Tonight I installed my rebuilt duraspark dizzy with the GM Hei module. It runs but especially at idle the motor has a bad stumble and stalls. When it stumbles and stalls the spark quits as far as a timing light is concerned. It doesnt matter what wire Im on even if Im on the coil wire. The tach does not seem to drop other than with the RPMs but its a analog meter so Im not sure how fast it can respond. My only thought so far is I didnt know there was a polarity to the pickup coil so Im not sure how I hooked it up. 50/50 chance I got it right. It did seem that I had to rotate the dizzy more clockwise than I expected to get it to run and show up on the timing scale. I just figured it was because the oil pump didnt line up right so I had to move it to get it to drop in. Do you guys think I could have the pickup wired out of phase? Would that make it fire between terminals? And thats why the spark seems to disapear? Except when I was turning the dizzy further clockwise it didnt seem to be backing through the carb. There does not seem to be much range in the timing because if I put a pump on the vac that makes it stall too, not sure what the timing light does because I dont have that many hands.
I have steady 14.2 volts to the coil and module.
Old points system was in poor condition but ran ok except at idle where it had a bit of a stumble but never stalled or seemd to have spark drop outs. Compression dry with warm engine 180,175,170,175,180,175.
Its 66 200 6 wC4 and autolite 1bbl stock as far as I know
New MSD blaster 2 coil.
New old stock 4 pin GM module I had in the garage.
Rebuilt single advance dizzy from oriley.
New autolite plugs gapped to 45.
New old stock relay I had to get key on power from the voltage regulator terminals.
Used Intel heat sink from local surplus store.
Misc 14 gauge wire, terminals, and 15 amp fuse.
New regular quality hei style wires.
New regular quality borg warner cap and rotor.
Ideas? Thoughts?
Thanks
TJ H
StPaul/Mpls MN USA
I have steady 14.2 volts to the coil and module.
Old points system was in poor condition but ran ok except at idle where it had a bit of a stumble but never stalled or seemd to have spark drop outs. Compression dry with warm engine 180,175,170,175,180,175.
Its 66 200 6 wC4 and autolite 1bbl stock as far as I know
New MSD blaster 2 coil.
New old stock 4 pin GM module I had in the garage.
Rebuilt single advance dizzy from oriley.
New autolite plugs gapped to 45.
New old stock relay I had to get key on power from the voltage regulator terminals.
Used Intel heat sink from local surplus store.
Misc 14 gauge wire, terminals, and 15 amp fuse.
New regular quality hei style wires.
New regular quality borg warner cap and rotor.
Ideas? Thoughts?
Thanks
TJ H
StPaul/Mpls MN USA