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Old 02-23-2006, 11:39 PM   #1
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1991 35' Airstream 350
Windsor , North Carolina
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Tachometer failure!!

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?

Rob Alley
1991 AS 350
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Old 02-24-2006, 05:41 AM   #2
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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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Old 02-24-2006, 06:44 AM   #3
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1986 34.5' Airstream 345
Speedway , Indiana
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The Tach lead should be one of the 2 plugs that plug into the distributor/coil cap. The cap will be marked "Tach" in the proper location.
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Old 02-24-2006, 01:00 PM   #4
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1986 34.5' Airstream 345
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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.
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Old 02-24-2006, 06:19 PM   #5
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1991 35' Airstream 350
Windsor , North Carolina
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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---

Rob
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Old 02-24-2006, 07:04 PM   #6
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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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