OTC 3673 Diesel Glow Plug Tester

Product Information

Rough idling: when the combustion chamber can’t reach the right temperature, it may also result in rough idling once the car has started. Connect the two leads of the multimeter together, making sure the metal clamps/pins on the leads touch each other, and record the result. If you are using a digital multimeter, the precise reading will appear across the screen. At this point you may be able to use your multimeter’s calibration function to adjust the reading to zero. Rapid glow plugs have two coils internally connected in series, a small heating coil at the plug tip and a larger regulating coil within the plug case. These systems use Pulse Width Modulation (PWM) of the supply voltage to regulate the circuit current and to control glow plug temperature. Pico Technology accepts no responsibility for inaccuracies. Each vehicle may be different and require unique test If you provide content to customers through CloudFront, you can find steps to troubleshoot and help prevent this error by reviewing the CloudFront documentation.

glow plugs in 10 steps | DENSO How to diagnose faulty glow plugs in 10 steps | DENSO

easily and accurately test the condition of glow plugs without any adjustment, regardless of their voltage and material. If one or more of the glow plugs gives an unusually high reading, it should be replaced. However, we suggest that you replace every plug – not just the one that appears to be faulty!Phase 3: Post-heating. BERU glow plugs continue to be heated for approximately 3 minutes after the engine has been started. This extended glow plug operating time helps to complete the combustion process and to decrease noise output as the combustion chambers heat up. Auto Electrical Parts Natrad can supply and install a range of auto electrical parts for all vehicle types At its peak, the glow plug’s temperature could reach approximately 1,000 degrees Celsius. That guarantees the diesel or air mixture will explode even at low temperatures.

How to Test Glow Plugs | Garage Gurus

Working with an electrical system means safety should be paramount. Disconnecting the battery reduces the chances of getting caught in the current. 3. Disconnect the connector Disconnect the power cable from the glow plugs. If you don’t do this, your tester will be powering all the glow plugs instead of just one. Doing this will give you bad results, and may damage the tester. The simplest way to test glow plugs is with a clip on current clamp, either on supply wire to glow plugs or on engine earth, with glow plug light on you should see 15-20amps for each glow plug fitted, 4 cylinders would be approximately 60-80amps. Today, DENSO offers its product and engineering expertise to the aftermarket, including an all-makes, OEM-quality glow plug program. With fast heat-up times, long-lasting post-heat temperatures and excellent car parc coverage with a simple part reference system, DENSO Glow Plugs are designed to support the aftermarket in every way possible.

You can also test them with a ohm meter but you will need to disconnect each lead. They should all read about the same normally less than 5 ohm's, a failed plug will either be very high or open circuit. Applications include: Chrysler 3.0L CRD and Jeep 3.0L CRD; Mercedes Benz A Class, B Class, C Class, CLA, CLK, CLS, E Class, GL/M/S Class and Sprinter 2.1 CDI; Smart Forfour and Mitsubishi Colt. The main two ground points can be found by following the wire that leads from the negative battery terminal into the engine wall or following the wire that leads from the alternator into the engine wall. Again, you can consult the manufacturer’s handbook to find the exact locations of the ground points.

test Glow Plugs on diesel engine without removing them How to test Glow Plugs on diesel engine without removing them

Pre-heat: increases the temperature of the cylinder charge within the combustion chamber prior to start up. As soon as the glow plug temperature has stabilised after their initial activation, they will be switched via PWM to prevent overheating.Find resistance value of your multimeter. Cross the two leads of the multimeter over each other and record the result. Make sure the metal clamps of the leads touch each other. If you are using a digital multimeter, then the reading will appear across the screen. Located on the engine and with a direct connection to the engine control unit, the control module uses a microprocessor to analyse input from the engine control unit to determine information related to the working of the glow plugs. This includes when to switch the current for the glow plugs on and off, and how much current is required as this will differ depending on the starting temperature of the engine. The current to the glow plugs is turned on during the pre-heating to warm up the engine, stand-by time when the engine should be started, and post-heating to meet increasingly strict exhaust gas standards and optimisation of combustion processes.

Ask The Mechanic-Testing Glow Plugs

If one or more of your glow plugs is defective, it will allow diesel to leak into the exhaust pipe. As the exhaust heats up, the leaked fuel will burn and produce white exhaust smoke. This will only last for a few minutes after you start the engine. Most importantly, the ab tools-us pro glow plug tester comes in a blow moulded case for easy storage. Three-phase technology (Types GE & GN) – these glow plugs use three heating phases (pre-heating during ignition, heating during starting and post-heating for approximately 3 minutes after starting) to ensure diesel fuel is burnt more efficiently and quieter, so exhaust gas clouding is reduced by up to 40% during cold starting. They ensure reliable starts, time after time, even when the outside temperature is -30°C. Also, any plug readings of 5 ohms and above indicate that there’s a problem with the glow plug relay and must be replaced right away. Hard starting: this refers to a difficult to start car when you turn on the ignition. This could be due to damaged or old plugs, which results in too low a temperature to start the engine with.The reading on your digital multimeter must be at least 1 ohm for a good glow plug. Keep in mind that the actual reading might differ based on your engine’s temperature, the quality of the earth connection, the accuracy of the multimeter, and other factors.