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Macroblock · 07-18-2020

To check plug wires:

Method 1 is to use an inline spark plug tester. Test one lead at a time. Connect one end to the incoming HI-Tension lead, the other to GND (normally the other lead goes to the spark plug but this is likely not possible on the LT5 due to the deep plug shaft). The tester will light when high voltage comes down the wire as you turn the engine over. Available anywhere including Amazon. 2 testers cost under 25 dollars.

Method 2 involves removing one lead at a time and gently inserting a screwdriver completely into the boot of the HI-Tension lead (don't damage the connector). Place the driver over the plenum with about 1/4 - 1/8" of gap between the plenum and the metal part of the screw driver. Upon cranking, you should see a spark jump from the tool to the plenum.

BTW - Before buying any parts, this should have been your very first test. Let us know your results.

07-18-2020	#113
Macroblock Join Date: May 2020 Location: Windsor Posts: 40	Re: Ruff Idle ,Huge Loss of Power To check plug wires: Method 1 is to use an inline spark plug tester. Test one lead at a time. Connect one end to the incoming HI-Tension lead, the other to GND (normally the other lead goes to the spark plug but this is likely not possible on the LT5 due to the deep plug shaft). The tester will light when high voltage comes down the wire as you turn the engine over. Available anywhere including Amazon. 2 testers cost under 25 dollars. Method 2 involves removing one lead at a time and gently inserting a screwdriver completely into the boot of the HI-Tension lead (don't damage the connector). Place the driver over the plenum with about 1/4 - 1/8" of gap between the plenum and the metal part of the screw driver. Upon cranking, you should see a spark jump from the tool to the plenum. BTW - Before buying any parts, this should have been your very first test. Let us know your results.