Smokey Dispatch Mk2

[AnthonyExeter]

hi, just bought a 57 plate 1.6 dispatch.
its very smokey when accellerating under load, not so much in neutral.
MAF reading on torque pro is 7-8 g/s at idle, seems quite high or is that in gthe right range?

thanks in advance

[Peter.N.]

Could just be a build up of soot in the exhaust, otherwise a restriction of air supply, possibly the filter or a collapsed pipe.

Peter

[AnthonyExeter]

would that cause an elevated MAF reading? or is that MAF reading in the correct range?

Driven for a couple of hundred miles now trying to keep the revs high to clear the exhaust but still the same.

[GiveMeABreak]

What's your VIN - so we know exactly what engine and options are fitted.

[AnthonyExeter]

VIN VF7**************[VIN obfuscated, can be read by forum staff]

[GiveMeABreak]

Ok, I wanted to check whether this has a particle filter or not - and it doesn't, so at least you know it hasn't been tampered with.

So you have a DISPATCH III SHORT PANEL VAN H1 TYPE 10 1.6 HDi 90 (DV6UTED4) Manual gearbox 5.

The next thing I would suggest is you get it read preferably with a Lexia and post the fault codes up here, then we might be able to give you some pointers.

[AnthonyExeter]

Yeah, all that is correct. Getting 2 fault codes, P0101 and another that i can't remember at the moment which appears to be related to glow plugs. I'll read it again tomorrow or may try and get it tonight if i can drag myself out again.

Oh, is it a Dispatch III? I thought the 2007 was a Mk2

[AnthonyExeter]

Update time
Picked up a used MAF sensor to try and it's giving the same reading as the original but after disconnecting the MAP sensor and Boost? sensor connections and giving a squirt of contact cleaner I still have black smoke but the P0101 code has gone to be replaced with "Pending P0299"
Now the van has plenty of power so hoping it's not the turbo. I did drive with torque pro reading out manifold pressure, boost and MAF
the manifold pressure didnt move much, how much variation if any should i be getting with this?

[GiveMeABreak]

I’m out at present so will look into those codes when I’m back in a few hours.

[AnthonyExeter]

Thanks, hoping its just a sensor issue as it drives ok apart from the belching smoke when accelerating. once at constant speed its fine.

[GiveMeABreak]

Ok back from the dentist

P0299: Turbocharger pressure signal: Pressure too low in relation to the reference value. Difference negative for 5 seconds, between the turbo pressure reference and the measured turbo pressure: The pressure measured is lower than the reference, around 300 mbars for an engine speed above 2500 rpm.

Triggering of Fault:

• In particle filter regeneration with engine speed above 1800 rpm
• Not in particle filter regeneration with engine speed under 1500 rpm

Disappearance of Fault: Driving for 5 min with several full load accelerations for 10 seconds.

Downgrade Modes Whilst Fault is Active:

• Use of the flow calculated.
• Cutting of the EGR butterfly (turbo air cooler), EGR valve and bypass butterfly (inlet air heater) in all operating modes.
• Cutting of cruise control.
• Change to "easy move" torque invalid (Deactivation of automatic mode for the electronic parking brake).

Symptoms:

• Lack of power
• Noise
• Smoke from the exhaust

Suspect Areas:

• Air meter restricted
• Clogged air filter
• Obstacle obstructing the air passage
• Air lock between compressor and engine
• Turbocharging pressure sensor
• Turbocharger position copy sensor
• Vacuum problem
• Variable geometry of the turbocharger jammed in the "minimum turbo" position
• Faulty turbocharger

P1351: Pre-heating relay circuit: Coherence - Relay is supplied and glow plugs not supplied. The information from the preheating control unit indicates that the relay is open even though the ECU commands the closing of the relay for 2 seconds.

This fault is pretty common and I would focus on the other issue at present...

[AnthonyExeter]

Yeah, not worried about the glow plugs, starting is spot on and not an issue. When driving the MAP was reading 14psi idle and up to 18psi driving, does that sound about right? i thought there would be more movement on that range.

[GiveMeABreak]

That is something only a decent diagnostic will do like Lexia / Diagbox - that shows live data against reference values. I think PSA refer to this as the Inlet Air Pressure Sensor which is incorporated into the Butterfly Double Air Metering unit.

[AnthonyExeter]

Would that be the 4 way body with 2 sensors in it coming from what i presume is the intercooler. might pop them out tomorrow and give them a clean.

[GiveMeABreak]

Edit: This is not the correct doser for this engine variant - the DV6UTED4 has a single doser and is without DPF - I just put this up as an example to show where the Air pressure sensor is and if applicable the Air pressure temperature sensor.

Reference	Designation
G	Turbocharged Air (Hot Air)
H	Output: Turbocharged Air to the Air/Air Heat Exchanger
J	Input: Turbocharged Air Cooled by the Air/Air Heat Exchanger
(24)	Inlet Air Temperature Sensor
(25)	Inlet Air Pressure Sensor
(26)	Inlet Air Heater Throttle (Hot Air Meter)
(27)	"EGR" Throttle (Cold Air Meter)