I recently rebuilt carb, new timing set, fuel pump, cap and rotor, plugs, water pump and alternator on my newly purchased 72' F 250 w/360. I am unfamiliar with truck but no stranger to old cars and I am still trying to get choke set correctly, so that may be part of this question. When I am on highway and push on gas I hear and feel it really pick up for a second or two then drops off, it will still accelerate but not the fast pick up that it should.. any thoughts?

 

check total advance in the distributer

 

Stupid questions first - you've confirmed the butterflies open all the way when pedal is floored? Common error, make sure the linkage is correct and isn't binding on anything. Fuel pump pressure is 4-7 psi, Float level is correct, idle mixture, engine timing, etc.

 

did you set up the timing marks on the cam and crank sprocket?

 

Sorry for late reply and there are no stupid questions. Yes timing marks were lined up when installed, I did a dry float level check have not done it since carb has been installed. Mixture is good, pressure is good and I am 99% sure butterfly opens all the way I will check float and butterfly tomorrow. Thank you

 

When you rebuilt the carb which power valve did you put in it? It's rating should be approx. 1/2 of the engine's vacuum signal at idle. I.E. if your engine has 14" of vacuum at idle the power valve should be a "6.5".
Or, the tranny isn't shifting back out of Passing Gear prematurely is it?

 

Could be something as dumb as a fuel filter also.

 

I had timing set at 0 TDC and I read it should be 8 BTC and/or 6 BTC. I have it set at 8 BTC know and it feels like the problem is fixed. I still have some minor idle/choke kinks but I am working those out. THX