 28, 2011 Report Share Posted July 28, 2011 vacuum leak maybe? Carb shouldn't whine lol Quote Link to comment
banzai510(hainz) Posted July 28, 2011 Report Share Posted July 28, 2011 whine coming from the Weber carburetor????????? choke still on? is the plate still closed? Quote Link to comment
195sRFast Posted July 29, 2011 Author Report Share Posted July 29, 2011 whine coming from the Weber carburetor????????? choke still on? is the plate still closed? No the plate is not closed. The carb looks like it might be missing some pieces but I don't know what pieces are missing, since I have only used the stock Hitachi. Will try to post pics tomorrow. Quote Link to comment
ggzilla Posted July 29, 2011 Report Share Posted July 29, 2011 Put a real aircleaner on it, it will be quiet. Quote Link to comment
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