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PlymouthVoyager
New User
Jan 16, 2012, 12:44 PM
Post #1 of 7
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1990 Plymouth Voyager
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I recently purchased a 1990 Plymouth Voyager, 3.3L V6 auto trans with 93,000 miles. It soon started cutting out at 55 MPH. It runs perfect at other speeds. When it cuts out you can depress gas pedal to floor and it will down shift and take off like a rocket. Then let off at 65, and it will up shift and run perfect. The catalytic converter and exhaust appear to be brand new. I have replaced fuel pump and filter, spark plugs and wires, ran injector cleaner and sea foam through gas tank which is cleaner on the inside than most any I've seen for the age. Don't know what else to try, Is there anything else I can try? Are there even diagnostic codes for this and where would the plug be?
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nickwarner
Veteran
/ Moderator
Jan 16, 2012, 4:36 PM
Post #2 of 7
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Re: 1990 Plymouth Voyager
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There are codes, but you would need a scanner that can read OBD-1 Chrysler and the right adapter. The local parts house might sell one but its not the one they use to scan you for free. The plug on most earlier Chryslers that I've seen is under the hood near the fender. One of the guys here might have a pic they could post of it for you.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 16, 2012, 4:38 PM
Post #3 of 7
(2551 views)
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Re: 1990 Plymouth Voyager
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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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PlymouthVoyager
New User
Jan 16, 2012, 4:56 PM
Post #4 of 7
(2544 views)
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Re: 1990 Plymouth Voyager
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Yes, Found it. Local parts store does have a OBD-1 reader they will loan to me. I tried to use it today, but I couldn't find the silly plug on my van. I will read codes tomorrow, but this gets me going for the time being. Thanks so much, you guys are GREAT!
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PlymouthVoyager
New User
Jan 17, 2012, 5:00 PM
Post #5 of 7
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Re: 1990 Plymouth Voyager
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Thanks again for info on where to find my diagnostic plug. I pull DTC 15 code. The reader said that it was "No vehicle speed sensor signal during road load conditions". But I google DTC 15 ODB-1 and get varying results mostly about temperature sensor. Auto parts guys thought it may be a speed sensor on the tranny somewhere. I am stuck again, any suggestions on what to do next? Thanks again.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 17, 2012, 5:25 PM
Post #6 of 7
(2517 views)
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Re: 1990 Plymouth Voyager
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In your case it's a speed sensor code.
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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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PlymouthVoyager
New User
Jan 18, 2012, 5:47 PM
Post #7 of 7
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Re: 1990 Plymouth Voyager
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I replaced both speed sensors. Issue persists although not as bad. Tranny fluid still looks clean after I have driven it 3,000 miles or so, and still full and doesn't smell burnt and not leaking at all. The vehicles vitals are perfect. It just cuts out in low RPM in 3rd gear, sometimes lower gears too at low RPM, but not since I replaced the speed sensors, just low RPM in 3rd. What now? Try new ECM? Thanks again
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