Continued Troubleshoot on Gassy Engine

One thing I realized is that all three carbs I tried were from the late seventies. I'm hoping a pre-emissions carb will help. The gas is definitely pouring into the throttle chamber and pooling on the plates - even at idle. I don't know what is normal, but I am assuming dripping, pooling and the squirts from the pump are excessive, and when I step on the throttle on the highway; oh man! it's overwhelming.
I did some tests for intake leaks, but if it came down to it; I might try reinstalling the manifold.
It's great to have help figuring out these problems. I can't wait to really drive this car.
-Gabe

 

Can you borrow a known good Q-jet from someone to just test with?

 

I'll try. I've just moved to this area not too long ago. I don't know anyone to ask.
I do have a CS Thermoquad coming from someone from this forum. I don't know if it's all wrong for this car, but it sure seems a cool thing to try.
This week I'm going to get some Fel-Pro or composite gaskets and re-install the intake. Which sealer works best? Any tricks?
Thanks, Gabe

 

My stocker had the infamous leak under hard WOT that sucked oil from the valley. Under advice fomr lots of folks when I put on the aluminum one I used threebond 1194, except for the end seals. Threebond is a semi drying gasket for places where parts expand n contract allot. It will hold longer as it goes with the flow where other products once cured that's it.

 

I just got the CS Thermoquad. I checked it out, set the float level, everything looks great, but the car won't run. I would describe the condition as extreme flooding, and when I throttle up to keep it running for a few minutes, it runs like it has a fried condenser.
The carb is so simple, and everything looks great that I think I'm having fuel pressure problem. I've measured it at between 8 - 5 psi, and have tried running the fuel return line from the pump to a gas can, but nothing came out. I don't know whats going on, but it looks like a fuel pressure problem.
-Gabe

 

Hi, Larry. It's a stock pump, not a GS or anything, just a new one I picked up locally recently. Changing the pump had no affect on the problem. What about tank problems?
It definitely is extreme flooding, I just noticed some gas blowing out between the block and exhaust manifold.
Scary, but at least I'm seeing some indication of a problem.
-Gabe

 

Plugs are black and sooty.

 

I set the float level because it was flooding when I first put it on. When I saw there were problems, I thought that it probably got tossed around during shipping. One float was good, the other was very low. I set the floats at 29/64" measured to the air horn with the gasket on.

 

I just disconnected the fuel line to the carb and put it to a can and ran the car on what was in the bowl. The car idled and exhaust richness gone. The pump put out 1.5 gal. in about a minute! That seems crazy?!
-Gabe

 

Could install a 3 line FP, it has a built in regulator return port that will send excess fuel back to the tank.

Shouldn't matter but might help ya.

Often just AC cars had it.

I recentaly change mine to a 2 line to dump the return line on mine.

 

Larry I had that problem with a Stg 1 pump a while back.o No:
Bob H

 

I finally got the Thermoquad to stop flooding. The driver's side float was not engaging the needle correctly, and the seat was not tight into the airhorn.
I'm gonna check the fuel pressure when I can get a gauge. I'm getting alot of volume.
This is definitely too much carb for this engine, but I want to make it work. I got it idling and it drives great, and the fumes have subsided to "normal" pre-emissions gassiness.
Now, I have alot of tuning and testing and maybe I'll get this thing to get down the road soon.
Thanks again, Gabe

 

Change the oil!

 

Further testing has shown that the cause of exhaust so gassy that it makes driving uncomfortable is idle mixture. The idle mixture effects the car throughout the whole rpm range, and in my case caused a stinky exhaust when it was too lean. There is a point on my Thermoquad were a 1/2 turn of the mixture screws makes a difference between normal driving and driving with the windows down and my ears tearing. I think with the Q-jets I was using, they were post-emissions, and in order to get the mixture right I would have had to back the screws out of the throttle plates very far. With this early T-Q, I'm about 6 turns out.
Another thing with the T-Q. I've got it on a wood base and after some highway driving, and the engine is warmed up to 190', the carb will be cold as ice. I know this is a design principal of the T-Q, but I'm surprised that it is so effective!
Thanks for all of your help, I am learning a lot, and this forum is a lot of fun!
-Gabe.