HELP please my carb is filling with gas and i dont know why?

asesapie · Posted: Tue Jul 01, 2014 5:23 pm Post subject:

Well I drove the square to Costco and it's pretty warm out. She sat for about 30-45 minutes started up and then died soon there after and smelled like gas pretty strong. She then wouldn't start again for about 30 minutes. I have videos in my post before this one showing the gas just flowing into the carb after running. The motor was pretty warm as well so is the gas boiling or is it vapor lock? I have the phenolic spacers between the manifolds and carbs but the carbs are still getting warm. I have got to get this crappy problem resolved.

Who out there can tell me how to keep this car from getting too hot and not running after driving

W1K1 · Posted: Wed Jul 02, 2014 5:43 am Post subject:

Electric pump will solve the problem. BTDT
_________________
http://www.thesamba.com/vw/archives/manuals/jim_martin_engine_build.php

1973 super
1965 squareback 1500E
1971 bay window westy- subi swap

asesapie · Posted: Wed Jul 02, 2014 10:16 am Post subject:

Well I have my fuel pressure set to 3psi so I would hope that's low enough for the fuel pump to not push the fuel through. I don't really want to go to an electric pump either.

I of course have aluminum intakes and the do heat up pretty quick and the carb will heat up as well. I think it may be heat soak causing the issue more than pressure. I have all of my fuel lines raised off the case too

W1K1 · Posted: Wed Jul 02, 2014 11:47 am Post subject:

I had the same thing with the stock pump in the summer.
I put a gauge inline at the tee and the needle would pulse 2-6PSI for 15-20 minutes after shutdown from the heat.
I switched to an electric under the tank, and have never had the problem again.
Same for the wifes Superbeetle, we went through a couple pumps and never got it to work better so we switched to electric.

Put a gauge inline and see what it does on shutdown with a warm engine
_________________
http://www.thesamba.com/vw/archives/manuals/jim_martin_engine_build.php

1973 super
1965 squareback 1500E
1971 bay window westy- subi swap

Bobnotch · Posted: Wed Jul 02, 2014 7:47 pm Post subject:

asesapie · Posted: Wed Jul 02, 2014 8:50 pm Post subject:

Thanks guys. Do you have a suggestion for what electric pump to run and where to mount it? Are they easy to wire in?

Bobnotch · Posted: Wed Jul 02, 2014 9:06 pm Post subject:

asesapie · Posted: Sat Jul 05, 2014 8:06 am Post subject:

Well I bought the Mr.Gasket pump and was going to change that all today. Jacked the front of my square up last night so I can get out this morning and get it done. Well I found a big puddle of gas under the motor. Looks like the drivers side carb was somehow pulling fuel through and flooded the motor with gas. Don't know how this happened as it's just like parking on a hill? I'm thinking fuel pump and needle valve in that carb?

Now I drained the oil already but do I need to pull the motor or is it okay to change the oil a couple of times?

asesapie · Posted: Sat Jul 05, 2014 11:58 am Post subject:

Anyone out there to help me with this? Should I pull the motor or not? I assume it was leaking from the front and rear main seals.

Donnie strickland · Posted: Sat Jul 05, 2014 12:40 pm Post subject:

Fill with fresh oil and it should be OK, but it sounds like you'll need to replace the needle and seat in that carb. I think I'd go ahead and do them both.
_________________
71 Elm Green FI A/T Squareback

asesapie · Posted: Sat Jul 05, 2014 4:54 pm Post subject:

Yeah I was thinking that needed to be done too. I have the electric fuel pump installed but I'm getting no gas. Any ideas why it's not pumping?

I mounted it on the firewall near the same level as the bottom of the tank and wired the positive to the fourth fuse from the left as from what I understood it needed to be wired to an ignition powered fuse or the pump should only have power when the car is on. Should the pump make noise while on or not? Can I test at the pump somehow to see if it is getting 12v power?

Donnie strickland · Posted: Sat Jul 05, 2014 5:08 pm Post subject:

This is a 69 Square, right? If so that fuse only gets power when the headlights are on.

Image may have been reduced in size. Click image to view fullscreen.

I would mount the pump right under the gas tank for best results.
_________________
71 Elm Green FI A/T Squareback

Bobnotch · Posted: Sat Jul 05, 2014 6:07 pm Post subject:

asesapie · Posted: Sat Jul 05, 2014 7:08 pm Post subject:

Sorry long day in the sun working on my square. I meant I have it wired to the fuse 4th from the right. And I cant really mount it right under the gas tank as there isn't a good place to do so. I'll post a a pic of where I mounted it here soon.

Bobnotch · Posted: Sun Jul 06, 2014 6:26 am Post subject:

asesapie · Posted: Sun Jul 06, 2014 7:03 am Post subject:

Volt meter reads 12v power with key on. I sanded the paint down where the ground is on the firewall so that should be good. So will the fuel pump make noise when on? Thanks

Bobnotch · Posted: Sun Jul 06, 2014 7:28 am Post subject:

asesapie · Posted: Sun Jul 06, 2014 1:26 pm Post subject:

Okay I'll go give it a go here in a bit after my betters is done charging.

asesapie · Posted: Sun Jul 06, 2014 9:08 pm Post subject:

Alright so it was a really hot day in the sun on Saturday as I totally unplugged the 4th from the right fuse wire to hook a spade connector to plug both wires in and plugged into the wrong connector and didn't realize it till today. Fuel pump is working and the square is alive again.

I think it does need new needle valves though as the gas is still leaking on the passenger side carb. So I'll be ordering rebuild kits tomorrow morning.

Thanks for the assistance again fellas

asesapie · Posted: Sat Jul 12, 2014 10:56 am Post subject:

So the fuel pump sucks as it leaked fuel like a bandit from the filter that screws onto the pump. Went back to the mechanical pump and drive for a bit and no I've got vapor lock I'm pretty sure as it started up and ran then died off again like the last time that started this whole problem.

I don't know what I can do to cure this issue but I'm near throwing in the towel on the square as a bus and bug motor don't seem to have this problem of over heating constantly and causing the gas to boil over. My square has me goin crazy!!!!

It was hot enough in the engine bay that the hex bar was hot to the touch. I have everything in place for cooling but still it gets too hot. The outside temps were around 85*.


Hello! Log in or Register \| Help \| Donate \| Buy Shirts	See all banner ads \| Advertise on TheSamba.com

HELP please my carb is filling with gas and i dont know why?
Page: Previous 1, 2, 3, 4, 5, 6, 7 Next

	Forum Index -> Type 3	All times are Mountain Standard Time/Pacific Daylight Savings Time Page: Previous 1, 2, 3, 4, 5, 6, 7 Next
Page 3 of 7