On Wed, 30 Apr 2008 22:12:46 +0000d, the_dawggie Blathered on
iny96Sj.6450$ko5.2404@[EMAIL PROTECTED]
> Toby Ponsenby wrote:
>> On Wed, 30 Apr 2008 20:58:52 +1000d, James Blathered on
>> in48185074$1@[EMAIL PROTECTED]
>>
>>> "Michael C" <mike@[EMAIL PROTECTED]
> wrote in message
>>> news:48183518$0$17509$afc38c87@[EMAIL PROTECTED]
>>>> I noticed that diesels have a lot of torque below idle. If you let
>>>> the revs of the engine drop when idling up a hill when the revs get
>>>> to around idle you suddenly get a lot of extra torque. Is this just
>>>> the way they work or is the computer opening the throttle some?
>>>>
>>>> Thanks,
>>>> Michael
>>> Yep, have noticed that, and can be a pain in the ass when in very slow
>>> moving traffic. BTW, not meaning to be too picky but you are using the
>>> word "throttle" hapharzardly. Haven't seen too many diesels that have
>>> a throttle :).
>>>
>>> James
>
> Mine has a "Hand Throttle" I would not suggest using it for cruise
> control as you wind it down manually.
>
>> Been looking for a solution to the Mongrel Part-'Throttle' Behaviour of
>> Toyota's 2H diesels - to wit - the Vacuum metering system that's only
>> half smart.
>> I want to convert to direct metering - getting Mr Vacuum completely out
>> of the game.
>> Not an easy trick to find anyone who knows how to do the changes
>> necessary.
>> Still working on getting the situation figured...
>
> Huh? - 'lux doesn't have this AFAIK. I don't have a manuel for 2H, I
> likely partly do in some box of books in garage.
>
> More info?
2H 3850 diesel gets a vacuum diaphragm that reacts to manifold pressure
which in turn controls the mixture.
Starting is achieved by an electric motor that winds the unit to full
rich then drops the mixture towards lean on of all things a timing
circuit. That's during cranking and works on the presumption that the
heaters are up to the jobbie. The Diaphragm is 'sprung' and so is quite
capable of exhibiting harmonic motion, resulting in stupidity from the
mixture.
I 'suspect' I need to replace the diaphragm and spring-set to have the
mixture exhibit some sort of stability, since time would defo be the
enemy of the diaphragm....
The effect would likely be the equivalent of you not bracing your foot
against the kick-panel on biggish bumps in the HiLuxen.
--
Toby
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