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Discussion Starter · #1 ·
The Falcon was running better than ever and I drove it down to pick up some grub. When I left the parking lot of the restaurant and got into it the car nearly died and stumbled and continued to drive. It does it every time I try to get into the secondaries. I checked my Edelbrock A/F and it goes way lean as this happens.

Any ideas? The carb sat for a couple of years before being put on a few months ago. It ran about a thousand good strong miles before this happened.
 

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Discussion Starter · #3 ·
I didn't do anything to the car just prior to this happening. It was running fine. I don't know what rods and jets are in the carb. I picked it up used.

But, it did run very well at about 13 to 1 A/F until this happened. I'm thinking a broken spring or a cloged jet or something. It had a new fuel filter on it though.
 

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Discussion Starter · #5 ·
I checked the rods, they look great with nothing built up on them or the pistons or springs. Really nice action on them.

I've just got back from some more road testing. The car will accelerate fine if I use from part to mid throttle. As soon as I try to go to full throttle it stumbles. And if I leave it floored it will stumble and stumble and stumble. Never actually "catching up" with itself.

Any ideas on secondary circuit problems? Think it might be fuel pressure? It's got a good Mallory pump but it's getting kinda old.
 

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Discussion Starter · #8 ·
Well, we pulled the top off the carb yesterday. It was all in very nice condition with very little "junk" at the bottoms of the bowls. No clogged jets or anything out of the ordinary.

I am going to put an old fuel pressure gauge on it today to see what she reads. Years ago when I put on the Mallory pump it read 8psi. But, that was years ago and maybe I have a pump developing a hole in the diaphragm.

I'll keep you guys posted.
 
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