[TR] Electrical Gremlin

[Keith Richard Stewart]

TERRY SMITH wrote on May 29, 2019 9:37 PM
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TR3 engine starts and runs, then flutters and, now, dies.  I've been through the fuel system completely, short of a magnet in the fuel tank, which I might try.  Completely disassembled the carbs again today.  Jets centered, float bowls have no gas in them, float valves perfectly adjusted, and the puff test shows they stop flow as they should.  Mixture and idle is right.  Not to mention I tried a complete swap out of these carbs (rebuilt by Quantum Mechanics some years back).  

I've tracked wiring through the system.  I thought a partial open (broken wires) at the lighting switch where it feeds the ignition switch would fix it.  Didn't.  Replaced the 60 year old ignition switch. Didn't fix it.  Double checked the fuse holder for solid and clean connections.  Not the issue.  When it does run, the voltmeter (not ammeter) shows just the 12 volts from the battery, and not a charge.  White wire from the fuse to the coil tests no short to ground, and bypassing it with another connecting wire doesn't cure the problem either.  
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Symptoms seem similar to a problem we had in my wife's TR6. Do you have a spare coil to swap in? That was her problem. Previous owner had an engine rebuild and the rebuilder put back in a 40+ year old coil. Replacement coil and tight connections were an easy fix.


Keith Stewart
keithstewart at bell.net