1.4hdi black smoke.

Questions specifically about a Diesel powered C3 (usually engine or fuel related problems)
Please provide as much description including adding photos directly to the topic or videos you have uploaded via youtube as possible.
Forum rules
One question per topic.
No Gearbox questions
Diesel engine related problems
Think: Diesel engine, diesel fuel system, diesel injectors and glow plugs
My Name: SpudGun

Contributor
Posts: 20
Joined: Wed Jan 02, 2019 3:31 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 116000
Trim Level: SX
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Been thanked: 1 time

Post

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 Name: SpudGun

Contributor
Posts: 20
Joined: Wed Jan 02, 2019 3:31 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 116000
Trim Level: SX
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Been thanked: 1 time

Post

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
My Name: Citroen-Driver

C3 Master
Posts: 212
Joined: Mon Dec 18, 2017 12:10 am
Model: C3 Pluriel - with or without roof
Year: 2003 (53)
Engine Size: 1.6 (16v)
Fuel Type: Petrol
Mileage: 30000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: ET3 16-valve (90 PS)
Has thanked: 35 times
Been thanked: 38 times

Post

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.
My Name: SpudGun

Contributor
Posts: 20
Joined: Wed Jan 02, 2019 3:31 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 116000
Trim Level: SX
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Been thanked: 1 time

Post

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.
  • Similar Topics
    Replies
    Views
    Last post