question about my '63 'bird [390]

i have a question about my car..i can set the timming dead on,,set the carb so it runs darn tootin' great..take it out for a drive and when i go to stomp on the gas it doesnt seem to want to go,,like it bobbles a bit,,..even if im sitting at a light and i stab the gas to go,,it will almost stall....also when i turn it off after its been running it dont wanna restart,,it'll turn over,and sometimes it will pop through the carb'..if i advance the dist' it will fire,,is it possible it gets vapour lock?,,in the morning the choke doesnt seem to work right and i have FUCKED WITH THIS THING!!!! its a brand new carb' and a brand new dist'..i just dont get it.??...is it all realted,,HELP!!!!

 

Is your accelerator pump adjusted correctly? what kind of carb is it?

 

Same exact shit on my galaxie but suddenly it stopped, i've noticed it runs better more rich rather than lean.

 

Same here....I bought a 76 Ford F-150 with a 428 that knocked a little.....so, I replaced it with a 390 that I had been cruising in my little 50 F-1......( I gave the truck to my oldest son and kept the 390)


That 390 ran like a top.......4 barrel carb, points distributor...not one problem....drove it to Joplin, MO and CO....,....So, right after I drop the 390 into the 76 F-150....that runs a Duraspark Ignition module , mind you............ it starts coughing, spittin, misses and back fires thru the carb once in a while.....I timed it the same as when it was in my F-1??

I ended up selling it....but damn that had me baffled.

 

Sounds like acelerator pump or vacume advance, could be a combination of both. There are tune up specialst that do just that kind of stuff when the directions and a screw driver can't fix the problem. Having a dist curve set on a machine is money well spent. That's about all I know on this subject.
The Wizzard

 

hell bro..are we related???...hahahhahha..im freakin' pumped that hockeys back.....but i cant relaxe until i figure this out..im thinking its prolly the accelerater pump..its an autoline c807..anyone have any handy tips to fix this so i can go cuisin' with corncobcoupe???

 

It could be the accellerator pump diaphram is torn/leaking. Instead of squirting fuel,it's sprayin air,causing a stumble. At wide open throttle(with the engine off) there should be .015 clearance beetween the pump arm, and the adjustment bolt. If this adjustment isn't right it WILL tear out a diaphram. Also, the pump arm rides a plastic cam.which if broken/missing it won't get a pump shot,causing a stumble. Also try setting the timing at idle WITH the vacuum advance can connected at 20 deg.btdc. Timing chain stretch (excessive) could also cause it to be a dog,on accelleration. Good luck. Sparky

 

The plastic cam on the accelerator pump arm on a Holley can make all the difference in the world. There are two holes for the mounting screw marked 1 and 2. These are usually summer and winter positions as I understand it. It is also possible to put them on backwards which will greatly affect the stroke of the pump. First operate the pump by hand and make sure fuel is squirting into the carb. Next make sure the screw is adjusted as per the manual. If there is fuel, try moving the plastic cam to different positions to see if the hesitation goes away. I did this for my Edsel and never had a hesitation problem again.
-Scotty

 

I used to have that problem with my 63 Galaxie [352]. When i put my foot on the gas, i would have to feather my foot so it didn't stall. I got the Carb rebuilt and it was fine.

I know that FE's run alot better with advanced timing, I advanced mine and it was like a new engine. Before i advanced it, when it shifted into 2nd or 3rd it would feel like it was drowning. I advanced the timing and it made all the difference.

L

 

I seem to recall that the last early 60s 390 Tbird I worked on had the timing mark way off on the damper...maybe that's a common problem, and you have to time them so they run good, because the damper slips and you can't rely on the timing marks to be right?

 

Cob
Unless you're running a hell of a cam loose the twin pump to start with. TRwin pump Holleys are for engines with lots of overlap and no manifold vacuum.

Now onto bigger n better things. FEs are bad to loose the intake manifold gaskets. A leaking intake manifld gasket means a vacuum leak, a vacuum leak means you'll adjust things 'til hell won't have 'em and never ever get it right.

Another thing to look for is stickey valves, not that that's an inherant problem with an FE but a slow valve train will screw with you every time.

But I'd just about bet you got a vacuum leak on both of your motors.