94 camry le v6 something wrong with the idling.

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Old 08 Oct 2005, 11:45 pm   #1 (permalink)
grape
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Default 94 camry le v6 something wrong with the idling.

it was almost an accident, last Monday I drive my 94 camry le V6 auto
tranny, with 390000km on it on 401 heading warden in a traffic jam and it
was a very huge jam such that my car moved only a few inches each minute.

about half an hour since I got into the jam, that I noticed something wrong
with my idling speed (since I always put to N during stop), the rpm went up
to 800rpm which wasn't normal. so I stepped a bit on the throttle, and the
RPM reaches 1000RPM and didn't DROP down! it somehow freaken me out, and as
I put into D, I can actually feel the impact of such a high rpm the car
kinda had a very strong tendence to go forward.

I was so friggin, that I shut the engine and restarted it again, the RPM
still keeps at 1000RPM... then I did a mistake to even give a more throttle,
then it reaches 2000RPM and didn't drop down either.... I was totally
friggen out. shutdown, then restart, no use, idling RPM stayed at 2000RPM..

so I have to move on since it's not wise to stuck in highway with a
dangerous car, so I have to put it into D and drive on, at 2000RPM put into
D gave my car a huge impact, and almost crashed into front car, I stepped on
break very HARD to prevent it from moving on...I actually can feel the car
had a very strong tendency to go forward despite I pressed the break pedal.

finally, I managed to escape the highway and drove only on the locals at
20km/h with both emergency lights on. The car actually felt exactly as
someone was keep pressing the throttle pedel which if I let off break, the
car will get to up to 60km/h.... so I put it on the 2nd gear to prevent the
tranny from shifting to higher gears.. finally I managed to maintain a
steady speak at 40km/h with 2nd gear at 2000RPM.

and not far from my home, suddenly the RPM drops and the car acted totally
normal again, step on throttle the RPM went up and let off throttle the RPM
drops immediately.. wooooollaaa... problem was gone and I happily got home.

the next day I checked the throttle body, throttle valve, and see no signs
of stucking, or even if the throttle body was stucking, the gas pedal must
feel very soft as I tested to jam a screw drive into the throttle valve, so
it's confirmed not the valve problem.

it was exactly like if you give some gas, the engine will keep giving that
much amount of gas despite you let of the gas pedal. So if it reaches RPM
2000, it'll keep staying there.

it was an very old camry and I only plan to keep it until next year, what
service you people recommand to go thru? or does anyone of you know this
kinda of problem? I haven't been driving it for a week that being afraid of
the problem will come back again and cause more trouble. It seems that it's
been initiated during a heavy jamming and gone when the traffic was good
going through(locals).

THANK YOU


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Old 12 Oct 2005, 07:24 pm   #2 (permalink)
johngdole@hotmail.com
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Default Re: 94 camry le v6 something wrong with the idling.

Your idle air control valve may be sticking open. A malfunctioning
thermal vacuum valve. Or you may have an air leak allowing for the same
effect as opening the throttle.

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Old 13 Oct 2005, 01:04 am   #3 (permalink)
grape
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Default Re: 94 camry le v6 something wrong with the idling.

if there's a leak or stuck, then the RPM should stay in a specific range,
right? now the point is that, it will stay where I put it to... doesn't drop
down, I guess even if I push throttle to rev up to 7000RPM, it will stay
there too....

do you think the idle air control valve will corresponding to my throttle ?
or, the maximum air flow in idle valve will allow such a high 2000RPM?

I got quote from some shop, the diag will cost $1500.. pugh.. I want to
determine the problem first, then I'll do the repair myself.

now I am kinda suspect about the throttle position sensor, becoz it's the
actual main sensor tells ECU how much amount gas injected into the
cylinder...but I don't know if there's any easy way to detect it... but
however most throttle position sensor will cause rugh idling or retarded
acceleration mostlikely, nor exhibits like my problem.
<johngdole@hotmail.com> wrote in message
news:1129163074.848721.40180@g49g2000cwa.googlegro ups.com...
> Your idle air control valve may be sticking open. A malfunctioning
> thermal vacuum valve. Or you may have an air leak allowing for the same
> effect as opening the throttle.
>



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Old 15 Oct 2005, 12:13 am   #4 (permalink)
johngdole@hotmail.com
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Default Re: 94 camry le v6 something wrong with the idling.

Yeah, hard to tell. But you did clean the throttle body right and
confirmed no sticking throttle plate right? I didn't see any mention of
the IAC.

2000 RPM by IAC maybe, but even the IAC can't hold the throttle at
7000rpm. I would think only a sticking throttle plate will cause that
or other sources of air into the engine.

The position sensor you can check with an ohm meter. But fuel without
air isn't going to push up the rpm that high IMHO.

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Old 15 Oct 2005, 12:15 am   #5 (permalink)
johngdole@hotmail.com
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Default Re: 94 camry le v6 something wrong with the idling.

BTW, do you have cruise control in your car??

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