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Speedometer Problem....bad VSS?

Old 07-18-2006, 09:32 AM
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Default Speedometer Problem....bad VSS?

My speedometer has been acting up recently. Sometime while driving the speedometer will fall to zero and stay there. However, at other time it would pop back up to speed, but drop again a few moment later. At other time the speedo would totally not work at all when I start driving. If the speedo continue to not work for a few minutes the check engine light would come on.

So is this a Vehicle Speed Sensor VSS problem or can it be something else? If this is a VSS problme, where is the VSS located on a 92 2.3L MT Si?

Thank you!
Old 07-18-2006, 11:36 AM
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Default Re: Speedometer Problem....bad VSS? (f155mph)

yes it is a VSS problem..................top of the tranny....look for diagrams but you can feel it, of you know what your looking for........

try cleaning it first...brake cleaner and a wire brush....
Old 07-18-2006, 05:40 PM
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Default Re: Speedometer Problem....bad VSS? (f155mph)

be very careful while bolting it down(putting it back).. i have heard stories of people putting too much pressure in the bolts breaking whatever the sensor sits on.....
Old 07-18-2006, 05:52 PM
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Thank for the info....

Can someone please tell me what it looks like? Its it toward the back of the engine by the fuel filter? How many wires go into it?

Thanks!
Old 07-18-2006, 08:35 PM
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Default Re: (f155mph)

Ill take a pic of my tranny tomorrow and let you see exactly where it is....real convienet since my motor and tranny are sitting in a garage!
Old 07-20-2006, 10:08 PM
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So what does it look like?
Old 07-20-2006, 10:11 PM
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Default Re: (f155mph)

forgot Ill PM you tomorrow....
Old 07-20-2006, 10:56 PM
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Default Re: Speedometer Problem....bad VSS? (I got the CD5 Jeebies!)

look directy under your shifter cables for a plug(where the shifter cables hook up to the tranny). to replace it, I would remove the cables, I had too, plus its easier. its not hard tho, and I got mine for 50 bucks...
Old 07-21-2006, 12:30 AM
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Default Re: Speedometer Problem....bad VSS? (egcoupe94)

if it was you vss you would get a cel because the ecu would not see a speed input
sounds more like a speedo head
Old 07-21-2006, 12:35 AM
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Default Re: Speedometer Problem....bad VSS? (Jago)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jago &raquo;</TD></TR><TR><TD CLASS="quote">if it was you vss you would get a cel because the ecu would not see a speed input
sounds more like a speedo head</TD></TR></TABLE>

not nesasarily there is always that 10%
Old 07-21-2006, 01:14 AM
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Default Re: Speedometer Problem....bad VSS? (Jago)


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jago &raquo;</TD></TR><TR><TD CLASS="quote">if it was you vss you would get a cel because the ecu would not see a speed input
sounds more like a speedo head</TD></TR></TABLE>

he is throwing a CEL every now and then. I am 99% sure its the VSS
Old 07-21-2006, 02:02 PM
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I do get CEL when the speedo don't work. When it is working no CEL.

CD5 Thank you

Thanks
Old 07-21-2006, 08:12 PM
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Default Re: (f155mph)

well I didnt get a chance to work on my car today It was 100 dgrees!! *** that..but i did look and find you some decent pics to show you what it looks likw







hope it helps
Old 07-22-2006, 10:28 PM
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U Da man!!!

Thank you!!!
Old 07-23-2006, 02:01 PM
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Default Re: (f155mph)

your welcome
Old 07-24-2006, 10:35 AM
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I was looking around for it yesterday. Does the VSS sit right under the some cables under the TB intake?
Old 07-24-2006, 10:48 AM
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Default Re: (f155mph)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by f155mph &raquo;</TD></TR><TR><TD CLASS="quote">I was looking around for it yesterday. Does the VSS sit right under the some cables under the TB intake?</TD></TR></TABLE>

those would be your shifter cables...it is MUCH easier to remove if you just unclip the cables from their mounts...
Old 07-26-2006, 11:24 AM
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I notice a pattern. So it seem that the problem relate to temperature. When the temp is really hot outside or the engine is fully warmed up I don't have a problem. However the last two days been a little cooler and the speedo would not work until the car get fully warmed up. Today was hot and the speedo worked fine again. What might be wrong with the vss that make temperature a factor?
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