3F Carbi Stalling when rock climbing

[Toyo80]

Well the stalling issue with the 3f happened again on the weekend, This only happens when crawling up hills or rocks & not when the truck is at speed.

Just hope there is some sort of fix & if others have had similar problems.

[hulsty]

I have the same problem, steep long inclines and side slopes, I THINK my problem is due to the elec fuel pump not being able to suck from the tank and letting the carby run dry.

I'm one day going to add a small ~1L header tank with another fuel pump and a proper regulator off that to my carby.

[DIRTY ROCK STAR]

it sounds like its just because its a carby.
alot of carby motors have this problem.
which is why most rock crawling folk have efi or lpg.

a surge tank might help. if you search on here im pretty confident there will be a wealth of info.

[lokka]

Yep DRS is sorta right the problem is the float level in the carb it self may be a tad low mine has similar probs its a carby thing maby raising the float level a tad may fix it tho ya run the risk of pumping fuel out the vent which could lead to more probs i havent played with mine to sort it yet so cant realy give a soloution to fixing it yet ..

[Thommo 73]

when i got my 3f powered middy it would do it up hills and it was the float level set too low.
you may as well put a rebuild kit thru the carby while your at it or better yet EFI

[hulsty]

Is it hard to put a kit through the carby? When setting the float level what is the consequence of setting it higher?

[Thommo 73]

i would say no to putting a kit thru. just make sure you remeber/make where every thing goes. but it's mainly gaskets/o'rings and seals.
the acc plunnger made the most differnce on mine.

and if you set the fuel bowl level too high it could run rich or flood, it can be a pain in the..... to get prefect but it made a huge diffrence going up hills

[Toyo80]

[quote="Thommo 73"]i would say no to putting a kit thru. just make sure you remeber/make where every thing goes. but it's mainly gaskets/o'rings and seals.
the acc plunnger made the most differnce on mine.

What is the acc plunger & what was done?

[Thommo 73]

acc = accelerater plunger, they have a seal around the bottom with a spring in it that gets old,cracked and crappy.

[Toyo80]

acc = accelerater plunger, they have a seal around the bottom with a spring in it that gets old,cracked and crappy.

Might have to grab hold of a service manual me thinks & suss it out.

Did the problem go away all together once you did this? Like i said i only have had the problem crawling up rocks.

Thanks.

[sierrajim]

acc = accelerater plunger, they have a seal around the bottom with a spring in it that gets old,cracked and crappy.

Mine is currently suffering from the same issue. Runs perfectly on gas, on petrol it will run but starves a little until the engine is under enough vaccum to suck the fuel through.

carby kits aren't too expensive from memory, its just the time to get it done.

[Thommo 73]

yes it did solve the problems. float level for hill climbs/steep stuff and carby kit to fix flat spots and minor backfires. but if you are going to do the float level you may as well put a kit thru the carby. they are cheap and you wont regret it.
and as serriajim said not running a carby motor on petrol now and then it will dry the accelerater pump seal out,

[Toyo80]

Rehatch this older topic for more ideas.

After the latest venture of the weekend I did pick up on something, when climbing the engine revs drop & then it dies upon restarting a heap of black smoke appears out of the exhuast which would tell me that the carb is not running out of fuel but infact flooding?

Any thoughts on this would be ideal.

[dow50r]

yep...the joys of carbis...the float is up front, and it will be pouring fuel into the motor going up...but thats better than doing it going down hills...lol...broom broom,

[Toyo80]

I'm thinking of reducing the float height a tad, at the moment the fuel is sitting 3/4 of the way up in the fuel window at idle. Any ideas or thoughts on this would be ideal.