[Idling issues]

Hi All, 

Previously i made a post regarding some fuel pump decisions i had to make, i opted for the mechanical pump for reliability and ease of installation, pump went in a treat and there was a noticeable improvement on the first start however now the car is struggling to idle. Not idling at all would be a better way of putting it. this was my first time playing with fuel systems so has anyone got a tip or suggestion as to why this may be happening and how i would go about achieving a solid idle again. I am going to play around with the timing this weekend also as it may be up to that but i figured it wouldnt hurt to gather some other opinions.

Cheers

[Bonnet comparison]

1 hour ago, altezzaclub said:

Flatty and slanty are quite different from the screen forward-  bonnet, (longer & different slant) guards, indicators, headlights, radiator panel, grille, scuttle by the screen, stone tray under the bumper...

I have a spotless rustfree beige flatfront bonnet in Orange, but its not the sort of thing to mail readily.

Thanks for the tip mate, I figured as much but had everything possible crossed hoping someone might prove me wrong.

where are you based I do end up on the mainland a little 

[Bonnet comparison]

Hey all,

thanks for the help with my fuel pump issues, as is with project cars it’s on to the next issue. 

I had a mishap with my bonnet spitting a pin a little while ago and due to a disgusting fibreglass scoop I was blessed with the spectacle of my bonnet shattering all over my windscreen. I had a flatfront bonnet all but bought from a bloke in my state (Tasmania) and he morphed into a ghost when I was ready to come pick it up. I’ve now got the dilemma of trying to find a bonnet on an island disconnected from the rest of the country (how good).

i haven’t had a slant front before nor have I done much perving on them yet I’ve found one wrecking with a bonnet close enough to good condition for me to fix up and slap on, I am wondering though if they are the same dimensions as I’ve heard they’re different. Any help from you guys would be much appreciated as the bonnet at this point is literally all I need for this car to be complete in a roadworthy respect.

cheers

[Replacing Mechanical Fuel Pump]

5 hours ago, Banjo said:

Hi James,

                  There is a very simple test you can carry out, to see whether the issue is the pump itself, or the fuel line between tank & filter & pump.

Get a couple of metres of suitable size  clear plastic tubing. Slide one end over pump inlet spout, & stick the other end in a can of petrol, which is sited local to the engine.

Run the engine, & watch the petrol delivery through the clear plastic tubing.  There should be no bubbles evident.

If the tube end is always held below the level of petrol in the can, then there is no chance of any air being introduced. If the engine is still starving, or running out of fuel, you might want to fit another bit of clear plastic tubing, between the pump outlet & the inlet to the carby.

If there are bubbles in this line, then there is a problem with the pump diaphram or internal valves. 

If there are no bubbles, but the problem persists, then it likely to be in the carby itself.  

Likely suspects are the inlet ball/pin valve, or the carby float.  

The most common problem is a blocked carby inlet filter.  Many users don't even know there is an inlet filter in the carby, as it is not visible.  You actually have to remove/unscrew the inlet valve assembly, & then pull it out.  It is a very, very fine gauze filter, & often clogs up over time. 

Clean this filter, & if that was the issue, your problem will be  eliminated.

If you still want to go electric pump, give us a yell, & I'll post a picture of a very cheap one I picked up on ebay, that works well, although a bit noisy.

Cheers  Banjo

 

 

Hey mate I’ll be sure to give this a go when I get to actually access the car (which with all this corona virus action doesn’t look like the near future) it’s certainly getting fuel to the engine as I can drive for say 10 minutes but then I’m stuck trying to get fuel going again, rinse and repeat and I finally make it home. Would you mind chucking up a link or something to the electric fuel pump for some research to cure my boredom and help me make the right call. The plan is to go electric really and has been from the start so I might as well have a look in the meantime. 

Cheers heaps for your help

[Replacing Mechanical Fuel Pump]

On 4/11/2020 at 10:24 PM, Banjo said:

Hi James,

                  Welcome aboard !  Are you looking for a mechanical pump to replace the OEM one one the front LHS of the engine, or are you toying with possibly, switching over to an electric pump, which has some advantages, & disadvantages ?

The original OEM pumps were very reliable, but asked to suck fuel from a long way back.  I once had a mechanical pump that would not deliver.  After trying two other pumps, with the same results, I came to the conclusion, that my issue was not the pump at all.  Issue was a not perfect seal in the fuel line, that was almost undetectable, but pushed the pump beyond its limits.  Only found it by running a long piece of plastic hose from the tank to the pump input.  It worked perfectly, so hence I went looking for the point, where it was sucking in air.

It you go electric, & mount the pump in the rear of the car, this has the advantage, that the suction line is short, & the bulk of the fuel line from the back of the car, to the carby inlet, is under pressure, not vacuum.  However, the disadvantage is, that you must add some safety features to ensure the pump is powered down, if the car is involved in an accident.

Lets know your thoughts.

Cheers

Banjo

 

Hey Banjo, I was thinking about going electric purely for the purpose of modernising the thing up a bit and to me this sounds like it might be my problem, I’ve checked all the diaphragms in the pump and they are sound. Any advice on what electric pump you went with, I haven’t toyed around with fuel systems all that much but it’s definitely the problem here.

cheers

[Replacing Mechanical Fuel Pump]

Gday all, I’ve got the classic fuel pump problems with my re built 4K-C, was wondering if anyone’s got opinions on the replacement fuel pumps available before I jump into a Supercheap auto Goss Fuel pump. Anything better about and how good are these Goss pumps as opposed to the PAT pumps they offer?

any help is much appreciated cheers.