The 7 Best Timing Lights

Updated September 21, 2017 by Daniel Imperiale

7    Best Timing Lights
Best High-End
Best Mid-Range
Best Inexpensive
We spent 45 hours on research, videography, and editing, to review the top options for this wiki. If you want to make sure your vehicle is running as efficiently as possible, you'll need to check the timing of the spark in relation to the piston with one of these timing lights. We've included budget-friendly models good for home or occasional use through to professional-grade units that can stand up to the rigors of a busy automotive shop. When users buy our independently chosen editorial picks, we may earn commissions to support our work. Skip to the best timing light on Amazon.

7. MSD Ignition 8992

The MSD Ignition 8992 would make a great addition to the arsenal of any dedicated mechanic. Its intense strobe is easily visible even in daylight, and it will last for years of daily use. Its major drawback is price, as similar units sell for much less.
  • works with multiple power sources
  • detachable inductive pickup
  • no advance settings
Brand MSD
Model 8992
Weight 1.9 pounds
Rating 3.6 / 5.0

6. Actron CP7527 Inductive

The Actron CP7527 Inductive is a low-cost, but reliable, way to make sure that your engine is firing properly. Its one-touch on/off control is exceedingly simple, so use it on everything from a Lexus to a lawnmower with confidence.
  • plated abs exterior
  • super-bright xenon flash
  • one-year warranty
Brand Actron
Model CP7527
Weight 1.8 pounds
Rating 4.0 / 5.0

5. PMD Products Xenon Spark Checker

With its comfortable pistol grip, the PMD Products Xenon Spark Checker makes it safe and simple to aim your light right at the target. It also features a 60-degree advance dial on the back so you can fine tune your engine with ease.
  • trigger activation
  • durable abs housing
  • not the brightest option
Brand PMD Products
Model 6083
Weight pending
Rating 4.4 / 5.0

4. ESI 125 Digital Tach Advance

The ESI 125 Digital Tach Advance from Electronic Specialties is accurate with an engine spinning at up to 9,000 RPM, so for most shops or hobbyists, it will be more than suitable for engine diagnostics. Its digital interface makes it easy to set your advance.
  • detachable and replaceable cable set
  • suitable for marine use
  • bright xenon lamp
Brand Electronic Specialties
Model 125
Weight 1.9 pounds
Rating 3.9 / 5.0

3. Electronic Specialties ESI 130 Self-Powered

The Electronic Specialties ESI 130 Self-Powered is ideal for 2- and 4-cycle engines, as well as any ignition system. It's accurate all the way up to 14,000 RPM, and its protective sleeve can withstand temperatures up to 1,200 degrees Fahrenheit.
  • 4-foot lead length
  • batteries included
  • made in the usa
Brand Electronic Specialties
Model 130
Weight 1.6 pounds
Rating 4.5 / 5.0

2. Performance Tool W80578

The Performance Tool W80578 derives its power from a pair of D-cell batteries, and its detachable pickup is incredibly easy to quickly hook up to start your reading. It will work on any gas engine, from your lawnmower to your motorcycle.
  • works with magnetos
  • robust build quality
  • strong feel in the button
Brand Performance Tool
Model W80578
Weight 11.2 ounces
Rating 4.8 / 5.0

1. Innova 3568 Digital

With the Innova 3568 Digital nothing is left to chance. Its split-screen digital LCD readout displays both tachometer and advance functions at the same time, so you know you're reading your engine just right, and its rotating barrel makes it easy to aim.
  • skip circuitry test up to 9990 rpm
  • folds down when not in use
  • protective hand guard
Brand Innova
Model 3568
Weight 1.5 pounds
Rating 4.9 / 5.0

Air, Fuel, and Spark

No, they're not a 1970s soul band, but they are on fire. Or, more accurately, you could say that together they cause fire. And if that fire happens under enough pressure, there'll be a violent explosion — and who doesn't love (safe and controlled) explosions?

Cars certainly love them. In fact, cars have been scooting down the road for decades now thanks to millions of little, tiny, violent explosions happening in quick succession. They comprise the most energetic part of the internal combustion engine: the combustion itself.

But cars are big machines. If those little explosions pack enough punch to hurtle a two-ton vehicle down the road at 85 mph, there must be a pretty exact science to making sure that each of these ingredients is applied in the proper volume and at the exactly right time.

