[T3] Timing Light

[donrob at yachtsales.com]

Try powering the light from a spare battery not hooked up to the car.

On 2017-07-13 22:58, Daniel Nohejl wrote:
> Here’s a weird one: I went to use my timing light today to verify a
> few things and something strange happened. As always, I hooked the
> light up to the + side of the coil and grounded it where I always do.
> Suddenly, the engine started misfiring every few seconds and I
> couldn’t get any accurate readings.
> 
> The light has the capability to read dwell, voltage, timing/advance,
> and rpm and the only sane reading I could get was of the dwell. The
> idle speed numbers were way off, the voltage danced around, and the
> timing was impossible to read b/c of the misfiring. As soon as I
> disconnected the light, everything went back to normal. Hooked it back
> up and the misfiring started. Disconnected the light and all was fine.
> Rinse and repeat.
> 
> So before I hit up a FLAPS to buy a new timing light, is it possible
> that the light is exposing some latent issue in my ignition system or
> does this sound like an open and shut case of a timing light going
> bad?
> 
> FWIW, this is the light. I’d been burned on cheap lights before
> (inductive pickup stops reading, wires crack, etc.) so I shelled out
> for this one and, well, probably got burned after a year of use:
> 
> https://www.amazon.com/INNOVA-5568-Pro-Timing-Light-Tool/dp/B000EVU8J8/ref=cm_cr_arp_d_product_top?ie=UTF8
> 
> 
> 
> 
> 
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