New carb loading up

[67L30WGN]

I purchased a new 600 cfm Edelbrock Performer carb, installed it per directions on my stock 350, but I'm having a problem with loading up. When cold, first thing in the morning, she fires up clean with a tap of the key. After running awhile, especially at idle or after restarting shortly after being driven, the engine starts to misfire and load up. Electric choke works perfectly. When restarting after I make a short stop, to buy lunch for intance, I have to bury the pedal to get her started, generally creating a smoke show. At other times, though rarely, the engine runs smooth and clean most of the day. Today, I installed a fuel pressure gauge and it reads 7.0-7.5 psi when running, but climbs to 9.0 psi after shut-off. I have a stock fuel pump. Is my pump pushing too much pressure for this carburetor causing the needle not to seat properly, or could I have a problem carb?

[crazy longhorn]

You need to regulate your fuel pressure to 5.5 psi (max),with the eng running & I think that will fix the problem. I have also found that the edelbrock carbs like an insulator type gasket or spacer under them (helps with the hot start/rough idle issues). crazyL

[us111]

hello,just put a new 1406 on and played with
pressures all day.gotta put a regulator in 5.5psi
is all those will take.anything above you will have a problem.

[67L30WGN]

I'll give it a try. Thanks, guys. - Ted

[67L30WGN]

Update: The fuel pressure helped, but was not the real problem. It turned out I had a very small hole in the modulator valve diaphragm. So small and that I thought the tranny fluid I was slowly losing was due to the leak around the pan.

One day, at a stop sign, the diaphragm let go altogether and I was enveloped in a huge cloud of white smoke. Of course I was stopped in one of the most environmentally consciencious areas known to man, surrounded by about forty cyclists. Soorrrrryyy! Just cause it's old doesn't mean you throw it away!

I got home, replaced the modulator valve and no more smoke and more importantly no more loading up of the carb. It just goes to show you, ya never can tell.

[88 Dippy]

have a pic on how and where you pute the regulator? i need to do this on my truck

(i even got a ticket for excesive smoke after i started the truck becuase of the flooding of the carb)

[sjarrett71]

A ticket for excessive smoke? I've never heard of anything like that. Was it a city ordinance or something cause of all the diesel trucks driven by kids that blow out the black smoke? I'm interested in this.

[88 Dippy]

Originally Posted by sjarrett71

A ticket for excessive smoke? I've never heard of anything like that. Was it a city ordinance or something cause of all the diesel trucks driven by kids that blow out the black smoke? I'm interested in this.

ehh state boy gave it to me in a parking lot wasn't even on the road. yelled at me for 30 mins abought the environment and crap then gave me "faild to maintain equipment" and in notes excesive exhuast smoke.

[67L30WGN]

[QUOTE=88 Dippy;3232979]have a pic on how and where you pute the regulator? i need to do this on my truck

I don't have a pic, but welded up a bracket to mount the regulator at the front end of the passenger side head.