Fear not, because engineers have developed an intricate system of air/fuel/spark timing, ensuring that our trusty engine is getting its gasoline and oxygen meals at precisely the right intervals.

Don't Let The Mechanic Get The Best Of You

Sometimes, cars run strangely. Sometimes, they have rough idles or get choppy during a certain range of RPM. Other times, enthusiasts create customized vehicles, complete with specialized, high-performance engines. In all of these cases, it's absolutely worth making sure that your engine's timing is properly set, and a mechanic will charge you a minimum of $100 simply to offer a diagnosis. And that doesn't include labor. But timing is one test you don't necessarily need to have done at the shop. A simple and readily available tool, the timing light can enable you to check this integral setting on your vehicle from your very own one-car garage.

Let's slow down a bit, though. Opening the hood and inserting strange, flashing gadgets into the engine compartment can seem intimidating at first, especiaally to the non-gearhead. Don't worry; this isn't an involved process. It's worlds easier than, for example, a brake job. And just a couple more steps (again, relatively simple) let you adjust your engine's timing, making sure you don't have to take an extra, expensive trip to the automobile doctor just to address that cylinder that keeps knocking or misfiring at 4,000 RPM. Of course, to understand and adjust timing, it helps to have at least a fundamental knowledge of how an internal combustion engine works. While they look like big, complicated beasts, engines actually aren't so difficult to understand on a basic level.

As mentioned earlier, combustion happens in the presence of three things: oxygen, a fuel source, and a spark. In standard engines, this happens inside cylinders bored into the solid metal of the engine block. To start the process, the crankshaft pulls the piston away from the cylinder head, essentially the base of operations for combustion. Valves in the cylinder head open to allow air into the now voluminous cylinder while the fuel injectors spray a measured amount of gasoline or the mechanical carburation allows air-fed gasoline into the cylinder at a set rate. When the piston is at its peak distance from the cylinder head, the camshaft (a knurled rod, or sometimes two, running parallel to the crankshaft) lets the valves close. The piston then compresses the space, and the spark plug fires after the air/fuel mixture has been increased to as much as eleven times atmospheric pressure. Then, BOOM.

This fire under pressure, also known as an explosion, forces the piston outward. The piston rods propel the crank to rotate, the crank turns the flywheel, and then the motor's job is done and the transmission takes over.

The Miracle's In The Timing

The kicker here is that, because the power plant of a car is made of so many complex moving parts, the camshaft, crankshaft, fuel injectors, and spark aren't permanently connected in a fixed system. In reality, they operate as a series of components that manipulate each other mechanically, and some of these components can independently move slightly out of alignment. This throws the whole system out of whack. For that reason, cars are most often designed with one particular belt (or rarely, a chain) that attaches to every critically-timed part in the system at once, ensuring that every mechanical voice in the engine is at the same tempo for the entire symphony.

Sometimes, the timing belt is prominent in the motor, and in some setups, it must be removed before certain large jobs are done to the car or frame. It's commonly found underneath a few engine components. Because it's such an important part, most manufacturers recommend it be replaced every 60,000-100,000 miles. If a timing belt should break during use, the best-case scenario is that your car simply won't run until it's replaced. If a car uses an interference engine, meaning the pistons and valves occupy the same physical space in the combustion chamber but at different times in the firing process, a popped timing belt could very well destroy an engine beyond repair. Interference motors are very common, so it's important to give timing belts their proper due.

Using a timing light is actually very easy. Check your car's manual to learn which of the pulleys has the timing marks around it. Connect the light to your battery and clamp its signal wire to the number one spark plug. This plug fires when the piston reaches the maximum distance from the crankshaft, a position known as top dead center. When the timing light is aimed correctly, exact degree markings will become visible on the pulley, telling you how far advanced or retarded your engine's timing is relative to TDC. The distributor is easily adjusted to bring this figure in line with your car's specifications.

Remember, any dirty hands or cut knuckles you experience are a small price to pay for not getting fleeced by a mechanic.

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Last updated on September 21, 2017 by Daniel Imperiale

Daniel is a writer, actor, and director living in Los Angeles, CA. He spent a large portion of his 20s roaming the country in search of new experiences, taking on odd jobs in the strangest places, studying at incredible schools, and making art with empathy and curiosity.

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