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Tach Not Working

Penten

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Vehicle Year
1988
Make / Model
Ford
Engine Size
2.9L V-6
Transmission
Manual
Hello I Have A 88 Ranger XLT 2.9L V-6 And I Was Wondering Why My Tach Doesn't Work. I Can Shift By Sound But Its More A Thing Of Being Able To See It Than Anything Else. Anyone Know What To Check For Or Do In Order To Fix This ? Also I Think My Speedo If Off But Thats Another Thing That I Cant Really Test Myself... Unless I Want The Officer Telling Me How Fast I Was Going That Is
 


Spott

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2WD / 4WD
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First, you need to stop capitalizing words, unless the word is the first in a sentence, or a proper noun (or the title of a book, or something). Makes it much easier to read a post if it's written properly.

Secondly, the problem with your tach not responding is likely due to a bad wire or bad connection between the ignition coil, and the instrument cluster. It should be a dark green/yellow wire coming out of the ignition coil connector. It's possible the tach indicator itself is damaged, but that's less likely.

Finally, there are a couple of good ways to check your speedometer. The easiest way is to buy or borrow a GPS and compare the reading on your speedo to the info on the GPS. Failing that, get out on the highway and time mile markers. A third option is to do a little math. Measure the rollout on your tires, multiply by your diff gearing, multiply by the teeth on your speedo drive gear, and divide by the teeth on the driven gear. The speedo wants to see 1000 revolutions per mile.

See also: http://www.therangerstation.com/tech_library/Speedogear.html

Spott
 
Last edited:

Penten

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Joined
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1988
Make / Model
Ford
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2.9L V-6
Transmission
Manual
Well Thanks For The Info But As For My Grammar Its A OCD Sorry You'll Understand When You Find Your OCD Lol
 

Spott

Member
TRS Banner 2012-2015
Joined
Nov 28, 2010
Messages
925
Reaction score
19
Points
18
Location
SE Idaho
Vehicle Year
2000
Make / Model
Ford
Engine Type
4.0 V6
Transmission
Automatic
2WD / 4WD
4WD
Then you'll certainly understand if I don't help you any further.

Spott
 

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