speedo and tach quit

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speedo and tach quit

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Mitsubishi Forum >> Mitsubishi Models >> Mitsubishi 3000GT >> speedo and tach quit

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speedo and tach quit - 10/1/2005 1:03:56 PM

m3kgt_99

Posts: 224
Joined: 9/9/2004
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It all started about 4 months ago when my tach started tweaking out. It would just start twitching for no reason. It got worse and worse until one day, it just quit. I replaced my gauge assy, and the tach still does not work. I moved the needle at 1500 rpm so when you turn the car on (acc), then the needle goes to 1500, but it does not register any actual engine rpm's. So I found out that the gauge assy is NOT bad.
....NOW... 2 months later the speedo started doing the same and ended up starting this stupidness and totally quitting in the same day. I figured it was my speed sensor on my tranny, so I checked that and it is not loose. The crank sensor would be the only other thing that I could think of, but I didn't think the crank sensor would control the speed portion of my gauges. Has anyone experienced this? any suggestions or help would be greatly appreciated. Thanks,
Jed Booth LCpl. USMC

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Post #: 1

RE: speedo and tach quit - 10/1/2005 2:40:19 PM

m3kgt_99

Posts: 224
Joined: 9/9/2004
Status: offline

Okay... well I went to autozone and had them hook up the OBD-II reader and they got the following codes:
0170 Fuel Trim Bank 1
0173 Fuel Trim Bank 2
0170 Fuel Trim Bank 1
0173 Fuel Trim Bank 2
0500 Speed Sensor
The wierd thing is that we got 0170 and 0173 twice. I am guessing that I have a clogged injector or two... I am not sure, but I knew about the speed sensor. I know exactly where it is located and how to take it off, but autozone does not carry it... Does anyone have any suggestions where to get it?
Thanks,
Jed Booth LCpl. USMC

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(in reply to m3kgt_99)

Post #: 2

RE: speedo and tach quit - 10/1/2005 2:57:36 PM

Joel_CA

Posts: 472
Joined: 9/20/2005
Status: offline

I would suspect that the best place to get the right speed sensor is at the dealership. This may fix your speedo problem but will NOT fix your tach. A failing crank sensor would more than likely also cause a few drivability issues which you have not mentioned (so i'll assume u don't have any). I have seen instances the ignition module can cause sporatic tach reading with intermittent complete loss of tach signal. As for fuel trim- since you've got codes for both banks- it's likely that you've got a problem that is common to BOTH bank. An injector will only affect 1 particular bank unless you just happen clog 2 injectors at the same time. I'd suggest looking for a vacuum leak high in the intake somewhere, etc.

Good Luck!

Joel, CA

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1992 3000GT VR4 & 1996 STEALTH RT/TT #47 *both tastefully modded*

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Post #: 3

RE: speedo and tach quit - 8/18/2006 1:03:29 AM

96_eclipse_black

Posts: 4
Joined: 8/18/2006
Status: offline

can someone tell me where the speed sensor is located?
pics would beone h great also if anyone has any.

I know its on the tranny but where?
do i change it from the bottom of the car or the top?

Thanks

< Message edited by 96_eclipse_black -- 8/18/2006 1:05:55 AM >

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Post #: 4

RE: speedo and tach quit - 8/19/2006 8:27:25 PM

96_eclipse_black

Posts: 4
Joined: 8/18/2006
Status: offline

anyone...

(in reply to 96_eclipse_black)

Post #: 5

RE: speedo and tach quit - 8/19/2006 10:46:01 PM

Michaels_RT

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Joined: 7/22/2006
Status: offline