redline
Cargo Master
Joined: Aug 2000
Posts: 2,931
Likes: 12
From: SW Michigan
redline
I don't know if your tach is working correctly, or wired up correctly, or not. But if you really are only getting 3800 rpms, something is wrong. What valvesprings were installed on that '2 steps larger' cam ? If the valve springs are weak, or if they are the stockers on a big cam, that would cause problems. DF
Elder User
Joined: Apr 2003
Posts: 779
Likes: 9
From: Tumwater, Wa
redline
Originally posted by fordeverpower
the tach is a super pro tach. The engine more or less pulls about 2/3 of the rpms at 55mph with the 4.10s.
the tach is a super pro tach. The engine more or less pulls about 2/3 of the rpms at 55mph with the 4.10s.
Senior User
Joined: Jun 2003
Posts: 113
Likes: 0
redline
an igniton coil can be hooked up back ward and the engine will still run, but not like its supposed to.
you want the voltage or hot wire going to the positive side of the coil, some where on the coil top it should have a plus sighn for positive or a sighn that says bat for battery, and the negative side goes to the points or what ever trigger switch your using ( pertronix etc).
most tachometers have 4 wires, red, black, green, and white.
the red wire goes to a 12 volt source thats live when your key is switched on, the black wire goes to ground, the white wire is for the light for the tack ( you can hook this up any old time it doesnt have to be hooked up for the tach to work ) and the green wire goes to the negative side of the coil.
and like mentioned above, you may want to get a new tach if you suspect yours is flaking out or if its possible its been wired wrong.
you want the voltage or hot wire going to the positive side of the coil, some where on the coil top it should have a plus sighn for positive or a sighn that says bat for battery, and the negative side goes to the points or what ever trigger switch your using ( pertronix etc).
most tachometers have 4 wires, red, black, green, and white.
the red wire goes to a 12 volt source thats live when your key is switched on, the black wire goes to ground, the white wire is for the light for the tack ( you can hook this up any old time it doesnt have to be hooked up for the tach to work ) and the green wire goes to the negative side of the coil.
and like mentioned above, you may want to get a new tach if you suspect yours is flaking out or if its possible its been wired wrong.
Last edited by luvfordtrucks; Sep 5, 2003 at 08:50 PM.
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