59 A/B surges at speed

.049 or .050 main jets should be ok,i use 5.5 PV in a single setup instead of the 7.5 ones that come in most kits.Also must be no slop in the small link from the accel pump rod to throttle hookup. The bottom pin on it wears and the hole its in does too so you get a lag in the gas feed if its worn. Also rubber cup accel. pumps and the new style inlet needle sets are junk. ken ct. OMexperiance.
 
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Hi Everyone. Epic! I'm just outside the District. Watching closely. Not much experience with your model but PM me if you want some company.

Is that key to get the air cleaner off?

-VT/JeffH
 
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I went through a similar problem recently, documented here on the Barn. I too believe you problem lies with dirt or some contamination in you main jets. I would take the carb off and take the top off and look into the float bowls for dirt. If any is evident, remove bowl plugs on the side and remove the main jets for inspection. I was advised to use a broom straw for clean out purposes and it worked great. These will not do any harm to the surfaces inside the jet. In your picture I noticed that there was no in-line filter for gas. Is there one located anywhere else in the system? Back by the tank maybe? If none is in place now, I would strongly advise that you put one in. Otherwise, you will go down this road again in the future. Let's face it, the gas these days aint' great and who knows what the tanks at you filling station are like. Good luck with the car, she looks nice.
 
He's got an inline filter just before the pump.that looks like a 34-early36 pump hard to make out, will work but not correct. Lose the reg. and replace with the filter after the pump not before it. omo ken ct.
 
Also check the vacuum brake on the distributor. You can adjust in or out just to see if thats a problem.. a vacuum rake moving in and out at slight vac when cruising will creat a stumble as well. Causes a timing fluctation.......
 
Good eye Ken. Did'nt see that at first, focused on the first pic. I have my filter after the pump, works fine.
 
Yes there is an inline filter before the pump. The fuel pump is new as well. Given that the restorer installed everything from the fuel tank to the carb, how would it already have dirt in the carb? It is a completely new fuel system including lines. They added the regulator after the initial road test when they said it was surging. They then road tested again but it stalled out after a few miles which they attributed to a bad coil. Having already spent more than I intended, I said I would replace the coil and took it home. After replacing the coil and test driving a couple of times, that is when I posted here asking if the surging was "normal".

They also installed the rubber lines. Should I ask them to replace the rubber lines?

Thanks to all for the help. I really have a lot to learn but that is what makes it interesting.
 
Shouldn't need w regulator with a stock pump and 94 carb. I'd suggest checking it all over systematically, you will get this fixed. But don't assume anything, sure all new fuel parts should not put dirt in the carb. But take the lid off and make sure it's good in there and the jets arnt blocked. Just because some thing is new, it's not guaranteed its good to go. Leant this along time ago, it's amazing what you might find.
Check the obvious stuff first, then if needed plod through bit by bit.
Good luck and keep us posted.
Martin.
 
Thanks Scooder. I think the first step is for it to go back to the shop that did the work and get them to make it right. I'll keep everyone posted. Once this issue is resolved I'll be doing more work myself and I am sure I'll be here often looking for advice.
 
Hi Everyone, Walton Feep, I agree with much of what scooder just said, just 'cuz it's new is not a guarantee that it will work.

What occurred to me is that because the whole fuel system is new, tank to intake manifold, that seems to be even more of a chance that some debris got into the stream from being in the new tank, to getting into a line as it was trimmed, many possibilities with the fuel system, but it could just as easily be a spark issue.

Post #4 from oldford2/John seems to be good advice to me.

Going back to the shop should help. You didn't ask but I'd suggest being nice to them, even though you're not completely satisfied yet. Maybe even take some brownies. You catch more flies with honey...

-VT/JeffH

[Edit: Adding photo of fuel line from pump to carb from Mac's catalog.] There is patina on this fuel line in your photos from post #22, so the line on the car could have been modified to add the pressure regulator. Not saying that modification is your issue, just showing the correct part.

Also here's a link to one of banjoQ's threads. http://www.fordbarn.com/forum/showthread.php?t=126170&highlight=banjoq&showall=1
 

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Most if not all "NEW" pumps are coming from China and the quality is not very good[too heavy a spring under the diafram] Causes high pressure over spec. If that's a 34-36 pump a correct 41 pump has a bigger bowl which holds more fuel in it.Would need more and better pics of pump to determine better. Also 41's never hade cable operated chokes they were rod operated if you don't have a throttle lever on the drivers side of the carb base its a new Dennis Carpenters repop made for 49-51 car not a 41 carb. only my quick observations. ken ct.
 
Hi Everyone, just adding to the info... This photo is from the show field at Hershey 2011, the car was in the HPOF class, a preservation car, not a restored one. I'm not enough of an expert to say this rig is correct, but I offer it for comparison.

-VT/JeffH
 

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Those pancake regulators have been a problem. My 2 cents is to replace the regulator with a Holley low pressure one and install a pressure gauge between the regulator and the carb. Set the pressure 2-3 psi and check for a vacuum leak.
 
What I think I see is someone used teflon tape on the fuel line ahead of the rubber hose. I would not use either of these on the fuel line. Good way to get a bit of tape or rubber particles in the fuel. Question what is the hose clamp on the carb top for? Probably don't have anything to do with the surging ,just curious.
 
ken ct said:
Good catch BOB,my opinion also and that's the wrong fuel pump on that 36. ken ct.
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Hello Everyone. ken_ct, That pump in post #35 photos is not flat enough on top? A later pump?

-VT/JeffH

P.S. Happy New Year and send greetings to your wife, she's a gracious hostess.
 
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