4M Troubles! :(

[EldarO]

was it the same pump thay you switched in, as in, are you sure its the same model?

maybe they gave you one, that although looked the same, had the lines the wrong way round?

obviously, if you heard gurgling when you ran air through the supply line, the pump is submerged, which is both a good and bad thing, it strikes out the possibility of the pump not actually being able to get any fuel, but raises a whole bunch of questions/possibilities as to why it still isnt working...

The car was sitting around for a while... fair enough... but why did the fuel pujmp shit itself in the first place? surely, even sitting around for a year, the Fuel pump wouldnt have a problem unless the fuel went horribly stale and absorbed enough water to rust the bugger out...

I think you need to go back and check a few things, some of them that you've already done.

- Is the pump getting fuel? yes.
- Is the line to carby clear? yes.
- Is the pump, pumping? try checking this with the pump out of the tank, i would take the vapour hose off and pump air into the tank, obviously not too much or you'll rupture something.

But the lines may just need to be primed man, try that and let us know

to see if your doing it properly, take the hose to the carby off, pump air in through the carby, and if fuel spits out, then its working, might want to do this while trying to start the car? that way, the extra air pressure sort of acts like a pump itself getting fuel to the carby, you might even have enough fuel pressure to get it started, and hopefully kick start the pump into gear...

Eldar.O.

[joecoolmk2]

But the lines may just need to be primed man, try that and let us know

to see if your doing it properly, take the hose to the carby off, pump air in through the carby, and if fuel spits out, then its working, might want to do this while trying to start the car? that way, the extra air pressure sort of acts like a pump itself getting fuel to the carby, you might even have enough fuel pressure to get it started, and hopefully kick start the pump into gear...

Eldar.O.

the lines don't take long to prime again, trust me i've run a 4M dry lots of times

that's probly the problem, the float valve might be blocked, or the jets might be blocked too.

it's just a process of elimination, you'll get it started one day......

[Brad-KE35]

Wow, thankyou all so much guys, I'll try all this tommorow. EldarO the old fuel pump shit itself, I used to drive it around a paddock and I guess the old one just packed it in. What I think may be the problem is we may have stuck it in the wrong way. Or the Carbie is blocked.

Once again I can't say thanks enough!

I'll let you know how I go with all this helpful info.

Brad

[joecoolmk2]

Wow, thankyou all so much guys, I'll try all this tommorow. EldarO the old fuel pump shit itself, I used to drive it around a paddock and I guess the old one just packed it in. What I think may be the problem is we may have stuck it in the wrong way. Or the Carbie is blocked.

Once again I can't say thanks enough!

I'll let you know how I go with all this helpful info.

Brad

you could show your appreciation by donating to my +rep

good luck too.

[cambelt]

4m pumps are not the most reliable things ive come accross over the years , try to find one at a wrecker thats allready been replaced before , so its not 30 years old , new ones are like $120 i think .

[EldarO]

he has repped, and repped well!

mate, at the end of the day, its just simple mechanical stuff, checking things, once you find something that doesnt check out, go through the reasons why it might not be working.

if you were here mate, id be around there like a shot to try and help

Eldar.O.

[Brad-KE35]

Yep!

Thats what it comes down to, simple mechanical stuff, just a matter of narrowing things down.

Cheers EldarO, top stuff mate for offerering a helping hand

[love ke70]

like i said on rollaclub dude, just hook up a short amount of hose to a jerry can and see if it lifts and returns the fuel
if thats a no go then work out why its not lifting fuel.
check, its sitting on the cam properly to actuate it etc.
once the issue is found it will be simple

[Brad-KE35]

Thanks Love,

I'll try that tommorow when I go out and work on it, Thanks for your help man

Brad

[crowncustom]

Easiest way to find out if the pump does work,pull the pump off the motor,drop the tank end of the pump into a drum of fuel and push the pump lever by hand and see if any fuel comes out the carbie side of the pump.And all M,2M and 4M fuel pumps are the same.The only difference are the later M series pumps have a return line on them.
Cheers Brett.

[Brad-KE35]

Cheers Brett,

Thats a good idea you have there, I will try it and let you know how I go

Thanks mate,

Brad

[joecoolmk2]

i think it could be because he has the filter on the pickup, it's pretty hard to get anything else wrong, if it's hooked up correctly.

has it got the petrol tank in the boot or under the car? if you've got the filter above the level of the tank, that might be the problem.

[love ke70]

why would a filter above the level of the tank be a problem?
and the filter is supposed to go before the pump

[Brad-KE35]

The fuel tank is in the boot, and apparently the dude at the wreckers said check the filter near the fuel tank, and I couldn't see one. The person who owned the car before me, had 2 filters, one on input and one on output.

I'm going out there now to have a look,

Thanks guys.
Brad

[Robbos_Toyotas]

The fuel tank is in the boot, and apparently the dude at the wreckers said check the filter near the fuel tank, and I couldn't see one. The person who owned the car before me, had 2 filters, one on input and one on output.

I'm going out there now to have a look,

Thanks guys.
Brad

the fuel filter is in the engine bay...get me a pic of the front passenger side of the motor and ill show u where it is...if its the same as my ms85 was