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Tach Flakiness

To: "British Cars" <british-cars@autox.team.net>,
Subject: Tach Flakiness
From: "Rob Reilly" <reilly@admail.fnal.gov>
Date: 31 Jan 1994 16:12:03 -0600
                       Subject:                               Time:12:35 PM
  OFFICE MEMO          Tach Flakiness                         Date:1/27/94
Tried to send only to Randy, but it bounced, said "bad address".

> tach resumed its flakiness

>You just found mechanic's trick #187; watch the tach. Tis a quick, rough,
indication to fuel or spark problems.
> Randy
   randy@taylor.wyvern.com

Aha!! A hidden gem amongst all the MG-TR chit-chat.
My patient is a 74 XJ12 with Lucas Opus ignition module. Hard to start, as if
firing on only one or two cylinders, but once it starts it idles ok and revs up
high. Tach is FLAKY. Indicates 600 rpm idle, but much lower than the actual rpm
when revved up. I suspect the Opus is on the way out. Any way to tell before I
spend the mega$$$? Any thoughts?

Thanks in advance.   Rob




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