fuel problems

[Mike K]

hi Brenton

Sometimes , the push rod that pushes the diaphram arm is not long enough ... I've heard about this problem from Fraud V8 owners .... Take the pump off and watch the push rod come up as you turn the motor over .. is it high enough ? Just a suggestion.. I may be wrong .

Or, it may be a leaky or weak valve in the pump itself .

A 6 volt auto pulse is what you need ... it was fitted on Ford Blitz's in Hot climates

Mike

[Lynn Eades]

Is it sucking air at your change over tap (or anywhere else on the suction side of the pump.)(flexible hose etc) When you say the diaphragm is good, is it O.K. with modern fuel? Wet the valves in your pump and then put a vacuum gauge on it. It should suck about 15" to 18" of mercury. The delivery should be about 2-2 1/2 psi (which is controlled by the spring) If it does that, and holds it, then work back down your lines, as per my first comments.
That should give you something to think about.

[BSHEVLIN]

It Had A New Diaphram Fitted From A Modern Vehicle A Week Or 2 Ago. Hoped That Would Solve My Problem As The One Originally Fitted Was Okay But Seen Better Days .

[Bob McNeill]

6 volt pumps available from Midel in sydney check out www.sumidel.com they make and repair su fuel pumps and carby,s

[BSHEVLIN]

Originally Posted by Bob McNeil

6 volt pumps available from Midel in Sydney check out WWW.sumidel.com they make and repair so fuel pumps and carby

Cheers for that Bob i might get one of those if all else fails

[Mike K]

Found this on WIKI refering to Ford S.V. V8 motors

The fuel pump was mounted centrally atop the rear of the engine, driven by a reciprocating pushrod from a lobe on the camshaft. High milage engines were subject to pushrod wear that affected fuel delivery, corrected by the addtion of a simple aftermarket cap to the pushrod.Mike

[JackM]

If you can't find the problem after checking the possibilities already given by Mike and Lynn, have a look at the pick up pipe in the fuel tank - it may well have been broken or become dislodged.


Jack

[BSHEVLIN]

Originally Posted by Jack M

If you can't find the problem after checking the possibilities already given by Mike and Lynn, have a look at the pick up pipe in the fuel tank - it may well have been broken or become dislodged.


Jack

THE FUEL TANK IS CURRENTLY DISCONNECTED AS GETTING A SMALL CRACK WELDED UP. I CANT FEEL ANYTHING SUCKING UP THE HOSE IF ANYBODY IS GOING TO BE IN THE PUCKA AREA TOMORROW CALL IN TO THE MUSEUM AND AS I WILL BE WORKING ON THE BEAST TRYING TO FIX THIS MYSTERY PROB THAT HAS ELUDED ME FOR SEVERAL WEEKS.

[Mike K]

Some background and ideas here for 'hotting up' your Ford

http://en.wikipedia.org/wiki/Ford_Flathead_engine

Mike

[BSHEVLIN]

Originally Posted by JackM

If you can't find the problem after checking the possibilities already given by Mike and Lynn, have a look at the pick up pipe in the fuel tank - it may well have been broken or become dislodged.Jack

fuel tank is good and is currently not hooked up due to maintenance in that area .

[Alex Blair (RIP)]

Originally Posted by Mike Kelly

Found this on WIKI refering to Ford S.V. V8 motors

The fuel pump was mounted centrally atop the rear of the engine, driven by a reciprocating pushrod from a lobe on the camshaft. High milage engines were subject to pushrod wear that affected fuel delivery, corrected by the addtion of a simple aftermarket cap to the pushrod.Mike

This was a common problem with the old flat heads..I used to braze a layer of brass on top of the push rod..it dosen't take much..an extra 35 to 40 thousands of brass on the push rod will make all the difference in the world..a air leak on the suction side of the pump is another possibility..as previously mentioned.