Mystery freelander TD4 idle issue

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Joe_H said:
Hi IS trying to prove black is white - I am longingly awaiting him getting flattened on a Zebra crossing.......................:D
Moron....:rolleyes:

Now he is trying to bring in camshaft profiles, next it will be tuned intakes / headers, port mods etc (which is another subject he will know bugger all about no doubt!) - I bet you could educate him on the use of your flow bench when you were actively developing and testing such systems - but of course he will not know you had such skills and experience ? - OMG . !!!:eek: .
It is TD4 Diesel.
:D
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I must stop posting at the same time as you.
Nice Hitchhikers Guide to the Galaxy reference Joe ;)
 
wammers said:
What a load of bollocks. The engine speed of a diesel is controlled by the amount of fuel injected it doesn't matter if it's conventional injection or common rail they all work the same way. EDC uses a map to determine the maximum amount that can be injected for variable manifold pressures, throttle demands, power demands and loads. You really are clueless.
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Obviously my comment about you pig headedness was too soon lol :)
No, the above are all factors, the deciding factor and over ruling factor for final injection quantity is MASS AIR FLOW. it is the ONLY way the engine can quantify the MASS and quantity of air the engine is ingesting - period.
;)
 
Nodge68 said:
It's a diesel were talking about. The cam timings are optimised for high, low Rpm torque and so have very short overlap periods with limited scavenging. Now if you want to talk about long duration cams or large valve overlaps and what effect they have. Sure, go ahead, I'm slightly more qualified to explain the complexities of engine turning than you my friend. It's far more complex than just long duration cams. Valve to port area and port velocity as well as valve shrouding and a million other factors come into play. I know this through trial and error so my experiences are real, in the real tuning industry. Not something that you read in a book once.
Now if you want to make yourself look stupid, go right ahead.
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Do you really think so don't be so presumptive.
 
If it were only possible to have a sensor to tell you when someone isn't arguing about an issue but is arguing AROUND an issue for the sake of it then non of this would be necessary :rolleyes:
 
wammers said:
Only for the sake of him explaining what he thinks is the ideal fuel to air mixture ratio for a diesel engine. He couldn't answer. And neither can you.
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I said I could give you some figures if you wanted - you apparently did not - as it operated in a non stoichiometric mode, the normal figure of (for diesel) is around 14.6, however, in real world the range in use will be from around 16 - 80 - that data is containing in the internal ecu maps - and can only be utilised effectively when the ACCURATE air intake mass / quantity is known (Ooooooooooooo - a MAF sensor Ooooooooooooooo again.) what a plonker....
Happy now :)
 
blue beasty said:
If it were only possible to have a sensor to tell you when someone isn't arguing about an issue but is arguing AROUND an issue for the sake of it then non of this would be necessary :rolleyes:
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There is no argument BB just a total failure of these two to understand how a diesel engine works. Nothing more.
 
Nodge68 said:
He says while hurriedly researching something, anything that might make himself sound like an engine tuning genius. :confused:
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I have no need to research anything unlike you and your mate. Been there done that got the T shirt i need to prove nothing to you or anyone else. Diesels are throttled by fuel NOT by air it's simple enough to understand you seem to be struggling with that simple fact.
 
wammers said:
There is no argument BB just a total failure of these two to understand how a diesel engine works. Nothing more.
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You're trolling, nothing more. However they seem to enjoy it.

There is a limit to how much deliberate confusion is created in tech threads for the hell of it though.

It's very unhelpful for people who actually want to understand the issues rather than play who's got the biggest ego.
 
wammers said:
I have no need to research anything unlike you and your mate. Been there done that got the T shirt i need to prove nothing to you or anyone else. Diesels are throttled by fuel NOT by air it's simple enough to understand you seem to be struggling with that simple fact.
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Oh good, now he has gone back to the beginning, perhaps he will begger orf... :D
 
blue beasty said:
You're trolling, nothing more. However they seem to enjoy it.

There is a limit to how much deliberate confusion is created in tech threads for the hell of it though.

It's very unhelpful for people who actually want to understand the issues rather than play who's got the biggest ego.
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I am not trolling i am trying to give an accurate appreciation of how the motor works they are not doing that and giving out duff info. All diesels are throttled by fuel, NOT by air.
 
wammers said:
I am not trolling i am trying to give an accurate appreciation of how the motor works they are not doing that and giving out duff info. All diesels are throttled by fuel, NOT by air.
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And part of how much fuel is injected is determined by MAF readings.

Nobody is wrong as such apart from the occasional generalised stupid statement....mostly from you.
 
blue beasty said:
And part of how much fuel is injected is determined by MAF readings.

Nobody is wrong as such apart from the occasional generalised stupid statement....mostly from you.
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And you are qualified to judge my statements are you? I try to make statements that can be understood by the less well informed or less mechanically adept. Rather than just quoting from manuals as some do and themselves not understanding what they are reading. .
 
wammers said:
And you are qualified to judge my statements are you? I try to make statements that can be understood by the less well informed or less mechanically adept. Rather than just quoting from manuals as some do and themselves not understanding what they are reading. .
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Your intention is quite clear and it has nothing to do with being helpful on any level.

It's enough
 
joe nodge , I've been learning a lot about engines and wished to say thks

erm , erm , oh go on ask , lol

when an egr is blanked how does the engine control the nox values and prevent it from failing an mot on emmisions plse

not trying to be awkward in any way but just enjoy learning new things

has blown my brains abit but am slowly starting to understand, well not all of the really technical side but the principles

hats off to u both
 
blue beasty said:
Your intention is quite clear and it has nothing to do with being helpful on any level.

It's enough
Click to expand...

My intention is to correct their misinterpretation of how a diesel engine works. It is to do with being helpful so that people understand. Diesel are throttled by fuel not by air. Air is free flowing into the engine, fuel is controlled to provide throttling. What part of that do you not understand?
 
gstuart said:
joe nodge , I've been learning a lot about engines and wished to say thks

erm , erm , oh go on ask , lol

when an egr is blanked how does the engine control the nox values and prevent it from failing an mot on emmisions plse

not trying to be awkward in any way but just enjoy learning new things

has blown my brains abit but am slowly starting to understand, well not all of the really technical side but the principles

hats off to u both
Click to expand...

I doesn't control Nox output without EGR and it cannot fail an MOT as there is no Nox test in the MOT only a smoke test.
 
am going to ask a daft question please where is the air throttle on a Diesel engine
 
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