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1993 lumina 3.1 auto trans issue


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rvpartsman
New User

Oct 7, 2010, 7:22 AM

Post #1 of 8 (1647 views)
1993 lumina 3.1 auto trans issue Sign In

Looking for advice or help. Here is the deal. Trans won't shift out of 1st gear. Also, the speedo don't work. I kinda think this may be linked to the issue. I replaced the ECM last night, same deal. Trans fluid ok and clean. runs great. Where should i go now? thanks for any ideas.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 7, 2010, 7:31 AM

Post #2 of 8 (1642 views)
Re: 1993 lumina 3.1 auto trans issue Sign In

Yes, I would expect they are related. I don't know why you would have changed the PCM. I suspect you have a bad Vehicle Speed sensor.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



rvpartsman
New User

Oct 7, 2010, 7:49 AM

Post #3 of 8 (1636 views)
Re: 1993 lumina 3.1 auto trans issue Sign In

Thanks, I was told the pcm need to be changed, live and learn. Where would I find the speed sensor at? Just picked the car up and don't know any of its past history. Will that throw a code? Thanks for helping out!


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 7, 2010, 9:13 AM

Post #4 of 8 (1629 views)
Re: 1993 lumina 3.1 auto trans issue Sign In

Yes, it usually would set a code. It can have problems elsewhere in the speed sensor circuit besides the sensor itself.

It's on the transmission output on the passenger side.






~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



rvpartsman
New User

Oct 7, 2010, 9:39 AM

Post #5 of 8 (1623 views)
Re: 1993 lumina 3.1 auto trans issue Sign In

Perfect, Thank You. I should check the codes and the connections first. Any advice is helpful and greatly appreciated! I'll look into it and re-post what i find. Thank You Again!


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 7, 2010, 11:35 AM

Post #6 of 8 (1618 views)
Re: 1993 lumina 3.1 auto trans issue Sign In

I don't know how you plan on testing anything but you need a portable lab scope now.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



rvpartsman
New User

Oct 7, 2010, 12:08 PM

Post #7 of 8 (1614 views)
Re: 1993 lumina 3.1 auto trans issue Sign In

I just thought you could cross pin A & B and read the flashes of the "check engine light"? Am i wrong? If so, what way to tell if its inop?(the speed sensor)
Thanks.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 7, 2010, 12:39 PM

Post #8 of 8 (1607 views)
Re: 1993 lumina 3.1 auto trans issue Sign In

You won't necessarily have an code and even if you do, it doesn't tell you what failed with component testing.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







 
 
 






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