XPost: alt.home.repair
From: xenolith@optusnet.com.au
On 20/9/2024 2:22 am, Max Demian wrote:
> On 19/09/2024 16:48, Snag wrote:
>> On 9/18/2024 8:09 PM, Scott Dorsey wrote:
>>> Ken Blake wrote:
>>>> I have a Mitsubishi Lancer 2003 which has low idle speed.
>>>> So low that it stalls unless I keep the gas on the peddle.
>>>>
>>>> What causes that?
>>>
>>> You're thinking backwards. Think about what happens when you're at
>>> idle.
>>> Something needs to happen to make the mixture more rich, and that
>>> could be
>>> done in all kinds of different ways. Some cars have an extra
>>> injector just
>>> for idle, some have software in the ECU that runs the normal
>>> injectors more
>>> rich, some have a gadget in the carb that is activated by engine vacuum.
>
>> A total crock of shit Scott . Idle mix is NOT enriched , if
>> anything it's leaned out . I strongly suspect it's either an IAC or
>> the MAF sensor that's malfunctioning - IAC is most likely , and can
>> USUALLY be cleared up with being cleaned with carb spray . The best
>> thing for him to do is have one of the local parts stores run an OBDC2
>> scan . Just about every parts store does this for free . Makes sales
>> for them and saves the customer money by not just throwing parts at an
>> undiagnosed problem .
>
> Modern cars are too complicated. The idle used to be controlled by a
> screw that stopped the throttle from closing completely.
>
Odd, that's what the IAC does in a TBI/PFI engine - allows air to bypass
the throttle body.
Anyway, in order to better control emissions, the last of the carbs
became too complicated. TBI/PFI simplified fuel delivery as well as
making it more accurate and, at the same time, providing better
atomisation/vapourisation. Carbs, dead and buried.
--
Xeno
Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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