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'[OT] car EGR DPFE sensor, an alternative.'
2008\11\01@142609 by microsoftwarecontrol

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It is common, for dead DPFE sensor brings you tons bad feeling.
One such small plastic case, is sold at $130.

What is included? Just a two ports differential pressure sensor.

Any one tried to buy a sensor to replace dead car sensor?
What is its specification? Who is possible pressure sensor supplier?




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2008\11\01@143726 by Herbert Graf

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On Sat, 2008-11-01 at 14:25 -0500, microsoftwarecontrol wrote:
> It is common, for dead DPFE sensor brings you tons bad feeling.
> One such small plastic case, is sold at $130.
>
> What is included? Just a two ports differential pressure sensor.
>
> Any one tried to buy a sensor to replace dead car sensor?
> What is its specification? Who is possible pressure sensor supplier?

Car sensors are expensive. Trying to "fix" one is generally a waste of
time, often the modules are encapsulated, and the parts are house parts
(i.e. no useful part numbers).

You don't mention the brand, offhand, $130 sounds like a dealer price to
me. Have you tried aftermarket suppliers? Autopartspeople.com can be
very cheap.

An alternative is wreckers, they are usually at least 50% less then the
cheapest new part. If your car is brand new (doubtful, otherwise that
part should be covered under warranty) or rare, wreckers will likely
either not have the part, or not discount it very much.

TTYL

2008\11\01@151441 by microsoftwarecontrol

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found it:
rockledge.home.comcast.net/~rockledge/RangerPictureGallery/DPFE-Voltage-Test.html
for you guy information.

If your car start feeling hesitating, jumping, pulling, EGR system is where
to check and DPFE sensor is first thing to go.

DPFE is just a differential pressure sensor, with V+, GND, 0-5V output!
nothing else inside! It is flow speed meter by throttling. Selling at $130,
by car people. is MCU people can make a difference?

I think it is possilbe to using a lower range pressure sensor, to bring
higher burning temperature for higher
gasmilage and more power. And only if higher buring temperature gets such
benifits.



{Original Message removed}

2008\11\01@172026 by Carl Denk

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I would use extreme caution with lean mixtures. Burnt valves, pistons,
etc. can easily happen fairly quickly. Having said that, some piston
aircraft engines are run at cruise power, with the fuel/air mixture on
the lean side of mixture/temperature curve. With insufficient fuel to
generate the higher temps, temperature is not an issue, but remember the
aircraft engine may run for hours at a constant power setting and one
can tweak the mixture for best economy at that power setting. Change
power setting, altitude, and everything changes, generally the mixture
is richened to a cool burning mixture on the rich side of the curve
until a steady cruise power setting can be maintained.  To do this one
needs exhaust gas temperature probes on all cylinders and an electronic
monitor that displays all temperatures graphically and alarms. There is
considerable info on the topic, mainly under the subject of "EGT"
(Exhaust gas temperature).

microsoftwarecontrol wrote:
{Quote hidden}

> {Original Message removed}

2008\11\01@172456 by Carl Denk
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Generally all the manufacturer's shop manual including the emissions
manual will have pinouts, and testing info which many times will include
calibration curves. If you look in Digikey, Mouser, etc. at sensors, the
range in price from under $30 to well over $100. Probably part of the
price is to certify parts meet specifications for the EPA.

microsoftwarecontrol wrote:
{Quote hidden}

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