Ok, i parked my car a couple weeks ago (running great at this time) and went out to start it up today, and it wouldn't stay running. Heres the problem:

When i turn the key all the way to engage starter and fuel pump, the car cranks and starts right up, but when i let go of the key, it loses power to the gauges/fuel pump/ignition/blah blah. I can hold the key in a sweet spot by starting it, then easing back on the key just a bit and it will run fine (other than me having to hold the key).

Do you guys think it's the key switch, or something simple like a loose wire? I converted it to carb about 4-5 months ago, and haven't had any problems till now. Anyone else had this problem?

 

sounds like a bad key cylinder

theres linkage on the end of it that is supposed to keep it engaged sounds like its not sticking

try taking it out