Six Pack issues and rebuilding

[tommyg29]

Oooops,
Took the cuda out to a cruise in last night. Fired it up and drove it about 8 miles, and then later on the way home my wife pulled alongside in her 2012 charger just a few blocks short of home and we just both dropped it. She got a jump on me and pulled about two lengths ahead because my rears spun for a moment, and "trying" to make up for lost ground to try and catch her before we reached about 60mph or so I may have overrevved.
After I shut er down at about 60, still a couple lengths behind, I coasted home from there, and noticed the engine didnt want to idle. It seemed to be running a few cylinders short. I just pulled it into the garage, and hoped for the best. It was late.
Starting er up again today, I noticed a cap off the brake booster, and I only noticed it because it was smoking like crazy. For at least a minute after I turned it off, smoke was pouring out like a boosted bong.
I am going to cap it off again, but should that much smoke be running through the system? Hope I didnt blow a head gasket.

[HP_Cuda]

I guess the question becomes "How far did you over rev the motor?"

I would probably start pulling plugs and checking compression on each cylinder and check for water in your oil.

B

[tommyg29]

I guess the question becomes "How far did you over rev the motor?"

I would probably start pulling plugs and checking compression on each cylinder and check for water in your oil.

B

Was going to do that but it seems the problem must be related to the carburator. I stepped away for 20 minutes, including my first quick posting here, and after it stopped smoking and I found a cap to replace the one that came off, I noticed at least a half gallon of fuel poured out the booster! 
Its obviously coming straight out the vacuum line from the rear of the 6 pack. Looks like I have a long afternoon.

[HP_Cuda]

Interesting a carb problem after over rev-ing.

If you are leaking out of a vacuum line you have a leak in a gasket somewhere.

Which carb/carbs are you running?

[tommyg29]

Holly six pack

[HP_Cuda]

Well we can safely say it's the last carb that is spewing fuel. Pull the sight plug and see if it's over flowing then you know you have a float issue.

If so, I'd check the needle and seat and then if nothing else probably pull the carb to see what's going on and break her down.

[tommyg29]

The line from the rear of the carb to the booster was full of fuel and fuel was pouring out the rear of the carb when I pulled it off
What a mess

[HP_Cuda]

That sucks but you only have to pull one carb to find out what's going on.

It looks like the center carb is newer and the others are older yes?

At least the float bowl looks that way.

[cudabob496]

does your ignition system have a rev limiter?

for an over-rev, I'd be looking at the valve train.  May have some bent rods, etc.

[JS27N0B]

Could have blocked the fuel line off and ran the engine out of fuel, then un-block the line and rev the engine quickly as soon as it starts. If there is a piece of debris blocking the needle and seat this usually will clean it off without a carb tear down.


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[tommyg29]

I have an MSD ignition system and dont think now my issue was actually due to overrevving. I have changed the title of the thread now because I think this is almost certainly a fuel issue. I pulled all 3 sight plugs on the right side and the levels were below the hole.
BUT...
Later this afternoon, on a whim I tried to start the engine again and it was blocked. Pulled all the plugs and three of the cylinders were full of fuel. Cylinders 3, 4 and 8. I actually didnt check #2 because its a PITA to get to.
Tried starting again and it still seems blocked. Although it almost sounded like it could be a dead battery now. Maybe...hopefully. Hope I didnt bend or break anything.
The flooding occurred earlier today, I left the ignition on for a few minutes when I first shut it off after pulling it out of the garage and noticed the open booster vac line smoking, and then a few minutes later pouring fuel out. Somehow the fuel must have poured through the carb and down the manifold in the cylinders while the engine was off but the fuel pump still running.
BTW, that brake booster vacuum line in the rear exits the rear of the intake manifold, NOT the rear carb.
Pushed it back in the garage and will think on it and start fresh another day.
Time to go out and watch the super bowl with friends.

[Got JOB]

IN your pic the center carb vent looks connected to your valve cover breather. I have my center vented to the rear of the engine open and the air cleaner to the valve cover. Could you possibly pull fuel into the motor if the center float hung?

[jimynick]

Tommy, were the cylinders that had fuel in them in the rear? Your description of the fuel pump being on and the fuel coming out the brake vacumn line sounds like it actually filled the cylinders and intake with fuel to the point that the  fuel ran into the vacumn line! Based on your story of how it happened, I wouldn't be surprised to find the float on the rear carb stuck down where it went, when you hammered it and it never came up, with the attending fuel pouring into the carb and through to the intake. Check your oil level too, since too much gas may have gotten through to the oil pan and be careful! With that much gas, everywhere, you're just a nice, fat MSD spark away from a nasty fire possibility. You can also take that back carb right off, plug the line and cover the opening to see if the other two are doing alright, since it'll run fine on the centre carb only. Good luck and don't have TOO many pints during the game! 

[brads70]

At the very least I'd be changing the oil.  Like already mentioned a compression check with all the plugs out would be a good idea too? Hope it Ok and nothing major !

[bandt]

Sounds like you have a stuck float. Stops the needle from seating and dumping fuel in.