Fuel dumping

[455bird]

[Boostinjdm]

did you build your own tanks?

[455bird]

No I got this one free, it was too small for the last car I helped build and he owe me so he gave me this and some more junk. This little car was built out of spare parts and some old tubing I had lying around

[Boostinjdm]

there is a few things that will cause fuel to run out the carbs.

#1 Too much fuel pressure. check with gauge and compare to factory specs
#2 Worn needle and/seat.  replace
#3 bad floats.remove from carbs and throw them in a can of gas, let sit.  if they sink they are bad.  or just replace to be sure
#4 incorrect angle on the carbs. the gasket where the bowl attaches to the carb body needs to be as close to level as possible, I think up to 10 degrees is allowable, but not sure on that
#5 shit getting in between the needle and seat.  I built my own tank and had metal dust getting in there, dirt will do the same

One of these is your problem, have fun.

[Boostinjdm]

one more.  some carbs have a screw at the bottom of the bowl called a pet cock used to drain them.  sometimes they have an o-ring seal that can go bad.

[SPEC]

That was a good post Boost,
covered pretty much all the bases

[455bird]

[fabr]

You can't just look at a needle and seat to see if it's good usually. Replace them and your problem is likely fixed.

[fabr]

And put a filter between the tank and carb/s.

[Admin]

Im going with fuel pressure on this one...

[Punkur67]

Also make shure your fuel tank is vented. We ran into this issue on my dads car and the "vented" fuel cap was not working very well. The fuel tank was building pressure and pushing past the needle and seat. It could be this but soulnd like you need a regulator. Unless you run the pump made for the motor there is no telling what pressure you are running in to your carbs. Does the motor have a reg built in to the fuel feed line?

[fabr]

It could be a vent problem that translated to a pressure problem. Was the  engine originally gravity fed fuel or pumped?

[hirevlimit]

Have ( you ) ever had this engine running correctly without fuel overflow or has it always had this problem.
The reason I ask this question is because years ago I traded for a 1981 gs-1100 that a friend of mine couldn't get running and it had the same problem (but there is no fuel pump on a 81 gs )
ended up being a vent problem i.e. the vent lines all met up in the center of the carbs and looked like
the fuel inlet but was actually the vent,a little switching around of the lines and she ran like a top.

[Punkur67]

Don't know if that question was for me Master, but it was a 2.3 pinto motor in his sand car. Everytime we shut the motor off the tank would keep pushing fuel into the carb and overflow the bowl.

[455bird]

New updates, I got off my ass today went out and tore off my carbs and ripped them apart clean them again put it all back together and it works now. I must have had some crap in them on more gas dumping