[otherwrongway]

I have a 351 with a carter AFB carb. I started with adjusting the timming then went to carb adjustments, idles great, has great response while garaged, but put it on the road and engine dies after mid to heavy throttle, starts right back up imiediatly and wont run smoothly without feathering the throttle. To my knowlage this carb has not been rebuilt. 78 Ford highboy. any ideas before i start the carb rebuild ? thanks.

[JeffB]

The first thing you want to check with a Carter AFB or Edelbrock Performer Carb is fuel pressure,it should be between 4.5 and 5.5 psi no higher.Do not think that because you may have the stock fuel pump that it won't be higher than that,that is a common mistake a lot of people make.You may not need to kit the Carb at all,just buy the top gasket and a new accelerator pump replace it and then check the float height and float drop settings and set them to specs.You can download the complete tuning guide from the Edelbrock website,the 9600 series Carters use the same internals as the Performer 1405,the 1406 is emissions calibrated leaner.The float settings I mentioned can easily go out of wack by being jostled around during shipping when the Carb is dry,"back in the day" the Speed Shop I worked in I would reset the floats on every new Carter Carb I sold and it eliminated the comebacks.

[otherwrongway]

Jeff, thanks for the reply and tips, ill roll with your advise and see what happens.

[JeffB]

Originally Posted by otherwrongway

Jeff, thanks for the reply and tips, ill roll with your advise and see what happens.

This is something you should save maybe even print it out:http://www.mymopar.com/downloads/carterafbtuning.pdf tons of great info is in there!

[Irelands child]

Good advice above, but also check the fuel filter(s). Some of the older Carters, especially if it was originally a GM version also had a porostone filter at the inlet which can cause no end of problems to the uninitiated