Yesterday, on the 350, I was a good boy and replaced the plug wires, distributor cap, and rotor on my 454. The wires were getting a little grilled from heat. Now the TACH doesn't work. I made sure that I reinstalled the pickup around the # 1 plug wire, which I ASSUME is the tach pickup. The wires are new MSD 8.5 mm stuff, and I did not change the coil. Did I screw up, or just miss something?
That's a tough one. I don't know how different a '91 350 would be from an '85 325, but on my 325 the tach lead came off the distributor.
Roger
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AIR 2053 “A generation which ignores history has no past and no future.” Robert Heinlein 2006 Bigfoot 25B25RQ towed by a 2001 Born Free 23RK moho
Yup, tach lead is off the distributor. Mine had been "crimped" to another wire by a PO. I would occasionally loose connectivity and my tach would bounce around.
Check to make sure the 12V/Tach plug is well seated in the distributor and then start looking for loose connections. The wire runs in the bundle up the left side of the doghouse then up.
Thanks all.
Strange--the distributor is a (presumably) 91 model electronic ignition with only a rotor and a 3 plug module under the cap. One plug is internal to the cap, and the other two go to the coil and elsewhere--I forget. If I have this right, I need to look for a wire going to the gage on the dash with a problem, coming from the module in the distribuitor. Please straighten me out if I have misunderstood---
I am assuming you have a stock HEI ignition? There should be two plugs going into the distributor. The outer is a 12V feed and the tach wire. Looking down on the dust cover they are each labeled.
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