Mark,
This a long shot but... if you have HS6 SUs.... are the damper reservoirs
topped up.
Brian Sanborn
1962 TR4 - CT16260L Groton, MA
sanborn@net1plus.com
-----Original Message-----
From: Mark Clark <clarkm@oit.edu>
To: triumphs@autox.team.net <triumphs@autox.team.net>
Date: Friday, August 13, 1999 3:22 PM
Subject: Poor Running from My TR-4 - Advice, please
>
>Okay, here are the symptoms:
>
>The car ran well last summer. No engine work over the winter. It has been
>running poorly this summer.
>
>Engine starts with no problem. Idle is reasonably smooth. When driving,
>it feels like the engine goes down on power (hesitates) every so often - as
>if it was not getting enough fule intermitantly. It does not stall. The
>hesitation comes on both acceleration, steady cruising, and when I take my
>foot off the gas. The hesitation is random, and occurs fairly often - no
>more than twenty-thirty seconds go by between hesitations, and they
>normally come more often. Pulling out the choke makes no difference.
>
>Here is what I have done:
>-checked valve adjustment and compression - both fine
>-gapped plugs
>-checked and tightened all ignition leads and connections to the coil and
>distributors
>-replaced points with electronic ignition - no change in symptoms
>-adjusted carb float levels
>-carbs were rebushed several years ago - no air leaks
>-mixture needles were replaced last year and the car ran fine after that.
>-carbs adjusted and syncronized with Unisyn and the clear spark plug jobbie
>I can't remember the name of
>-checked timing
>-got a new tank of gas and added gas additive to dry and clean gas
>-replaced fuel filter
>
>I suspect an electrical problem. Distributor cap, rotor, plugs, and plug
>wires have all been replaced in the last several thousand miles. The only
>electrical device that has not been replaced is the coil, a Lucas
>high-voltage unit.
>
>1) Could it be the coil? Can I do any tests to see?
>
>2) Anything else I should check?
>
>Thanks much - look forward to your reply.
>
>
>
>Dr. Mark Clark
>Oregon Institute of Technology
>
>
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