Tach, Speedo Going Crazy..Any Suggestions

1993 2.3LX

New Member

Apr 27, 2004

16

0

0

North Florida

Aug 2, 2005

#1

• Aug 2, 2005

• #1

My tach is reading half the RPM's it should be showing, My speedo jumps a little until 55mph then goes crazy, And my check engine light stays on. I had the local parts shop check the codes on the car and it basically said my primary coil pack was dead and my O2 sensor was dead too. I replaced the 02 and the Primary coil pack and it still does the same thing as before. Could it be my Ignition Control Module? Any info would be helpful!

 

V

vegeta_nc

New Member

Apr 20, 2004

20

0

2

Houston, TX

Aug 2, 2005

#2

• Aug 2, 2005

• #2

I had the same problem two months ago. I only replaced the module and all codes went away. But my speedo was working like normal.

I didn't get it from ford, way too much. I went to Oreilly payed about $125-150 I think.

 

1993 2.3LX

New Member

Apr 27, 2004

16

0

0

North Florida

Aug 2, 2005

#3

• Aug 2, 2005

• #3

I checked Autozone and it was about 120 it think. As far as the speedo goes...I checked the gear in the transmission and it seemed fine, so i guess it could be loose in the dash.

 

TMX

New Member

May 24, 2005

0

0

0

Houston

Aug 2, 2005

#4

• Aug 2, 2005

• #4

My problem was a bad ICM which seemed to have been caused by a shorted primary coil that had a crack in it. Changed out both, car runs great. If you pull the codes off, you should get a 223/224 code, which means you need a new ICM.

 

1993 2.3LX

New Member

Apr 27, 2004

16

0

0

North Florida

Aug 3, 2005

#5

• Aug 3, 2005

• #5

I cannot remember the number of the code but it had something to do with the injector pulse being to short. How much will a new ICM cost me? And where is it located.

 

TMX

New Member

May 24, 2005

0

0

0

Houston

Aug 3, 2005

#6

• Aug 3, 2005

• #6

It's a little over $100, the Wells ignition module I bought from Autozone was $109.99 with a lifetime limited warrenty. The ICM is located on the drivers side near the intake manifold. It is a rectangle object that faces the front with 2 plugs on it, one on top and one on bottom. It has it's own platform in a way.

I checked the injector pulse code, looks like a 187. If there are any other codes, use these two images if you don't have a repair guide or a list of the codes.
http://www.autozone.com/images/cds/gif/large/0900823d80194c9e.gif
http://www.autozone.com/images/cds/gif/large/0900823d80194c9f.gif

Not entirely sure on the speedo, but I do know the tach is controlled by the ICM, somehow it figures when the coils are firing to estimate the speed of the engine in a sense. Sometimes when you stick an MSD ignition in this DIS system, the tach will become irratic because of the multiple sparks thus requires an adapter.

 

1993 2.3LX

New Member

Apr 27, 2004

16

0

0

North Florida

Aug 4, 2005

#7

• Aug 4, 2005

• #7

I checked Advance Auto Parts and they wanted 180 for the part. I am going to get it somewhere else. I actually think my speedo may be loose in the dash. Havent had time to check though.

 

Lilwhitestang

New Member

May 2, 2005

66

0

0

Glasford, IL (Middle of nowhere)

Aug 4, 2005

#8

• Aug 4, 2005

• #8

My tach refuses to idle anywhere below 3,000 RPM's.

 

W

Willy0314

New Member

Jun 3, 2004

178

0

0

Western Ny

Aug 4, 2005

#9

• Aug 4, 2005

• #9

witch doctor?