And it fired up.

31 March 2008

Gravity fed petrol into pump via hose and funnel, with pump to carb line fully attached. Turned engine over, everything fired. Pretty f*cking loud. Turned it off. And on again, sounds good, no obvious misfires or horrendous noises. Topped up water and oil levels, reattached fuel tank to fuel pump. Turned key and engine fires, idles indefinitely – definitely drawing fuel from the tank. Started the car again after a few minutes and let idle for a while. Seems previously it was just bone dry, now that petrol has circulated throughout the system, fuel is pumped adequately. Engine now starts on queue.

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Fuel pump again.

30 March 2008

Took fuel pump out again, manually pumped it to get a better feel for how much force is needed on the lever. Then tested it by holding the pump in the opening for the lever whilst the engine is turning. Cam movement is definately sufficient to move lever. Bolted back on. Attached hose to fuel inlet on the pump other end in a fuel can on the floor, nothing connected to outlet – expecting to see spurts of fuel being pumped out. Nothing. Used a shorter hose and no different. Reposition fuel can above engine, with a short hose, and pump does pump fuel out with force, if it is gravity fed.

Tested fuel lines.

29 March 2008

Loosened fuel line from fuel pump to carburetter, turned engine over and no fuel leaking out at the pump – indicates no fuel would get into the carb. Noticed one of the corners of the metal fuel line from pump to carb very slightly flattened, but nothing to cause any real restriction. Undid line from tank to pump – bone dry. Attached hose to the fuel line from tank and sucked. Nothing but vapours. Blew threw it and loud echo noises inside fuel tank. Whilst everything is undone, took fuel pump out and cleaned. Tested and proven that pump is functional, when lever is manually moved it does suck fuel (from a bowl via a hose) and pump it out – proves the diaphragm is not worn out. Tested the fuel pump cam in engine and that works – pushes a screwdriver blade down as engine turns over. Bolted pump back on and tightened all pipes. No difference to start up.

Possible problem fuel line:

Fuel pump:

Fuel pump installed on engine:

Tried spraying WD40 down carburetter barrels, nothing happens, could indicate faulty ignition electrics, could not. Pulled out ignition coil and tested resistances on primary and secondary windings, appears to be good, gives a large ratio of the in/out voltages. Cleaned case and contacts while it was out. Put back in, no difference to start up. Tested spark plugs, there are sparks at each plug.

Recharged battery back in. Replaced the sheared and rusty battery clip bolts. Engine turns over at a greater rate and sounds somewhat healthy but doesn’t fire. Battery was part of the problem, must have lost it’s charge in transit. 10L of petrol put in, no change.

 

Problem must lie with either igniton electrics or fuel system. Quickly tested, there are sparks at all spark plug leads.

Recharged battery back in. Replaced the sheared and rusty battery clip bolts. Engine turns over at a greater rate and sounds somewhat healthy but doesn’t fire. Battery was part of the problem, must have lost it’s charge in transit. 10L of petrol put in, no change. Problem must lie with either igniton electrics or fuel system. Quickly tested, there are sparks at all spark plug leads.

Starter motor back on car. Still doesn’t turn over, just a faint whir. Battery unhooked and left to charge – a big ‘duh’ if this solves it – don’t think it will however, just exhausting possibilities.