my tach on my 81
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white FD lover
Joined: Feb 2003
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From: central jerzy
my tach on my 81
hey guys, just bought a 81 and the tach doesn't work. Not to up on the FBs but i want to start getting into them more so sorry if its a stupid question but, what should i be looking for to fix the tach. The speedo DOES work so it has to just be the cable i think. thanks for the help
joe
joe
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Thread Starter
white FD lover
Joined: Feb 2003
Posts: 1,534
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From: central jerzy
ya if anyone could just give me a brief discription on where to locate the cable. Sorry for being so ignorant on the topic, however im use to my FD problems, and i've never had a problem with my tach on either car. Thanks guys
-Joe
-Joe
Last edited by nopistons94; Mar 30, 2004 at 12:58 PM.
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Joined: Sep 2003
Posts: 65
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From: Wenatchee WA
I just delt with this issue and it's one of two things.
Your Ignition Coil or your Ignitor, the ignitor can be had pretty cheaply from the Parts section on the forums here, you don't wanna buy one new since they are $150 at least.
The easiest way to test your coil is to run your car and CAREFULLY pull the wire that runs from your coil to the distributor. FYI it's an easy way to shock yourself, but that's the fastest way to check it.
Most likely you will only have spark running on your Leading 2 spark plugs, the trailing ones will have no spark.
The way to check to make sure it's the coil and not the ignitor is to switch the leads/connectors of the leading and the trailing ignitor. The ignitors on located on the sides of the distributor.
When you switch the connectors on the ignitors and the car begins to make spark on the trailing plugs and not the leading plugs you know it's the ignitor.
If you get no spark at all, chances are it's the coil - but you can also check the coil using a voltmeter as well.
Check the FAQ for the 85 factory repair manual in the Engine Electrical section for pictures of all this stuff.
Your Ignition Coil or your Ignitor, the ignitor can be had pretty cheaply from the Parts section on the forums here, you don't wanna buy one new since they are $150 at least.
The easiest way to test your coil is to run your car and CAREFULLY pull the wire that runs from your coil to the distributor. FYI it's an easy way to shock yourself, but that's the fastest way to check it.
Most likely you will only have spark running on your Leading 2 spark plugs, the trailing ones will have no spark.
The way to check to make sure it's the coil and not the ignitor is to switch the leads/connectors of the leading and the trailing ignitor. The ignitors on located on the sides of the distributor.
When you switch the connectors on the ignitors and the car begins to make spark on the trailing plugs and not the leading plugs you know it's the ignitor.
If you get no spark at all, chances are it's the coil - but you can also check the coil using a voltmeter as well.
Check the FAQ for the 85 factory repair manual in the Engine Electrical section for pictures of all this stuff.
Thread Starter
white FD lover
Joined: Feb 2003
Posts: 1,534
Likes: 0
From: central jerzy
your considered to be "the man" for now on hah, thanks bro, i was never aware that a tach was so much a part of the engine in that sense, where the damn sparks arn't firing, wow
Last edited by nopistons94; Mar 30, 2004 at 01:51 PM.
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