89 camry auto tranmission problem PLEASE HELP!!!!

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Old 05 Mar 2004, 01:40 pm   #1 (permalink)
Jackson & Kymm Day
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Default 89 camry auto tranmission problem PLEASE HELP!!!!

I recently had a 89 Camry le wagon with a 2.0 4cyl, 170k, and I believe the
A140E/L transmission given to me. I don't know who the previous owners were.
I noticed some markings on the transmission like it had come from a junk
yard so it makes me think that the previous owner had probably the same
problem and tried to fix it by replacing the tyranny and it didn't fix it so
he got rid of the car.

Here's the problem. Under normal acceleration it wont shift until 4000 rpms
on all gears and when it does shift it seems too hard. Under hard
acceleration it will shift around 3300-3500 rpms and shifts smoother. If I'm
Driving in let's say a 35MPH zone here's what happens. It shifts at 4000
rpms for the first time I'm going about 25 mph, and then I will accelerate a
little more to get to 35mph @ 2700rpms. If in need to slow down for
something like a traffic light take my foot off the gas and apply the brake
the rpms go to 1100. The light changes before I stop so maybe I'm going
20mph now and start to accelerate and the rpms will go to 3500 or so before
the I can feel acceleration again. Everything else with the car seems great.

I've done some research and I think its it's the Throttle Position Sensor
giving me this problem. If it is the TPS would there also be other symptoms,
or could the TPS cause just this problem and not cause problems with the
other functions it controls, or am I way off on everything. I don't have
allot of money so taking it to a transmission mechanic I hope can be
avoided.

Thank you.


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Old 05 Mar 2004, 06:13 pm   #2 (permalink)
Daniel M. Dreifus
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Default Re: 89 camry auto tranmission problem PLEASE HELP!!!!

"Jackson & Kymm Day" <bozinka@comcast.net> wrote in message news:<OoednebEEeYOStXd4p2dnA@comcast.com>...

>
> I've done some research and I think its it's the Throttle Position Sensor
> giving me this problem.


Try checking the TPS with a digital multimeter. It's just a variable
resistor. Check to see the resistance increases and decreases smoothly
as the throttle opens and closes.
The factory manual has the resistance values if you need an absolute
value, but check for smoothness in the readings first. If it jumps
from zero or infinite, then you've confirmed your suspicions.
Can't say I really followed the description of the problem. If the
transmission isn't shifting until 4,000 rpm that is a problem. The
accelerator needs to be virtually on the floor to hold the gears to 4K
rpm when operating correctly.
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Old 05 Mar 2004, 09:20 pm   #3 (permalink)
Philip®
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Default Re: 89 camry auto tranmission problem PLEASE HELP!!!!

In news:c5ef7dc0.0403051613.620eb8ea@posting.google.c om,
Daniel M. Dreifus <nospampls2002@yahoo.com> being of bellicose mind
posted:
> "Jackson & Kymm Day" <bozinka@comcast.net> wrote in message
> news:<OoednebEEeYOStXd4p2dnA@comcast.com>...
>
> >
> > I've done some research and I think its it's the Throttle
> > Position Sensor giving me this problem.

>
> Try checking the TPS with a digital multimeter. It's just a
> variable
> resistor. Check to see the resistance increases and decreases
> smoothly
> as the throttle opens and closes.
> The factory manual has the resistance values if you need an
> absolute
> value, but check for smoothness in the readings first. If it jumps
> from zero or infinite, then you've confirmed your suspicions.
> Can't say I really followed the description of the problem. If the
> transmission isn't shifting until 4,000 rpm that is a problem. The
> accelerator needs to be virtually on the floor to hold the gears
> to 4K
> rpm when operating correctly.


Is the TPS signal utilized by the transmission ECU? BTW, full
throttle kickdown upshifts occur closer 5,200 rpm with the 2,000 cc
engine ... 5,600 rpm with the 2,500 cc engine.
--

- Philip @ Maximum Torque RPM


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