Y61 Fuel tank breather

[BLUEDOTSPEEDWAY]

G'Day, I have a 2000 model wagon and have been having problems with air getting into lines and causing a miss in the engine, after changing hoses and filters etc I left the fuel cap loose and drove the vehicle. No air No miss, me thinks it may be the breather on the tank. Before I start pulling seats out, can anyone tell me where the breather may be. Thanks

[PeeBee]

From my understanding of a fuel tank breather, it only allows air to enter the tank above the fuel line, replacing the fuel volume that is used. I can't see how this apparent blockage' would affect the fuel delivery system. At least thats how mine works.

[Fireblade]

i agree with peebee, could it be possible that the breather is blocked and thats causing the tank to create a vacuum and the engine can suck the fuel?
ill tell a stock of something similar i had,
on my motor bike i had rust in the tank so i used a rust repair kit consiting of different cleaners and followed but a resin that coats the inside of the tank.
once i was done the tank was like new and i rode is short distances to work and all was great but on longer trips that used more fuel it started to die out and splutter.
i though spark? no fuel? more rust.. oh no.
eventually i tried opening the fuel cap like you and then i could ride forever with and open cap. turned out the resin i rolled around in the tank to seam it plugged up the breather.
easy fix go an old bicycle brake cable or a bonnet cable will work and flossed the breather pipe.
after all this i never had an issue.

you said you took the cap off and it good but no good with the cap on i would locate the breather and maybe run a new line or remove it at the tank and see if it runs well if so you have found the problem

hope that helps.

[MudRunnerTD]

The breather is in the rear drivers side wheel well. behind teh back wheel is an inner guard plastic that protects the fuel filler and the breather is there too.

[PeeBee]

My brother's hilux suffered poor running with a blocked tank vent - it wasn't drawing air into the injection system, more pulling a vacuum on the tank and making it super hard for the fuel to be drawn to the engine. A mud plug was found in the tank breather line. Its more likely to be a blockage at the breather end, as its dusty and that sticks to the diesel residue.

[the evil twin]

Totally agree ^^^^

Blocked tank breather is pretty much the first (and easiest) thing to rule out.
Not uncommon and can cause all sorts of weird symptoms.

[VK2FMIA]

Used to plug the breather on mates dirtbike for sh!ts & giggles. Took him ages to work out what was wrong. If it wasn`t that, a wet Tally-Ho under the spark plug cap had him swearing like a trooper.

[MB]

Dad’s favourite trick was the old Tally-Ho Suzuki spitball too mate. He’d time the saliva to perfection for a 5km dry out caput! A sibling was too lazy to push home one day and when Dad returned, fessed up, then together returned to the hiden bike, whoops it was stolen/gone bye bye [emoji51]


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[BLUEDOTSPEEDWAY]

Thanks champion that's the info I was after, You may have saved me 5 hours work, that I don't have time for.