What causes a bad injector?
Fuel injectors will fail when debris (water, dirt particles, etc.) or rust find their way into the system and, after time, plug up the nozzle, the armature, or the nozzle needle gets stuck. You should also consider fuel additives designed for stabilizing the fuel in your system.
How many ohms does a high impedance injector have?
High impedance injectors are the most common found on cars these days. They will range from 12 to 17 ohms. Low impedance injectors are found on high performance and larger injectors. They have much lower resistance, typically around 2-5 ohms. Step 5: Repeat with all injectors. They should all have a resistance within half of an ohm from each other.
How to check fuel injector resistance with a multimeter?
Learn how to check fuel injectors to make sure they are working. You use a multimeter on the resistance settings and measure the ohms of the injector. All injectors should be within .5 ohms of each other. If an injector is out of the resistance specification, that injector is bad.
What are the symptoms of a bad fuel injector?
If an injector is out of the resistance specification, that injector is bad. Symptoms of bad injectors are a check engine light with codes P0300 through P0308, misfiring, hesitation, poor fuel economy, stalling, and a poor idle. Using a Screwdriver to test fuel injectors (EASY):
Can a shorted injector affect a car engine?
A shorted injector can hinder the injector driver operation for additional injectors, unplug all injectors and re-test the signal. If pulse returns plug the injectors back in one at a time until the pulse fails then replace the shorted injector.
Can a failed fuel injector have the same ohm value?
Operational fuel injectors will have the same, or very similar, Ohm values. A failed injector will have too little or too much resistance and the Ohm value will be widely different than the other readings. Replace the injector if the Ohm value is significantly different than other injectors.
High impedance injectors are the most common found on cars these days. They will range from 12 to 17 ohms. Low impedance injectors are found on high performance and larger injectors. They have much lower resistance, typically around 2-5 ohms. Step 5: Repeat with all injectors. They should all have a resistance within half of an ohm from each other.
Learn how to check fuel injectors to make sure they are working. You use a multimeter on the resistance settings and measure the ohms of the injector. All injectors should be within .5 ohms of each other. If an injector is out of the resistance specification, that injector is bad.
If an injector is out of the resistance specification, that injector is bad. Symptoms of bad injectors are a check engine light with codes P0300 through P0308, misfiring, hesitation, poor fuel economy, stalling, and a poor idle. Using a Screwdriver to test fuel injectors (EASY): https://www.youtube.com/watch?v=tA_E6…