lumpy acceleration on LPG between 1000-1500rpm

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Originally Posted by gussy

Are you suggesting that the issue could also be the LPG converter/vaporiser/reducer giving a lean mix to the engine @Beeutey? What system controls the converter? is it vacuum? or some mechanical part that gets fouled over time?

Angus

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Haven't the faintest what kind of converter you have, every one is different. On some brands of converter it is possible for water to splash into the balance line fitting. The weight of water against the diaphragm throws out its mixture delivery, usually making it rich. Vacuum generated by all parts of the inlet system change the mixture, you could even have a sopping wet air filter element. You could have even lost the security of the air cleaner case itself, causing the engine to run lean.

Noted. Thanks for all your help so far.

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Originally Posted by bee utey

Haven't the faintest what kind of converter you have, every one is different. On some brands of converter it is possible for water to splash into the balance line fitting. The weight of water against the diaphragm throws out its mixture delivery, usually making it rich. Vacuum generated by all parts of the inlet system change the mixture, you could even have a sopping wet air filter element. You could have even lost the security of the air cleaner case itself, causing the engine to run lean.

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So it turns out... after taking your advice @beeutey of letting the distributor air out when warm, that the distributor cap terminals are a little concave and the rotor edge has started to deteriorate. I'll replace them both and see how it goes! failing that, I've a new amplifier to pop in :D Hopefully in the next few days!

Is 3 years a normal lifetime for these lucas items?

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Original Lucas lasts longer than the Chinese rubbish sold in the pretty green boxes that you can buy these days. I've used genuine Bosch rotor buttons to fit XF Falcon, part no. GB864, as they are very close in the critical dimensions. They can be a bit tight on the dissy post though, rub around it with some wet and dry before you proceed.

If I were an electron, I know I'd have difficulty swimming through that corrosion in the cap. I think that was the problem. 7/8 cylinders running. I overthought the range rover's electronic system and initially missed the obvious... I'll take it for a test tomorrow. Looking forward to smooth acceleration and 8/8 cylinders firing like they should.
at least I have a spare amplifier now...
thanks for everyone's help. @beeutey I'll buy you a beer when we drive past SA after Christmas if you're keen. This is not the first time you've been a great help. Thanks.


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Originally Posted by bee utey

Original Lucas lasts longer than the Chinese rubbish sold in the pretty green boxes that you can buy these days. I've used genuine Bosch rotor buttons to fit XF Falcon, part no. GB864, as they are very close in the critical dimensions. They can be a bit tight on the dissy post though, rub around it with some wet and dry before you proceed.

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All fixed! Pretty much ready to do the Nullabor after Christmas!