Landlover99

Active Member

• Yesterday at 14:45

• #1

Hi all,
I've encountered a problem with my 1989 V8 3.5 petrol engined Landy. It's like totally dead. No signs of life even though it's spinning like a top on the starter. It *will* run fine on Easy Start, though, so the ignition system's fine. However, pumping the accelerator like mad and pulling the choke out, then spinning it over for 10 seconds and pulling a plug out confirm it's fuel starvation as the plug is dry as a bone. It *is* getting fuel pumped right up to the carbs, though, as it gushes out on the key II position if the feed's disconnected at that point. So there's something going wrong inside the carbs. Any suggestions and does anyone know what the designation of these carbs is? I know they're SU (HIF?) type but the model number would be helpful. Many thanks.

 

marjon

Well-Known Member

Full Member

• Yesterday at 14:52

• #2

If it runs on easzistart and you have fuel then I guess its time to get them off and take a look inside.

Has it been stood for a while? Cos this can gum things up.

They are pretty simple carbs TBH.

J

 

H

Hicap phill

Well-Known Member

• Yesterday at 15:30

• #3

Undo the dash pot screw. Make sure the inners rise in the carbs.

Then try no choke & foot flat to floor.
Make sure you have a good charges battery

 

Landlover99

Active Member

• Yesterday at 18:34

• #4

It's only been standing for two weeks. Whatever the problem is, it's affecting *both* carbs which is what made me initially suspect the fuel pump. But that's fine. So it's a real head-scratcher for sure.
When I did the Easy Start test, I placed a brick on the accelerator pedal so it was flat to the floor and no choke. The battery is A1. It fired-up and revved right up to its limit before the Easy Start squirt ran out. I suppose a sudden influx of dirt in the fuel could cut-off both carbs at once, but where would that come from? The tank is low, but certainly not empty as I'm getting a flood of juice coming out where the feed goes into the carbs. Do these carbs have an internal filter that might have got blocked?

 

marjon

Well-Known Member

Full Member

• Yesterday at 18:45

• #5

If I remember they have a restriction (where the 2 carbs join with the black pipe). Which maybe why you get plenty out from your other disconnected black pipe.

Would need to look for filters as I can’t remember.

J

 

Landlover99

Active Member

• Today at 00:10

• #6

AI reckons they're type HIF6, so unless anyone knows better, I'll run with that for now. I need to look into the options, the two most likely being exchange recon units or DIY with a service kit.....

 

Rangieman123

Well-Known Member

• Today at 01:25

• #7

Your carbs are plumbed with a return line back to the tank. It needs a restriction in the line down stream so that the fuel feeds to the carbs otherwise they won't receive fuel. I'd suggest checking the two 6mm nylon lines from your carbs heading towards the passenger's side of your engine bay. They are the overflow lines from your float chambers. So IF you had a needle valve passing fuel it would piddle fuel out through one of them. Check that neither line flows fuel.
Try blocking half of each carb inlet with your hands while a trusty assistant cranks it over. It's a rare occurance that SU's give a no start problem.

 

saxavordian

Well-Known Member

• Today at 02:02

• #8

Have you checked the two filters to the carbs normally grey from the rocker covers. They can gunk up occasionally. I used to clean them yearly. Su pots can jam with oil being low or none in.