Next issue:
- Car is difficult to start after a long trip.
Again a couple of people have this issue, but no direct resolution has been found. Issue has been present since I got the car, do rebuild did not fix it. Only occurs after a good hour or more of high-way driving. a 30min drive (engine is fully up to heat) does not occur. One time after driving for 4 hours (I actually try to avoid turning car off), I stopped car, and opened bonnet and shock the car to see the fuel window on the carb. after 30sec, the carb started to empty (I'd shake the car), until after a minute the window was empty. The car was hard to start, hence the actually issue is the carb is loosing fuel when stopped, so when you start it, it takes some time for the fuel pump to refill, and start.
So I orginally though i was loosing fuel because boiling off, but I put a temp sensor on the carb, and its not getting hot! in fact after driving the carb is still ok to touch it (where the rest of the block etc is too hot). I also researched 'vapour' lock but I dont have any suction build up in the fuel tank. i also researched what could suck fuel out of the carb, but does not seem to be a way? Also not the above thead on other symptoms!
Tried:
- Fuel Cap Off: did not seem to work, but didnt really try it for long.
- Carb Temp: DONE, does not seem to be an issue.
- Swap Carbon Canister pipes? Unsure what pipes to swap?
- install canister the right-way up.
- New fuel pump? Is fuel being sucked back from fuel-tank?
- Vac pipes, fitted wrong? dont think so, but the ones going to all those vac switches could be wrong?
- Vac pipes sucking fuel? removed all piped leaving carb, and sucked on them. none of them get fuel?
- Air return canister replace?
Update 3rd Sept: Have'nt really replaced anything on the above list, BUT have done lots of things on the above list for stuttering. had a long drive a few days ago, and issue did not occur? maybe its fixed, need to test some more.
Update 15th Sept. Still seems to be happening, when on drive today. The car starting its stuttering and then when I stopped it was difficult to start again. I did'nt get out to look at the float window. A few things being done on the stuttering isssue. I also notices that I mounted one of the carbon canisters (Fuel return one) upside down. I'll try to rectify?
Update: 3rd Oct. Put both canisters right way up. Not sure what these do, as you can blow/suck on each of the pipes, so its not blocked at all. Strangely, sucking on one of the piped creates a sound much like a harmonica coming from the unit. Anyway, I dont think this issue has re-occured, but I need to go on a much longer steady drive to be sure.
Oct 14: Good run and issue re-occured after a 1hr long drive, pulled up for Coffee and was difficult to start, but only once. I'm going to focus on this being a Fuel VAC issue (hence breathers etc may be blocked), but I suspect (as removing fuel cap has no suction sounds), that it only lasts 30secs, hence If I drive and let car idle for a minute, it might let the Vac go and not be an issue, but if I turn car off immediately, the vacuum lasts long enough to suck fuel out of the carby bulb. I'll test for a while and see.
Dec 28th. Some more drives issue is still present. A few days ago on a 40deg day, even after a short drive it happened, so Its definately heat releated. had a look at the 'valve' on the breather contraption return pipe. It was not operating (could blow through it both ways). replaces it, but still had issue. Today I found a pipe from the Carb to the valve (then to the return pipe to tank) had a rather large crack in it, which I did'nt see before. Replaced it, so I'll see what it does.
PS: STarted anothe thread on this to focus the answer. Refer too:
3F Carb Draining issue - https://forum.ih8mud.com/threads/3f-carb-draining-issue.1329173/#post-15294932
If you search for 'Carb Draining' or. fj62 Oklahoma rebuild. you find lots of other threads on this issue, with no one really saying they found the answer. However the 'issue' can present as ' Drains randomly, Drains overnight, Drains fast' with possibly different answers.