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Username Post: 1990 Celebrity Torque Converter        (Topic#354845)
Turbo2 
Poster
Posts: 10

Reg: 07-26-16
01-14-19 01:06 PM - Post#2757360    

What would make the torque converter on my 1990 Celebrity Eurosport Wagon with the 3.1 V6 kick in when it's in drive (not OD) and only doing about 35 MPH?
It makes the whole car vibrate.



 




Shepherd 
Frequent Contributor
Posts: 1654

Loc: Lake George, NY
Reg: 11-11-15
01-14-19 06:41 PM - Post#2757389    
    In response to Turbo2

There was a tech bulletin back in the day to update the prom to facilitate a later lock up point. Also check your tps function, this can cause this issue also.



 
Turbo2 
Poster
Posts: 10

Reg: 07-26-16
01-17-19 06:13 AM - Post#2757588    
    In response to Shepherd

Can I check the TPS with an Ohm meter?



 
junkman104 
Frequent Contributor
Posts: 1302
junkman104
Age: 59
Loc: Murphy N.C.
Reg: 01-25-14
01-17-19 06:03 PM - Post#2757641    
    In response to Turbo2

Try this https://easyautodiagnosti cs.com/gm/3.1L-3.4L/how-to-test-the-thrott le-position-sensor-1



 
Turbo2 
Poster
Posts: 10

Reg: 07-26-16
01-18-19 06:03 AM - Post#2757657    
    In response to junkman104

I just noticed that this is only happening when the car is fully warmed up. When it is cold, it works fine.



 
Turbo2 
Poster
Posts: 10

Reg: 07-26-16
02-05-19 04:47 PM - Post#2759145    
    In response to junkman104

Well, I was getting some funky readings from the TPS so I changed it. For about half the day it was running the best it has run in a decade, but the SES light would come on every time I use the gas pedal (SES was never on with the old TPS). If I let it idle or just coast down the road it would go out. Just now on my way home it went right back to locking the torque converter up at 35 MPH in drive.



 
Shepherd 
Frequent Contributor
Posts: 1654

Loc: Lake George, NY
Reg: 11-11-15
02-05-19 06:18 PM - Post#2759152    
    In response to Turbo2

Scan it for the code.



 
Turbo2 
Poster
Posts: 10

Reg: 07-26-16
02-07-19 04:59 AM - Post#2759273    
    In response to Shepherd

It has a code 22 TPS low voltage. I removed and reinstalled to make sure it was in correctly. I tested it with my multimeter and all readings are within spec but every time I press the gas pedal the SES light comes back on.



 
Shepherd 
Frequent Contributor
Posts: 1654

Loc: Lake George, NY
Reg: 11-11-15
02-08-19 10:16 AM - Post#2759393    
    In response to Turbo2

Make sure you have 5v reference signal and about .5 volts at hot idle.



 




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