400 Big Block running issues

krazykuda said

Are your fuel filters clogged?

Where is your fuel filter located, before of after the fuel pump?

I prefer to mount the fuel filter after the pump, as the fuel is gravity fed to the pump, and you don't want the restriction on that side of the pump, after it is better.


Could you have a clogged pick up tube filter in the gas tank? Sometimes they get old and fall apart and clog the pick up tube.


Check your fuel supply and then start looking at the carb next.

Click to expand...

Hi

New fuel filter is fitted, after the pump (which is an engine mounted mechanical type). Fuel filter is new and seems to be flowing well. Though I can not tell the pressure its coming in at.

Fuel lines are 8mm at the moment, though I've been told to go to 10.

Also I did notice the fuel boiling on two drives out, I had a glass (I know I've changed this now) fuel filter where you could see the fuel boiling. It does seem to run better when its cold (once it gets going).

Starts on the button everytime though - which is why I think the problem is either carb related or timing related.

Thanks

Jon