|
|
Joined: Jun 2003
Posts: 192
CEG\'er
|
OP
CEG\'er
Joined: Jun 2003
Posts: 192 |
well its a 91 cavileir ..................when ever i go to stop at a stop sign or redlight, the car starts to shutter and then cuts off, and when you go to start it back up it starts right up, but when you go to change it into gear drive or reverse, it shakes the car and moves foward for about 6inches and cuts off, and will turn right back on but wont go any wheres, its an automatic....after letting it sit for a while itll drive
whats the problem, this sucks, i bought this car so i could swap my engine into my escort, now i have NO car and loss 1300 dollars...i could of bought air ride
Edit: Subject revised
Last edited by horseydug; 10/22/03 06:25 PM.
|
|
|
|
|
Joined: Jun 2002
Posts: 644
Veteran CEG\'er
|
|
Veteran CEG\'er
Joined: Jun 2002
Posts: 644 |
Sounds like a fairly common problem with these cars. You torque converter may be locked up. You can simply disconnect the overdrive to prevent it from locking up if that it you problem. I had the same problem on my 91 Sunbird years back. The car's still running with the overdrive disabled, and there's been no problems with it (aside from reduced gas mileage).
1999 Red / Tan SVT
#1969 of 2760
Built 4/21/99
K&N, DMD, FMS Wires, ES Insert / Bushings, PF End Links
17" FSVT 5-Spokes
Factory Spoiler
35% Tint All Around
|
|
|
|
|
Joined: Feb 2002
Posts: 25
New CEG\'er
|
|
New CEG\'er
Joined: Feb 2002
Posts: 25 |
There is a valve on the tranny that causes this. I wish I could remember the name of it right now but it is fairly common. If you call a dealer or tranny shop they should be able to tell you.
Black/Tan 00 SVT
Do Tinted windows count as modified?
K&N
resonatorless (is that a word)
Yokohama Avid V4S 225/50/ZR16
|
|
|
|
|
Joined: Feb 2002
Posts: 25
New CEG\'er
|
|
New CEG\'er
Joined: Feb 2002
Posts: 25 |
Yep that's what it was. There is a valve that locks up the torque converter, even on the three speeds. If it doesnt release when you stop it causes you symptoms. Dont wait to long to change it or it will jack up your tranny
Black/Tan 00 SVT
Do Tinted windows count as modified?
K&N
resonatorless (is that a word)
Yokohama Avid V4S 225/50/ZR16
|
|
|
|
|
Joined: Jun 2003
Posts: 192
CEG\'er
|
|
OP
CEG\'er
Joined: Jun 2003
Posts: 192 |
you guys are helpfull... so i started the car up and it ran find around the parking lot today  too scared to drive it to the shop..lol so this valve, will only shut off the torque convertor every now and again? or what? oh i really wish you guys knew the name 
|
|
|
|
|
Joined: Jun 2002
Posts: 644
Veteran CEG\'er
|
|
Veteran CEG\'er
Joined: Jun 2002
Posts: 644 |
It doesn't "shut off" you torque converter, it simply prevents it from locking up. You need some background info on how an automatic transmission works.
You torque converter constantly allows slippage. The harder you accellerate, the les slippage you get. The slower you accellerate, the more slippage it allows. Once you reach a certain speed, you torque converter "locks up", and doesn't slip any more. Once you slow down, the torque converter "unlocks", and starts slipping again. This is the way it's designed, to promote fuel economy and longevity.
But it my case, and probably in your case as well, your torque converter does not "unlock", therefore when you're sitting at idle your torque converter is locked up and won't slip, causing your car to stall. Intermittently it will go into gear fine, but more often than not it will stall when put in gear if you're not giving it gas at the same time (ie: neutral drop  ).
The switch can be accessed by removing the air cleaner. I'm not sure exactly what you have to do to disconnect it, but most likely it's as simple as removing an electrical connector. I believe its called (go figure) the Torque Converter Lockup switch (a.k.a. overdrive switch).
