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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
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1993 lumina 3.1 auto trans issue
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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.
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 7, 2010, 7:31 AM
Post #2 of 8
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Re: 1993 lumina 3.1 auto trans issue
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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.
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rvpartsman
New User
Oct 7, 2010, 7:49 AM
Post #3 of 8
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Re: 1993 lumina 3.1 auto trans issue
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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!
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Hammer Time
Ultimate Carjunky
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Oct 7, 2010, 9:13 AM
Post #4 of 8
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Re: 1993 lumina 3.1 auto trans issue
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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.
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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.
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rvpartsman
New User
Oct 7, 2010, 9:39 AM
Post #5 of 8
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Re: 1993 lumina 3.1 auto trans issue
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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!
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Hammer Time
Ultimate Carjunky
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Oct 7, 2010, 11:35 AM
Post #6 of 8
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Re: 1993 lumina 3.1 auto trans issue
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I don't know how you plan on testing anything but you need a portable lab scope now.
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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.
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rvpartsman
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Oct 7, 2010, 12:08 PM
Post #7 of 8
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Re: 1993 lumina 3.1 auto trans issue
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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.
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Hammer Time
Ultimate Carjunky
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Oct 7, 2010, 12:39 PM
Post #8 of 8
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Re: 1993 lumina 3.1 auto trans issue
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You won't necessarily have an code and even if you do, it doesn't tell you what failed with component testing.
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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.
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