Impersonating a mechanic
Join Date: Mar 2010
Location: Kennett Square, PA/Sun Valley, ID
Year: 1982 & 1985
Model: 82 GL1100-I PA/85 GL1200-A ID
82-1100 Interstate Missing?
Just started up the 82-1100 after its long winter's nap and went for a 40 mile ride. At idle, when warm, there is an occasional loud knock that sounds like a cylinder is missing. Could be an almost-plugged slow speed jet, I suppose, so I'll put Seafoam in the tank when I gas it up tomorrow.
Question: When I got back, just for grins, I checked the plugs. When I removed the #1 or #2 plug, the engine stumbled but continued running (rough). However, when I remove either the #3 or #4 plug, the engine quits. Could this be an indication that I have weak coil or cable?
Also: The left side plugs were Autolite 4163 plugs and the right side were NGK DPR8EA-9. I'll replace them all with new DPR8's tomorrow, but could that have caused the knocking?
82 GL1100-I -- PA
85 GL1200-A -- ID