i own a small engine repair shop will it tell if the coil is misfiring on a single or twin cylinder engine

Yes, it will tell you if the out put voltage is varying. A very useful tool for a small workshop. It senses the voltage indirectly via the spark plug, or a coil lead to a distributor cap.

1. For a car, does this work on only 1 cylinder at a time? 2. Does it have the range so it can this be used in the cockpit while test driving?

1. Only one cylinder at a time, especially if you want to use the ignition condition checking mode.2. The range can be up to about 500mm, depending on interference, on a single cylinder engine such as an outboard or a golf car. however, it needs to be a lot closer for a multi cylinder engine.

will this work to check rpm on small house gen?

First, I bought the TA100 after an extensive search primarily to accurately check idle speed on my 2 & 4 cylinder motorcycles. It works perfectly. There is a setting for single cylinder engines so the answer is "Yes". Very well made with quality hard case.

Does it check for coil resistance output. Could it tell me if the ignition coil is good or bad?

Basically it checks ignition voltages. It will tell you what voltage each spark-plug has before it fires. It will tell you what voltage the ignition coil is putting out. It will give you RPM for any size engine:- chainsaw to V8 etc, but you will need a multimeter to measure resistance. Simple faults like broken coils can be determined by simple test gear. This instrument is for the devious faults. Mark

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GTC TA100 Smartach+ Wireless Ignition Analyzer and Tachometer by General Technologies Corp

Product ID: 2557382

Details

Brand
GTC
Item Weight
1.55 Pounds
Material
Plastic Steel
Number of Items
1
Thread Type
1/4-32 Unf

⚡0-50,000V spark plug voltage range

📟200-20,000 RPM on crisp 4.5-digit LCD

🔧Supports 1-12 cylinders & multiple engine types

SAR 886

Duties & taxes included

In stock

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Description

⚡ Diagnose like a pro, ignite your engine insights!

DURABLE PORTABLE KIT - Comes with rubber holster, hard padded case, and battery included—ready for on-the-go professional use.
PRECISION RPM MEASUREMENT - Accurate 0.05% microcontroller tech delivers RPM readings from 200 to 20,000 on a clear 4.5-digit LCD display.
LIGHTNING FAST DIAGNOSTICS - Special antenna sensor hooks up instantly to spark plug & ignition coil wires for rapid testing.
UNIVERSAL ENGINE COMPATIBILITY - Works seamlessly with DIS, conventional, magneto, and most spark ignition systems—1 to 12 cylinders included.
SPOT MISFIRES IGNITION ISSUES - Compare spark plug voltages cylinder-by-cylinder to quickly identify non-starts, fouled plugs, or damaged wires.

The GTC TA100 Smartach+ is a cutting-edge wireless ignition analyzer and tachometer designed for professional-grade engine diagnostics. Featuring a proprietary antenna sensor, it measures spark plug voltage up to 50,000 volts and RPM from 200 to 20,000 with 0.05% accuracy. Compatible with 1-12 cylinder engines and multiple ignition systems, it enables quick detection of misfires and ignition faults via a sharp 4.5-digit LCD readout. Packaged with a rugged holster and case, the TA100 is the ultimate tool for millennial managers demanding precision and efficiency in automotive troubleshooting.

Specifications

ASIN	B000RT9BH2
Best Sellers Rank	#819,473 in Automotive ( See Top 100 in Automotive ) #338 in Automotive Tachometers
Brand Name	GTC
Customer Reviews	4.5 4.5 out of 5 stars (155)
Global Trade Identification Number	00833303000190
Included Components	TA100, Rubber Holster, Hard Padded Case, Alkaline Battery, User's Manual
Item Weight	1.55 Pounds
Manufacturer	General Technologies Corp.
Material Type	Plastic, Stainless Steel
Model	TA100
Part Number	TA100
Set Name	Black with Red
Thread Style	1/4-32 Unf
UPC	833303000190 013317021576 999993048475
Warranty Description	1 YEAR, EXCLUDING BATTERIES

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