The Ford Barn

Sdmarsha1 · 10-05-2023, 10:40 AM

I have a 51 ford truck,all stock. I have been chasing an issue with backfiring and poor running under heavier throttle. Since I got the truck I have replaced the tank, fuel pump,stock carb with a national carburetor rebuilt unit, plugs, points,etc. The power valve in that carb started leaking,so I replaced it. Went through the same issues everyone else had with incorrect valves, finally got a 7.5 inhg installed. Still having the same issue. Checked points, replaced vaccum advance,no vaccum leaks can be found. Runs 17 in hg of vaccum at idle. I feel like I still have a power valve issue. I went through the carb with a kit from mike's carburetor parts when I replaced the power valve. Do I need a different rated valve?

redmodelt · 10-06-2023, 09:28 PM

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Please re-ask on the Early V8 forum page. This section is not for car questions.

10-05-2023, 10:40 AM	#1
Sdmarsha1 Junior Member Join Date: Oct 2023 Posts: 3	Holley 94 problem I have a 51 ford truck,all stock. I have been chasing an issue with backfiring and poor running under heavier throttle. Since I got the truck I have replaced the tank, fuel pump,stock carb with a national carburetor rebuilt unit, plugs, points,etc. The power valve in that carb started leaking,so I replaced it. Went through the same issues everyone else had with incorrect valves, finally got a 7.5 inhg installed. Still having the same issue. Checked points, replaced vaccum advance,no vaccum leaks can be found. Runs 17 in hg of vaccum at idle. I feel like I still have a power valve issue. I went through the carb with a kit from mike's carburetor parts when I replaced the power valve. Do I need a different rated valve?

10-06-2023, 09:28 PM	#2
redmodelt Senior Member Join Date: May 2010 Location: Portland OR Posts: 6,342	Re: Holley 94 problem Sponsored Links (Register now to hide all advertisements) Please re-ask on the Early V8 forum page. This section is not for car questions. __________________ I know the voices aren't real but damn they have some good ideas!