Thread: way richer, plugs still look lean

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Originally posted by tcodi
one thing I wanted to check on is the large tube connection on the front of the carb that I think is for PCV. I had the carb off last night and saw that this tube has a passage that leads below the throttle plates.
I had it hooked to my valve cover breathers, but wouldn't that line suck with full manifold vacuum on the breathers then?

There is a very similar connection on the rear that I have hooked to my brake booster. But both have passages leading under the throttle plates.

thats what that large tube is for. the pcv valve will control the vac. it idles ok, right?

it idles ok I guess. I still have start up problems though.
Is there supposed to be a VALVE associated with this hook up though?
All I have is breathers that I custom made that lead from the valve covers to this line on the carb. The breathers are essentially just a tube that hooks to it, I have no special valve or anything.
I'm getting the feeling I missed something big here.

Originally posted by tcodi
it idles ok I guess. I still have start up problems though.
Is there supposed to be a VALVE associated with this hook up though?
All I have is breathers that I custom made that lead from the valve covers to this line on the carb. The breathers are essentially just a tube that hooks to it, I have no special valve or anything.
I'm getting the feeling I missed something big here.

if you are running a straight vac. hose straight into your motor then that's why it lean. you have to have a pcv valve in the hose somewhere before it gets to the valve cover. you could just block that hose, just to try it, but you need to get a pcv valve installed.

http://www.sweethaven02.com/Automotive01/fig0452.gif

OH MAN I am an idiot.

welp, hopefully that is also why I have start up problems.

thanks

Originally posted by tcodi
OH MAN I am an idiot.

welp, hopefully that is also why I have start up problems.

thanks

should help everthing, you might need to stand on your head more often, to get the blood flowing the other way!!!

well, I plugged the pcv line on the carb and then just vented the breathers to the air.
This weekend I tried running it and I couldn't even get it started. The most I ever got was a weak cough every once in a while like one cylinder barely lighting.
I don't know if fixing that pcv screw up would make my idle settings far enough out of wack to prevent it from starting since I before I must have had it tuned to compensate for a major vacuum leak.

Originally posted by tcodi
well, I plugged the pcv line on the carb and then just vented the breathers to the air.
This weekend I tried running it and I couldn't even get it started. The most I ever got was a weak cough every once in a while like one cylinder barely lighting.
I don't know if fixing that pcv screw up would make my idle settings far enough out of wack to prevent it from starting since I before I must have had it tuned to compensate for a major vacuum leak.

that's not the reason it want start up. you don't start off of the idle circuit. you've got some other problems. screw your idle screws all the way in, and then back them out 2 1/2 turns for the time being.

I just don't understand what the problem is.
Before it wasn't perfect, but I could always get it started EVENTUALLY.
This time I had nothing.