fuel delivery/pump

Post by **steve4063** » Thu Sep 13, 2007 5:25 pm

right wired up the pump today but no fuel is getting through

tried 3 pumps and they all seem to be pumping ok
ie air is coming out of the outlet and its sucking the inlet

trouble is no petrol is coming through and yes there is fuel in the tank

any ideas???????????

thanks

Post by **Willie** » Thu Sep 13, 2007 5:32 pm

Try blowing back through the feed pipe which connects to the pump, after a good puff you should hear the bubbles in the tank. If not then you have a blockage. If it then works ok for a short while then you have something in the tank which is stopping the fuel from flowing. Try taking off the pipe from the float chamber and inserting in a container, does fuel flow then? If yes then the valve in the float chamber is faulty.

Post by **bmcecosse** » Thu Sep 13, 2007 5:57 pm

If air is coming out - it suggests an air leak on the inlket side. trace the pipe back to the tank.

Post by **overider** » Thu Sep 13, 2007 6:08 pm

Willie wrote:Try blowing back through the feed pipe which connects to the pump, after a good puff you should hear the bubbles in the tank.

Dose this takes a big puff to do this!!!!!! ????

Post by **AndrewSkinner** » Fri Sep 14, 2007 9:53 am

You could try swapping the intake from the pump with the outlet so it is pumping air into the tank. Then (with the pump running) you can trace the pipes back to the tank and feel and listen for any air leaks. You can also have a good listen at the other end for bubbles

Post by **steve4063** » Fri Sep 14, 2007 9:59 am

AndrewSkinner wrote:You could try swapping the intake from the pump with the outlet so it is pumping air into the tank. Then (with the pump running) you can trace the pipes back to the tank and feel and listen for any air leaks. You can also have a good listen at the other end for bubbles

good thinking saved me gettin the compressor out
took 2 mins to check............

there is no bubbles at the tank so i reckon the pick up tube is missing and it's not picking the fuel up looks like a new tank is needed

Post by **bmcecosse** » Fri Sep 14, 2007 10:02 am

Is the connection not at the base of the tank ? take the pipe off the tank - carefully! And see what's going on.

Post by **steve4063** » Fri Sep 14, 2007 10:03 am

no they are about half way up aren't they

there's not a lot of fuel in it only about £5 worth but normally thats enough to start and do bits

Post by **steve4063** » Fri Sep 14, 2007 10:33 am

very strange

i blew it back with the comp to really get some air through and loads of bubbles came into the tank

i've taken the sender and the inlet hose of the tank to get a good look inside

the pipe is stuck solid on the tank so can't get that off in a hurry

but still no fuel is being pumped through ???????????? blafflin' me never had anything like this before

Post by **Orkney** » Fri Sep 14, 2007 10:40 am

any chance you can drain rod the pipe with a piece of flexi wire or long cable tie save removing it?

Post by **picky** » Fri Sep 14, 2007 12:40 pm

how long have you had tried running the fuel pump for? if the pipe leading from the tank is full of air, it might take up to a minute or so to suck all the air out and start pumping fuel.

Picky

Post by **Orkney** » Fri Sep 14, 2007 12:46 pm

Picky didnt you forget to add dont stick a supercharger on the carb inlet

Post by **picky** » Fri Sep 14, 2007 1:39 pm

Picky didnt you forget to add dont stick a supercharger on the carb inlet icon_smile.gif

That would also cause problems

Ive had to install an injection fuel pump to supply enough pressure, which ironically is also pumping air at the moment.

Picky

Post by **Orkney** » Fri Sep 14, 2007 1:52 pm

You dont give up easy do you Picky LOL matching supercharged/wormdrive fuel pump is the only way forward

Post by **Orkney** » Fri Sep 14, 2007 1:55 pm

there's not a lot of fuel in it only about £5 worth but normally thats enough to start and do bits

Stick another fivers worth in 'just in case' you might be surprised - cheap on the scale of elimination of causes thats for sure.

Post by **bmcecosse** » Fri Sep 14, 2007 1:59 pm

Try pressurising the tank - ie BLOW down the filler pipe, just to get it moving.

Post by **Orkney** » Fri Sep 14, 2007 2:16 pm

Try pressurising the tank

BRILLIANT idea - but not if your tanks like mine and needing replacement someday soon cause that just might blow it at the weakest point.
Good bit of lateral thinking though !

Post by **steve4063** » Fri Sep 14, 2007 2:46 pm

well it looks like it was the union that joined the tank was busted

i connected a hose up to the pump and it worked fine so changed the tank and the bit fell off in my hands

trouble is the tank i've got as spare has the same problem

so anyone got a spare connector/union that goes in the tank with about 2" of pipe poking out please

Post by **steve4063** » Fri Sep 14, 2007 4:30 pm

i got it sorted
as i said the pipe snapped off so i got a piece of old pipe and soldered it on and now it works a treat

good job i've still got all my tools from when i had my property maintenance business

handy saved me a bit more profit

Post by **Orkney** » Fri Sep 14, 2007 7:08 pm

soldering on a fuel tank

with fuel in it

lucky you still have your eyebrows

Morris Minor Owners Club

fuel delivery/pump

fuel delivery/pump

pump

Re: pump