Fuel pump: Quiz #1

[lovetoski]

Just took a looky at my carb, hope this helps...

I do not have anything connected where your "return" line is bolted up to your carb. Nothing, nada. I can feel the round hold where a bolt could go (as on yours), but can't tell if it's threaded, nor if there is a plug deep inside.

Your return line appears to be bolted to the carb with a banjo bolt. These allow fluid to go through them. It's possible that excess fuel from the pump is being dumped into the carb.

If it were me, I'd connect the return line where it goes, and do whatever it takes to cap off the hold in the carb where the return line is now bolted.

Also, make sure the return line is clear all the way back to the tank. I'd guess that just blowing into it would be enough to confirm it's OK. (Compressed air is much safer than blowing by mouth.)

 

[60wag]

I'm not positive but I think that's a non US carb. There are definitely some hose nipples on the front missing - like the high altitude air bleeds. What altitude are you at anyhow? I'd seek a professional opinion - like Jim C.

 

[phantom60]

doug- thanks for checking......

60wag- ahh, that's not good......
i'm only a couple hundred feet above sea level.
i was getting ready to order a rebuild kit for the carb, if this carb is (for some reason) not US, do i need to find a special rebuild kit or is it the same kit for all Aisin carbs?

 

[beaufort-fj60]

to cloud the issue some. this is for smogged and non-smogged out of parts micro. but i also have a 2f (not scanned) fsm that shows a version of non-smogged with a return line. The fsm is for 2f in 78 and below fj40. i am not a fj40 expert but from the fsm i would guess the fj40 might use the return in its setup. maybe you PO tried to set up the carb using a 40 as a reference.


my 84 fj60 is same as pic, one line.

 

[phantom60]

yeah, that's weird........
that shows only one line running up to the carb, mine definately has two. WTF?
hhmmm......
does someone have a picture of their carb handy that they can throw up here? after lovetoskis and 60wags comment i'd be interested in seeing how everyone elses is set up.
thanks.