(10-07-2018, 01:08 PM)bashbarnard Wrote: Old f*cking wives tail that. I've never had an issue and I've been doing it since I've been in the trade [emoji23]
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It's f*cking not an old wives tale. Stop telling anyone it is, go plug in Peugeot planet into any Piezo system and note the FIRST thing it says. NEVER remove an injector plug when the engine is running.
Solenoid injectors you'll usually knock out two cylinders, and are likely to damage the injector driver. They are driven with 80VDC and charged by pulsing the coil of the other injector it's paired with, which if active is likely to draw a pretty big arc and send the current through the roof and destroy the driver. You've just been lucky you've never hit it when the injector is on.
Piezo systems like the Siemens 8v HDis etc, if you remove the injector plug when it's running and catch it with it on, it cannot turn off. Go read about how Piezo systems work and you'll understand why, if the electric field is removed with the injector in it's open state, it will hold the injector open and not close, emptying the entire contents of the rail through that injector.
You've only ever been lucky doing it to not unplug it when it's active. Seen what happens when it's been done on both, usually destroys the piezo injector and ecu, solenoid units usually just kills the driver in the ECU. Yes, it's unlikely you hit it, but the chance isn't worth it.
