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340 1.4 rough ans slow idling

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Old Jun 13th, 2021, 18:29   #81
Two340'sman
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I'm afraid that I use weed killer. I keep the two cats away when I do.

Asda petrol usually.
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Old Jun 13th, 2021, 20:54   #82
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I'm afraid that I use weed killer. I keep the two cats away when I do.

Asda petrol usually.
Asda petrol used a weedkiller, hmmmmm, sounds about right!

Joking aside, would that be the 95 octane stuff?

It's not always possible to keep my hound away from whatever is growing, also there are resident wild hedgehogs and neighoburs cats often come through the garden (except when the hound is out!) so it's the old fashioned way for me or fire. Fire can get out of hand so i have to be careful where i point the blowtorch!
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Old Jun 13th, 2021, 21:43   #83
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That's sounding suspiciously like blocked jets, see how it goes over the next few days which should give the meths time to work as well. Usually works fairly quick on injection engines but they have a fuel return so it gets mixed into the fuel more quickly.
so does the 340 👍
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Old Jun 13th, 2021, 21:47   #84
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Too hot for me today, just checked oil and coolant, both look OK, no coolant in oil, no oil in coolant.
B14 head gaskets don't "Go" unless you have badly overheated them ,however old they are .... top quality parts ..

Are you sure the vacuum pipe for the breather T piece isn't cracked and leaking air especially at the heated flange under the carburettor ?
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Old Jun 13th, 2021, 21:50   #85
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Asda petrol used a weedkiller, hmmmmm, sounds about right!

Joking aside, would that be the 95 octane stuff?

It's not always possible to keep my hound away from whatever is growing, also there are resident wild hedgehogs and neighoburs cats often come through the garden (except when the hound is out!) so it's the old fashioned way for me or fire. Fire can get out of hand so i have to be careful where i point the blowtorch!
Just Asda unleaded, not sure what the quoted octane is.
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Old Jun 13th, 2021, 21:54   #86
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B14 head gaskets don't "Go" unless you have badly overheated them ,however old they are .... top quality parts ..

Are you sure the vacuum pipe for the breather T piece isn't cracked and leaking air especially at the heated flange under the carburettor ?
The one that goes from rocker cover to air filter etc? Years ago this was damaged, I made up a replacement, that looked OK.

I'll check it again.

Last edited by Two340'sman; Jun 13th, 2021 at 21:56.
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Old Jun 13th, 2021, 22:04   #87
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Just Asda unleaded, not sure what the quoted octane is.
That'll be 95 octane then. Maybe less if the fuel suppliers can get away with it. Try running it on BP Ultimate instead (make sure you get the petrol Ultimate and NOT the Diesel Ultimate!) as i think you might just be surprised how much better it runs.

There have been many PRV V6s (the earlier ones with more Renault involvement) that have run like a bag of spanners and then better petrol was used and hey presto, no more problems! I know my B280E doesn't like supermarket fuel, i won't use Tesco fuel except in dire emergencies as it killed at least 2, possibly 3 Lambda sensors in short order on my other beast and only returned about 2/3 of the economy it should have done. I've tried Shell V-Power, was good when it first came out, now as bad as supermarket fuels.
Also my other beast doesn't like supermarket fuels either, returns much better running, economy and power on BP Ultimate. Could be something as simple as that on yours.

Worth checking that T piece as Clan advised, i thought you'd already checked for air leaks though?
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Old Jun 13th, 2021, 22:14   #88
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That'll be 95 octane then. Maybe less if the fuel suppliers can get away with it. Try running it on BP Ultimate instead (make sure you get the petrol Ultimate and NOT the Diesel Ultimate!) as i think you might just be surprised how much better it runs.

There have been many PRV V6s (the earlier ones with more Renault involvement) that have run like a bag of spanners and then better petrol was used and hey presto, no more problems! I know my B280E doesn't like supermarket fuel, i won't use Tesco fuel except in dire emergencies as it killed at least 2, possibly 3 Lambda sensors in short order on my other beast and only returned about 2/3 of the economy it should have done. I've tried Shell V-Power, was good when it first came out, now as bad as supermarket fuels.
Also my other beast doesn't like supermarket fuels either, returns much better running, economy and power on BP Ultimate. Could be something as simple as that on yours.

Worth checking that T piece as Clan advised, i thought you'd already checked for air leaks though?
Yes, did check for air leaks, but worth checking again. I had thought about where I was going to top up from when tank is even lower. Some petrol stations around here have closed, I suppose electric cars may have something to do with it.
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