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Username Post: 1990 Celebrity Torque Converter        (Topic#354845)
Turbo2 
Poster
Posts: 13

Reg: 07-26-16
01-14-19 02:06 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: 1793

Loc: Lake George, NY
Reg: 11-11-15
01-14-19 07:41 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: 13

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

Can I check the TPS with an Ohm meter?



 
junkman104 
Frequent Contributor
Posts: 1371
junkman104
Age: 60
Loc: Murphy N.C.
Reg: 01-25-14
01-17-19 07:03 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: 13

Reg: 07-26-16
01-18-19 07:03 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: 13

Reg: 07-26-16
02-05-19 05:47 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: 1793

Loc: Lake George, NY
Reg: 11-11-15
02-05-19 07:18 PM - Post#2759152    
    In response to Turbo2

Scan it for the code.



 
Turbo2 
Poster
Posts: 13

Reg: 07-26-16
02-07-19 05:59 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: 1793

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

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



 
Turbo2 
Poster
Posts: 13

Reg: 07-26-16
02-21-19 08:49 AM - Post#2760413    
    In response to Shepherd

It checked out that it was all in spec so I bought another TPS from a different company and it's working great. A few days later the IAC started to act up with a low idle and even stalling a couple of times. I replaced the IAC and went through the procedure to reset it 3 times, but the sensor still isn't working correctly. When I start it up cold it idles a little high as it should but then instead of backing down the RPM's start increasing. Is this another bad sensor right out of the box, or am I missing something?



 
Shepherd 
Frequent Contributor
Posts: 1793

Loc: Lake George, NY
Reg: 11-11-15
02-23-19 08:42 AM - Post#2760556    
    In response to Turbo2

Is the tps adjusted to .5v at base idle?



 
Turbo2 
Poster
Posts: 13

Reg: 07-26-16
02-24-19 06:55 AM - Post#2760624    
    In response to Shepherd

Unlike the GM 3.8l the 3.1l doesn't appear to have any adjustment for it.



 
Shepherd 
Frequent Contributor
Posts: 1793

Loc: Lake George, NY
Reg: 11-11-15
02-24-19 06:58 AM - Post#2760625    
    In response to Turbo2

Still, get a dvom on it and see what you have.



 
Turbo2 
Poster
Posts: 13

Reg: 07-26-16
03-16-19 04:10 PM - Post#2762257    
    In response to Shepherd

All voltages were in spec again so I replaced the IAC again. The new IAC would not reset at all, it would idle super high all the time. I replaced it again and now everything is finally working like it should. It's unbelievable what we've come to, 2 original sensors last 30 years but brand new ones are junk right out of the box.



 
Shepherd 
Frequent Contributor
Posts: 1793

Loc: Lake George, NY
Reg: 11-11-15
03-17-19 03:05 PM - Post#2762311    
    In response to Turbo2

Great, you stuck with it!



 




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