RootesRooter
Donation Time
I took my SV w/standard Weber carb out for its first spin in several months. It ran perfectly at first. Smooth. Good power. A mile from the house, just starting to warm up, I headed down a fairly steep windy road. As I approached the bottom of the hill and let off the gas I noticed the rpms were staying very high, about 4000. I pulled off, turned it off and checked the linkage. No apparent binding.
I restarted and almost immediately felt the engine running on what felt like three cylinders, but no more excess rpms. I limped it back up the hill. I had to keep in a lower gear than normal, as it would make a strong but irregular ping below 3000. But at higher rpms 4000+ it would occasionally backfire.
When I got it home I checked the plugs. All clean. Dizzy not loose. Cap looked good. Replaced the rotor after the old one broke while prying it loose to inspect it. It feels like the dizzy springs are moving normally. But no change in how it ran.
Strong oil pressure-no change. No internal rattles before or after. Intake gasket is new. Intake bolts tight.
I didn't think my set-it-and-forget-it Weber could be subject to catastrophic failure, but I'm running out of ideas.
I still have to check the points. In the past, closed points would cause weak or no spark, but never irregular like this. Similarly, a bad condenser would either be off or briefly back on, never in between.
Any suggestions?
I restarted and almost immediately felt the engine running on what felt like three cylinders, but no more excess rpms. I limped it back up the hill. I had to keep in a lower gear than normal, as it would make a strong but irregular ping below 3000. But at higher rpms 4000+ it would occasionally backfire.
When I got it home I checked the plugs. All clean. Dizzy not loose. Cap looked good. Replaced the rotor after the old one broke while prying it loose to inspect it. It feels like the dizzy springs are moving normally. But no change in how it ran.
Strong oil pressure-no change. No internal rattles before or after. Intake gasket is new. Intake bolts tight.
I didn't think my set-it-and-forget-it Weber could be subject to catastrophic failure, but I'm running out of ideas.
I still have to check the points. In the past, closed points would cause weak or no spark, but never irregular like this. Similarly, a bad condenser would either be off or briefly back on, never in between.
Any suggestions?