Cold start problems with rochester quadrajet. Fuel draining out of carb ?
10-28-2010, 08:05 AM
#41
Le Mans Master
Thread Starter
I was under the belief that if the acc. pump is bad, then you will get a 'cough' from the motor when you stab the accelerator...since it's not shooting a strong stream down the carb. This was the symptom with mine to which Lars responded to about 4 months ago. I'm with Roger on the check valve, though it seems odd that you replaced the carb and the problem disappeared.
Well it sat overnight, and I just came in from the garage. Pulled the air cleaner cover off, shined a light down the carb and there was a nice squirt of fuel. Turned the key and it started right up. My guess is the acc pump. I bet if i put the old pump back in the problem would be there again. Maybe as the motor cooled the little umbrella shrunk and didnt seal properly ? No carb guy here for sure, so I dont really know the answer, all I know is it started right up. The pump was from a place called carbs unlimited, if anyone else has similar problems, the fellow suggested the "heavy duty " pump. I must say it does give a great squirt now. Thanks again to all.
10-28-2010, 08:07 AM
#42
Le Mans Master
Thread Starter
It didnt leak but now that you mention it, thats a good idea. Perhaps I should have while it was apart. I can just hope its ok in the future. Thank you.
10-28-2010, 12:28 PM
#43
I find that preparation is important when repairing for a leak fuel bowl, otherwise it will start leaking again. Lately I been glass beading the area to be expoxied. Having tried all sorts of epoxies is the stuff that seems to work the best is called All Crafts Profession Epoxy.
05-06-2020, 05:14 PM
#44
2nd Gear
Member Since: May 2020
Location: Maryland
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My 69 Firebird has a quadrajet carb and it starts hard when cold. I have been trying to find a fuel filter with the check valve and black rubber gasket but I can't find one. Do you know where I can get one?
