Toyota: 98 Camry stalls when warmed up

I am posting this for "John" who does not have the ability to post on
newsgroups and only view. Please post replies on this newsgroup (for the
benefit of others) AND to his email address at net


I have a Toyota Camry 96, 4cyl. A/C, Auto. It has 125,000 miles.
When you first start it cold it runs great, then after let's say
15 minutes it drives fine, but when you go to a stop sign or
slow quickly to make a turn, it will stall or almost stall. If
while driving I put it in neutral, it will sometimes stall, but
not always. I had my mechanic change the O2 sensor,
because it did pop a code, he also changed the fuel
filter because it does flutter from time to time. Otherwise it
has all kinds of power, and no other codes are present.

That's exactly the symptom I have. In conversations and private email
several possible causes have been mentioned.
Mine is not fixed yet, but my mechanic looks that engine while I rev'd it,
and said he saw the problem:

There is a vacuum-operated diaphragm [he called it a piston] that should
have moved, but didn't.
[I considered the possibility that he was overlooking some more subtle
things, which would not be visible but concluded he is almost certianly
right.]
He later said that the part in question could just be stuck. Or of course
the little vaccum hose could be defective.

Meanwhile, let's all be careful when driving: the brakes barely work when
the engine stalls.
I leave a lot of space ahead and decelerate slowly.
Downshifting as you slow can help, as can that 'secret' button on the
shoftrer (I'm assuming automatic transmission).


"Car Guy" <com> wrote in message
news:wWw5b.11025$bellglobal.com...