So this seems to be a common issue. I've read about 10 different posts on it, and affects 2F's as well. It seems some great idea's from Okie rebuild, to replacing seals, or doubling up on seals or polishing bits. BUT I cant find a single thread that end's in "Well that fixed it!"
Issue, Carb drains when its HOT after driving. It drains before your eyes in about 1min. The fuel I believe is ending up inside the Carb. Cant find any leaks, and when I look inside the Carb after it drains I can see the fuel on top of the flaps. Does not do it when cold, and it if it does not drain (which sometimes it does not) the fuel stays in the sight glass for days). I dont think this is a 'leak'' but instead is a siphon when certain things line up. I've got a video coming up showing (after 10mins and glass is empty) the fuel in the secondary (I already opened the throttle a bit. which likely emptied the main), I shake the car and open throttle again you can see 'mist''. Another vid shows fuel poring into secondary chamber straight after I turned the engine off.
The best detail seems to be from PinHead Carb bowl draining overnight - https://forum.ih8mud.com/threads/carb-bowl-draining-overnight.210532/ . But I cant find these holes he mentions to uinplug/clean up. I've tried the Okie rebuild and that did not help. I also bought myself a $100 carb on ebay just to learn how it works. The FJ62 has had a full rebuild except for core engine,carb. all hoses are new, PCV, Fuel filter, but Charcoal canisters and fuel pump are original) Engine actually runs well, but I think its uses fuel and I get the occasional hickup on a slow hill around 1800RPM, but I think thats a vac advance issue)
Some thoughts I had:
1. Siphon into the Carb idea. I would have thought that the aircleaner would not allow a 'suction' to draw fuel into the carb. Also, the problem happens with air-cleaner off. so its not sucking.
2. Capillary action. Likely not to drain it in under 60 sec
3. Pressure in Fuel tank. Their is none, and the return is above the fuel
Is it possible something is 'pushing' air into the float chamber thus pushing fuel out? Maybe next time I see it, I'll start pulling rubber hoses seeing I have 60second while it happens! (I did run the car twice attempting to reproduce it, but it wouldn't. Shows how it needs a specific set of circumstances). Or is a certain position of 'valves' creating an environment under the flaps? In the first video you can see the 'mist'pushing up from the body?
Has anyone who has seen this issue got a solid picture of what they fixed?
Issue, Carb drains when its HOT after driving. It drains before your eyes in about 1min. The fuel I believe is ending up inside the Carb. Cant find any leaks, and when I look inside the Carb after it drains I can see the fuel on top of the flaps. Does not do it when cold, and it if it does not drain (which sometimes it does not) the fuel stays in the sight glass for days). I dont think this is a 'leak'' but instead is a siphon when certain things line up. I've got a video coming up showing (after 10mins and glass is empty) the fuel in the secondary (I already opened the throttle a bit. which likely emptied the main), I shake the car and open throttle again you can see 'mist''. Another vid shows fuel poring into secondary chamber straight after I turned the engine off.
The best detail seems to be from PinHead Carb bowl draining overnight - https://forum.ih8mud.com/threads/carb-bowl-draining-overnight.210532/ . But I cant find these holes he mentions to uinplug/clean up. I've tried the Okie rebuild and that did not help. I also bought myself a $100 carb on ebay just to learn how it works. The FJ62 has had a full rebuild except for core engine,carb. all hoses are new, PCV, Fuel filter, but Charcoal canisters and fuel pump are original) Engine actually runs well, but I think its uses fuel and I get the occasional hickup on a slow hill around 1800RPM, but I think thats a vac advance issue)
Some thoughts I had:
1. Siphon into the Carb idea. I would have thought that the aircleaner would not allow a 'suction' to draw fuel into the carb. Also, the problem happens with air-cleaner off. so its not sucking.
2. Capillary action. Likely not to drain it in under 60 sec
3. Pressure in Fuel tank. Their is none, and the return is above the fuel
Is it possible something is 'pushing' air into the float chamber thus pushing fuel out? Maybe next time I see it, I'll start pulling rubber hoses seeing I have 60second while it happens! (I did run the car twice attempting to reproduce it, but it wouldn't. Shows how it needs a specific set of circumstances). Or is a certain position of 'valves' creating an environment under the flaps? In the first video you can see the 'mist'pushing up from the body?
Has anyone who has seen this issue got a solid picture of what they fixed?