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ECU Flash affects MPG? - Page 6

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Posted by Michelle Steiner on September 4, 2006, 12:16 am


Nah,  I know that you're too full of yourself/shit (same thing) to
refrain from continuing to prove that you really deserve the shirt that
Mike recommended to you.

Every newsgroup has its asshole, and you're ours.

Stop Mad Cowboy Disease:  Impeach the son of a Bush.

Posted by today on September 5, 2006, 7:39 am

On Sun, 03 Sep 2006 17:16:19 -0700, Michelle Steiner

Oh, Michelle is one of THOSE who thinks she's blood brothers with a
bunch of morons because she owns the same car as they.  I bet you were
the same kind of idiot who made friends with only Goths because they
were the only ones with FEELINGS like you.  LOL.

Assholes seem to be on the tip of your tongue a lot, darling.  :-)

Posted by mrv@kluge.net on August 26, 2006, 1:12 pm

NeoPhyte_Rep wrote:

good question.  For some reason, I had ISC stuck in my head.
Basically, I meant that the ECU does store information about your
driving and external parameters and adjusts accordingly.

Hm, buried in ome of these technical threads is the answer...
but unfortunately, I'm having trouble searching back in my archives far
enough for when the ECU upgrade was released, or when the Classics had
the battery resealing done (where many more people

Just a reminder about the governmental ratings - they don't take into
account heater or AC use, which both will lower fuel efficiency.

other thoughts:
1. It's summer in the northern hemisphere, and winter in the southern
hemisphere.  Temperatures are more extreme than a few months ago, which
means that the gasoline engine will be running more to provide for the
added climate control for these extremes.
2. did any change in fuel occur since your upgrade?  summer/winter
blend?  addition of ethanol?
3. did you have anything else done at the same time as the upgrade?
dealers are notorius for using the wrong grade of oil, oil overfill,
and not setting tire pressures correctly.
4. have you checked your parking/emergency brake?  sometimes they do
get a little sticky.
5. have you hit a pothole or curb, that may have knocked your alignment

Posted by NeoPhyte_Rep on August 26, 2006, 2:24 pm

mrv@kluge.net wrote:

1. As I said I first suspected more use of the air conditioning, but
that is back to normal and the mileage isn't.
2. I don't remember if the service occurred at the same time as the
seasonal mixture change, but that would affect more than my Prius, which
is why I came here for the experience of others.
3. I think I'm going to research these possibilities deeper.  I haven't
been in the habit of checking the dealer's employee's work, but maybe I
should be more careful.
4. I'll dig into this one, too.
5. No potholes of significance.  Lot's of small bumps since there's a
growing lack of road maintenance to save budget.

Thanks for your suggestions.

Posted by mrv@kluge.net on August 29, 2006, 11:05 pm

NeoPhyte_Rep wrote:

Found it.  ISC = idle speed control.

It was stuck in my head from reading the TSBs for the Highlander
where if the 12v battery is disconnected or drops below 7 volts, there
is a procedure to reinitialize the idle speed control.

to quote those TSBs:
"If this procedure is NOT performed, the following customer complaints
may occur:
Engine runs too long or more frequently than normal
Reduced fuel economy
Transmission gear "clatter" noise at idle is more pronounced"

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