Relability carburettor 3.9 how to?

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Originally Posted by bee utey

It's down the back of the engine, connected to the fuel rail. There's a vacuum hose going from it to the back of the manifold, take this off the regulator and look for signs of liquid fuel. Any liquid going down the vacuum hose will raise the fuel consumption and so you'll need another regulator. The pressure will be unaffected. I've replaced a few regulators lately for excatly that problem across a whole range of vehicles including LR products.

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Cheers mate

Will check that. Really got to get it sorted. Don't think Ive even done 1000k's in the last 12 months.. when I'm flat out getting 200k's out of a full tank I prefer to park it and use another car!
I'd be over the moon to get at least 20l/100k out of it;)

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Originally Posted by Camo

Cheers mate

Will check that. Really got to get it sorted. Don't think Ive even done 1000k's in the last 12 months.. when I'm flat out getting 200k's out of a full tank I prefer to park it and use another car!
I'd be over the moon to get at least 20l/100k out of it;)

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Checking anything with a laptop isn't going to show you if you have leaky injectors either. All it'll tell you is if you have valid signals coming back from the engine sensors.

seeya,
Shane L.

thanks guys so much it really helped I am chasing a lead on a set of strombergs this week, as to the EFI lovers I understand the reasons for keeping them but I just sealed the deal on a 1991 in roman bronze colour and the previous owner showed 4k and I bit in receipts already with new and reconditioned EFI parts and heaps of electrics, fuel pump, ECU, filters, new feed lines and all the rest and said he still has to get towed once every 4 months:(. so I plan to cut the lucas demon off at the knees with the carbs:p

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Originally Posted by shiftybigmac

thanks guys so much it really helped I am chasing a lead on a set of strombergs this week, as to the EFI lovers I understand the reasons for keeping them but I just sealed the deal on a 1991 in roman bronze colour and the previous owner showed 4k and I bit in receipts already with new and reconditioned EFI parts and heaps of electrics, fuel pump, ECU, filters, new feed lines and all the rest and said he still has to get towed once every 4 months:(. so I plan to cut the lucas demon off at the knees with the carbs:p

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I bet that when you put the carbies on your still have the same issues - the fuel injection on the 3.9 is pretty basic and easy to diagnose - give it to an expert and I am sure it will be a goer. I bet it is something to do with the ignition module - the real tuning related problem with these engines.

In anycase - I hope all is sorted and you are happy with the result.

Garry

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Originally Posted by shiftybigmac

thanks guys so much it really helped I am chasing a lead on a set of strombergs this week, as to the EFI lovers I understand the reasons for keeping them but I just sealed the deal on a 1991 in roman bronze colour and the previous owner showed 4k and I bit in receipts already with new and reconditioned EFI parts and heaps of electrics, fuel pump, ECU, filters, new feed lines and all the rest and said he still has to get towed once every 4 months:(. so I plan to cut the lucas demon off at the knees with the carbs:p

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My old 3.5 Lucas flapper EFI rangie now has over 550,000km on it. the only efi related stoppages I have had were a fuel hose that came of the fuel pump in tank...fixed on the side of the road...computer/harness plug came off...push back on and go....EFI coolant temp sender fail....didn't actually stop it tho, drove home and replaced.

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Originally Posted by shiftybigmac

thanks guys so much it really helped I am chasing a lead on a set of strombergs this week, as to the EFI lovers I understand the reasons for keeping them but I just sealed the deal on a 1991 in roman bronze colour and the previous owner showed 4k and I bit in receipts already with new and reconditioned EFI parts and heaps of electrics, fuel pump, ECU, filters, new feed lines and all the rest and said he still has to get towed once every 4 months:(. so I plan to cut the lucas demon off at the knees with the carbs:p

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I wouldn't pay money for proprietary injection parts these days..... I reckon I'd go megasquirt on anything old and fuel injected if any major component failed. Eg: Go price a simple Air Flow Meter for my 1985 Citroen CX2500 GTi Turbo and see how you feel about antique injection parts. Same thing with the old Bosch Djet injection from the 70's stuff. Just try to find the injection points for the bottom of the dizzie... :eek:

I've never fitted a megasquirt, but once done .... you can use any injection parts from any car in the future (whatever is current and cheaply available) and just update the megasquirt to match.

Once you have the injection sorted, it should be a lot more reliable long term than worn out old carbies!

seeya,
Shane L.

I would not trade the reliability of the EFI for the cantankerous fiddly old Stromberg carbies in a pink fit. Pick up a few spares (spare AFM and sensors)for peace of mind's sake and mount an EFI fuel pump on the chassis rail, in many thousands of remote and corrugated KM the in-tank fuel pump was the only item that failed on me, being suspended on a rigid pipe inside the tank it caused the pipe to fracture and draw air instead of fuel.
I have recently sold my last RR after 18 years of Rangie ownership, 1 carby model and 3 EFI. Of the 4, I would only classify the carby model as a truly unreliable vehicle.

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Originally Posted by POD

I would not trade the reliability of the EFI for the cantankerous fiddly old Stromberg carbies in a pink fit. Pick up a few spares (spare AFM and sensors)for peace of mind's sake and mount an EFI fuel pump on the chassis rail, in many thousands of remote and corrugated KM the in-tank fuel pump was the only item that failed on me, being suspended on a rigid pipe inside the tank it caused the pipe to fracture and draw air instead of fuel.
I have recently sold my last RR after 18 years of Rangie ownership, 1 carby model and 3 EFI. Of the 4, I would only classify the carby model as a truly unreliable vehicle.

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You've got me curious about that. What exactly was so unreliable? Ignitions are usually the thing that goes wrong on older engines.

Very true, usually anything with points on I've had trouble with. My 93 being pointless was faultless.

Whilst there's nothing wrong with the twin su carbs I think you will find less power and economy.
In my experience the hotwire system has been very good indeed. In 10 years ive replaced a fuel pump, tuned the airflow meter and cleaned it - thats it.

In saying that, my Dad is still scared of it, he'd rather carbies too.

Sent from my GT-I9305T using AULRO mobile app

This is a discussion that inevitably comes up here, but the point is that with carbies you've got a better chance of figuring out a problem, which I think is what the OP was asking about. EFI is far more reliable, but much harder to diagnose in the bush. I've got carbies but with electronic ignition, because in the olden days points ignition problems used to cause something like 90% of problems, as I think the RAC used to say.