Taurus Car Club of America : Ford Taurus Forum banner

1 - 11 of 11 Posts

·
Registered
Joined
·
185 Posts
Discussion Starter · #1 ·
Two days ago I run out of my car in a heavy rain, forgetting to turn off
the headlight. The next morning, the car was found dead, and I asked
my friend to jump start it. Today I drove it around and found the transmission was acting up. There is strong hesitation for 1-2, 2-3,
3-4 shift.

On the interstate, when I drove at 60mph, and accelerated, I felt
the car suddenly lost power and the speed dropped to 55mph instantly,
then went back to 60mph. I was so scared and just maintained that
speed until I found the next exit.

My car is 2004 Sable with vulcan and AX4N. The transmission was
rebuilt 1.5 years ago and I was told many components inside were
replaced including torque converter and forward clutch. The
transmission suddenly failed when driving at 70mph on the interstate,
without any preliminary symptoms. Now it has another 8,000 miles
since being rebuilt. Is the lifetime only that short for the repaired one?

For the current situation, I cannot figure out a connection between
a drained battery and transmission problem. Or is it just a
coincidence?

thanks for your input
 

·
Registered
Joined
·
405 Posts
When the battery died, the computer was cleared and now needs to relearn it's curves. Give it a couple days to complete it's drive cycle before suspecting anything is wrong.
 

·
Registered
Joined
·
185 Posts
Discussion Starter · #4 · (Edited)
The transmission was cleared this morning.

I brought it to a AAMCO shop, and they did a computer scan and road
test. I was told the transmission is OK, but the engine has misfire.

The problem codes are:

P0300 random misfire
P0316 engine misfire on start-up
B1601 PATS received incorrect key

How can a drained battery or jump start cause so many troubles?

BTW, at the stop lights, when I idled the car for a little longer,
the car was shut down automatically.

And sometimes, the "theft" warning light was lit up
when surge was felt. Could the key or ignition switch
be the culprit? I'm speculating if an unauthorized key
was detected, some cylinders will be shut down by the
ECU to protect the vehicle. Just a guess

When the battery died, the computer was cleared and now needs to relearn it's curves. Give it a couple days to complete it's drive cycle before suspecting anything is wrong.
 

·
Registered
Joined
·
185 Posts
Discussion Starter · #6 ·
I just realized that the metal plaque on the key with Mercury sign
was lost a week ago. Is the chip built in that metal plaque? so that
when the battery was recharged and the ECU relearned everything,
it cannot recognize the key?

The transmission was cleared this morning.

I brought it to a AAMCO shop, and they did a computer scan and road
test. I was told the transmission is OK, but the engine has misfire.

The problem codes are:

P0300 random misfire
P0316 engine misfire on start-up
B1601 PATS received incorrect key

How can a drained battery or jump start cause so many troubles?

BTW, at the stop lights, when I idled the car for a little longer,
the car was shut down automatically.

And sometimes, the "theft" warning light was lit up
when surge was felt. Could the key or ignition switch
be the culprit? I'm speculating if an unauthorized key
was detected, some cylinders will be shut down by the
ECU to protect the vehicle. Just a guess
 

·
Registered
Joined
·
1,365 Posts
How did you recharge the battery? It needs to be done on a 2 amp trickle charge overnight, not charged by the alternator. And how old is the battery? It may just need replacement.
 

·
Registered
Joined
·
185 Posts
Discussion Starter · #8 ·
Today when I drove it, I took a close look on the dashboard, and here
is what I observed:

If I press the gas pedal gently, the car will speed up to 55mph normally.
But if I press the gas a little harder, not even a lead foot, the engine
stalls, and the needles on both odometer and speedometer will drop
suddenly when the speed went from 35~40mph, and from 55~60mph,
indicating random misfires.

Yesterday, I thought it might a transmission shift problem, but actually
it wasn't because for a typical shift issue the engine won't lose power.

Maybe something electrical got wet with the heavy rain.
 

·
Registered
Joined
·
81 Posts
I have noticed some weird trans issues for the last week or so, with missed or delayed shifts one day, then everything great the next. I was also getting the theft light staying on for short times. At the same time the battery has been dieing. This morning the battery was very weak but just barely started the car. I made it about a mile and first the ABS light came on, then the airbag light, then the trans went crazy, jumping from gear to gear, then the tach and fuel gauges fell to zero, and lastly the wipers turned on verrrrrry slowly(the switch was off). I managed to coast to a relatives house, left the car and drove my truck to work. The car has a new battery now and as soon as I get home I plan to go drive it a little. I'd like to see if my trans issue is any different, as it seems the trans only freaks out when the battery gets exceptionally weak. I'll post later what I find.
 

·
Registered
Joined
·
23,389 Posts
What model year is the car? Low battery voltage can cause some strange behavior especially in the later model years (gen4-4.5).
 

·
Registered
Joined
·
81 Posts
What model year is the car? Low battery voltage can cause some strange behavior especially in the later model years (gen4-4.5).
Its a 99 Duratec. I got the new battery in, and the car definitely feels better than it did prior. I did feel the trans slip once yesterday on accelerating a little hard, but overall its been much better. The car has a tendency to run fine until you mash it to go around someone, it will downshift fine, take off, but when it gets alongside the car you passing and needs to upshift, it feels like it goes to neutral, then back to the same gear you were in repeatedly, and won't engage the higher gear until you back off the gas, so I look a little like an idiot cause I lose momentum trying to get it to shift.
 
1 - 11 of 11 Posts
Top