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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
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Need help with factory tach

  • Thread starter Thread starter DarkProphet
  • Start date Start date May 28, 2005

DarkProphet

Founding Member
Aug 19, 2002
391
0
0
Quakertown, PA
May 28, 2005
#1
  • May 28, 2005
  • #1
hey guys I'm having a real problem with my factory tach. Sometimes it works fine, but others it will say im idleing around 100 rpm's and wont really move much. Once i hit around 4k rpm's (a guess.... cuz the tachs not working) the tach will go up to around 6k VERY fast. Anyone know of any reason why it would do this?
 
W

Willicuddy

New Member
Oct 11, 2006
17
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0
Oct 27, 2006
#2
  • Oct 27, 2006
  • #2
DarkProphet said:
hey guys I'm having a real problem with my factory tach. Sometimes it works fine, but others it will say im idleing around 100 rpm's and wont really move much. Once i hit around 4k rpm's (a guess.... cuz the tachs not working) the tach will go up to around 6k VERY fast. Anyone know of any reason why it would do this?
Click to expand...


Was looking for a post that described my problem exaclty. Anyone know of a fix? I have a monster tach and it reads fine, but the stock one has the same issues described above.
 

The Green GT

No 13 year olds are safe around me.
10 Year Member
Jan 8, 2006
1,269
19
99
Louisiana
Oct 27, 2006
#3
  • Oct 27, 2006
  • #3
Bad wire?

Its tan with a yellow stripe.
 
W

Willicuddy

New Member
Oct 11, 2006
17
0
0
Oct 27, 2006
#4
  • Oct 27, 2006
  • #4
Im thinking that might be the case. The tards that installed the Monster tach, spliced it right at the Coil, and when i went to try and disconnect it The female connector (one with the tan wire) came right out of the plastic connection. I tried to put it back in, but I guess the connector is shot.

You guys think I can repair it because Ford dealerships in my area don't carry the part anymore and most wreckers won't sell me it because I ruins their motorsets. Or does anyone know of a place that would sell an aftermarket one?
 

The Green GT

No 13 year olds are safe around me.
10 Year Member
Jan 8, 2006
1,269
19
99
Louisiana
Oct 27, 2006
#5
  • Oct 27, 2006
  • #5
Willicuddy said:
Im thinking that might be the case. The tards that installed the Monster tach, spliced it right at the Coil, and when i went to try and disconnect it The female connector (one with the tan wire) came right out of the plastic connection. I tried to put it back in, but I guess the connector is shot.

You guys think I can repair it because Ford dealerships in my area don't carry the part anymore and most wreckers won't sell me it because I ruins their motorsets. Or does anyone know of a place that would sell an aftermarket one?
Click to expand...
Im not sure but I spliced my shift light into the wire behind the cluster, you can do the same with the tach.
 
W

Willicuddy

New Member
Oct 11, 2006
17
0
0
Oct 28, 2006
#6
  • Oct 28, 2006
  • #6
Yeah you can splice everything for the tach/shift light at the cluster. My issue is that when they spliced it at the coil the ruined the connector, which has the brown/tan wire in it.

I guess I will try radio shack maybe, and make a new connector or something.
 
S

Synned

took tubgirl on a date and got banned
Mar 31, 2005
991
1
0
Philly
Oct 28, 2006
#7
  • Oct 28, 2006
  • #7
Funny this thread is here...my tach just started acting up.
It will jump from like 4-45 and then stick and then jump again...but I don't FEEL that.
So this tan/yellow wire runs from the back of the tach directly to the coil?
 
W

Willicuddy

New Member
Oct 11, 2006
17
0
0
Oct 28, 2006
#8
  • Oct 28, 2006
  • #8
Yeah, from the right side connector on the back of the instrument cluster all the way to the coil (a brown plastic 2 prong connector)
 

urban96

bubb rubb says:"woo woooooo"
Founding Member
Sep 24, 2002
3,464
1
69
Syracuse, NY
Oct 28, 2006
#9
  • Oct 28, 2006
  • #9
if you buy one of those MSD no cut connectors to use with one of their ignition boxes it comes with a new plastic connector that plugs into the coil.

http://store.summitracing.com/partdetail.asp?part=MSD-8874
 
S

Synned

took tubgirl on a date and got banned
Mar 31, 2005
991
1
0
Philly
Oct 28, 2006
#10
  • Oct 28, 2006
  • #10
Aight guys, someone explain this to me:
How is it possible that a tach would only fluctuate REALLY BAD when flooring it in 3rd gear? It doesn't make sense.
 
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