Well, it isn't the fuel pump, either. Just slapped a new Holley 12-327-11 in there, supposed to supply 110 GPH and 6.5 psi. Where the Carter had 4.5 psi, this one is pushing 6.5 psi. It still happens, though. It almost seems like if I cruise at lower rpms then get on it, it will be fine for a few WOTs, then it happens. It might also be a temp thing. I'm sick of this ****, though, that's one thing I know.
Do you have another ignition to check? Could be the advacne plate has issues or is missing an advance bushing... I have a working mallory dual point that I can send you to try...
It could very well be ignition related. Drop in a genuine GM HEI (not new, just an old one you can try)...someone must have an extra around (I actually keep a spare in the trunk) and hook up the vaccuum advance, GM put it there for a reason. They have aftermarket oil pump drive rods that have a metal sleeve instead of the plastic sleeve, you might be able to install one (from the top) without dropping the pan and pump. Any chance you have a kinked fuel line? (just a possibility, I really think it is ignition and not fuel)
I happen to have another HEI but it's 100 miles away and hasn't been run in a couple of years. I can try that next weekend, I guess. I REALLY didn't want to mess with that distributor again. What is the part that I'd need, if I wanted to drop it in from the top? It looks like Chryslers used an oil pump driveshaft bushing, but that's not available (on summit) when I narrow it down to Chevrolets. I'm sure I'd mess it up anyway, causing yet another tantrum. I can't be too many more tantrums away from a heart attack or stroke, though. Isn't this **** supposed to be fun?...Because it isn't and hasn't been on this truck at all. I might try to appeal to local HAMBers in a new thread to see if anyone has an Edelbrock I can stick on there to test it out...I've got a 700R4 so that's what I've got the TV Bracket for.
Well it isn't the carb, either, at least not specific to mine. Many thanks to CT's own 100%Matt, who was kind enough to lend me a spare 1406 he had sitting around. It still clicks...but still seems that the common denominator might be either heat or the amount of time it's been running. Wondering if something in the HEI can get too hot. Oh well, this is more of an update post than anything. I have to psych myself up to wrestle with this dizzy.
Well, just to give an update. This past weekend, as a last ditch effort before pulling the distributor out, I removed the PCV hose and put a breather in its place (this is how the guy that built the engine told me to run it, anyway) and it ran about 95%. It still made the stumble/click, but only once and I flogged it fairly well for about 20 mins after that. Is it possible that this PCV Circuit in the carb might have some kind of internal leak or that the PCV valve I had on there was not right, even though it was the same one I had with the old Holley carb? Thanks. I'll keep driving it the way it is.
True, but if there is still 4.5 PSI at the inlet to the carb at full throttle, that is an indication that there is enough volume as well. Remember that the key to building pressure is a restriction somewhere upstream from the pump, in the case of a carburetor that restriction is usually the needle/seat being partially closed. (***uming that the inlet screens are clear, of course). If there were a volume issue, then the float would be dropped, needle and seat would be open, and the pressure would drop to way below 4.5 PSI.
The Jalopy Journal