Don't fret - if this is your problem (more than likely) it's a 5 minute fix by someone who knows what to do. My brother-in-law (who is a mechanic and immediatly diagnosed the problem based on previous experience) disconnected in in about 5 minutes in the dark!
Also, just F.Y.I., the '91 Sunbird this was done on has been running fine for the last 3 years with the overdrive disconnected. It doesn't get great highway fuel economy, but a '91 3.1 V6 w/ 280,000km really shouldn't! 
1999 Red / Tan SVT
#1969 of 2760
Built 4/21/99
K&N, DMD, FMS Wires, ES Insert / Bushings, PF End Links
17" FSVT 5-Spokes
Factory Spoiler
35% Tint All Around
|
|
|
|
|
Joined: Sep 2002
Posts: 36
New CEG\'er
|
|
New CEG\'er
Joined: Sep 2002
Posts: 36 |
Delmar is correct on how the torque converter allows slippage when slowing down. IIRC the component is called a "torque converter soleniod" located inside of the transmission. I believe one just has to remove the transmission pan and r&r the solenoid. Call around a few tranny shops and feel them out. Does it feel like you are driving an MT and trying to come to a stop in 4th gear?
1995 Mercury Mystique LS OBD1
2.5 L Duratec ATX- No modifications
70,000 Miles w/ O.E. Water Pump or
Replaced: VSS, Lower speedo-cable(2X)
Use: Mobil 1 5w30 and Techron Fuel Treatment.;) and Mobil 1 ATF Change every 10,000 miles
|
|
|
|
|
Joined: Nov 2002
Posts: 157
CEG\'er
|
|
CEG\'er
Joined: Nov 2002
Posts: 157 |
Originally posted by delmar:
It doesn't "shut off" you torque converter, it simply prevents it from locking up. You need some background info on how an automatic transmission works.
You torque converter constantly allows slippage. The harder you accellerate, the les slippage you get. The slower you accellerate, the more slippage it allows. Once you reach a certain speed, you torque converter "locks up", and doesn't slip any more. Once you slow down, the torque converter "unlocks", and starts slipping again. This is the way it's designed, to promote fuel economy and longevity.
But it my case, and probably in your case as well, your torque converter does not "unlock", therefore when you're sitting at idle your torque converter is locked up and won't slip, causing your car to stall. Intermittently it will go into gear fine, but more often than not it will stall when put in gear if you're not giving it gas at the same time (ie: neutral drop ).
I just wanted to say that that is probably the best, concise explaination I've heard for how an auto works. 
I hope you dont mind if i use it to explain to my non-mechanically minded friends. 
|
|
|
|
|
Joined: Jun 2003
Posts: 192
CEG\'er
|
|
OP
CEG\'er
Joined: Jun 2003
Posts: 192 |
Originally posted by delmar:
The switch can be accessed by removing the air cleaner. I'm not sure exactly what you have to do to disconnect it, but most likely it's as simple as removing an electrical connector. I believe its called (go figure) the Torque Converter Lockup switch (a.k.a. overdrive switch).
Don't fret - if this is your problem (more than likely) it's a 5 minute fix by someone who knows what to do. My brother-in-law (who is a mechanic and immediatly diagnosed the problem based on previous experience) disconnected in in about 5 minutes in the dark!
THANKS ALOT!!! youve been very very informative!! but i hate to ask it of you, but could you find out what electrical connector it is? like what color? cause the mechanic had no idea......
|
|
|
|
|
Joined: Sep 2002
Posts: 3,944
Hard-core CEG'er
|
|
Hard-core CEG'er
Joined: Sep 2002
Posts: 3,944 |
Just to let everyone know, this is a common problem overall. That would be a lot of ATX's. Ford had a similar fix for the AX4N or something like that. They (the dealer) would go in the PCM, through a scan tool, and disable the solenoid that locked the TC. To Ford, problem solved. This is a classic case of what to look for if your TC is in a constant state of lock. If it were to stay this way, the engine would crank and then quickly die.
Phillip Jackson
`98 Mystique LS
262K+ and counting...
ATX rebuilt @ 151K
"This storm has broken me, my only friend!" RIP Dime
|
|
|
|
|
