1.4hdi black smoke.

Ok so after a run to Manchester from Salisbury and back it's become apparent my exhaust is kicking out a lot of black smoke on acceleration or when loaded going up a hill. It also feels somehow a bit gutless compared to how it used to be.

Reading up it looks like this is likely injector issues. The car is 1.4 16v hdi on approx 105k miles with little service history. So it looks like a good place to start looking.

Lexia shows the usual (for my car) egr vacuum solenoid fault - but my egr was blanked off and shows no changes. No other ecu faults.

I've ordered a leak back testing kit to identify any mechanically bad injectors - that should be here within a few days. But I was wondering about electrical.

How does one check the electrical side of injectors? I'm confident with a test lamp and multimeter so I'd like to check this all out before splashing the cash on any suspect injectors.

My garage steered me right. Seems I've a spit intercooler pipe which should be available in the next day or two. But I'm still curious about testing the injectors electrically

SpudGun wrote: ↑Mon Apr 15, 2019 5:59 pm My garage steered me right. Seems I've a spit intercooler pipe which should be available in the next day or two. But I'm still curious about testing the injectors electrically

Don't mess around with the injector/ECU electrics.

Go for the leakoff test to see if you have worn or damaged injectors considering the lack of service history there may be no fuel filter water drains or changes.


If you want to have the injectors electronically tested, you can send them off for a test to somewhere like here and they get tested properly and safely.

I have no intention of "messing around" with the electrics on my injectors.

However there must be a way of testing the electrical side of the injectors. Faulty wiring such as an open circuit, or incorrect voltages must be testable.