Hi there. I currently drive a mk3 1.6s Diesel which is used as a taxi. If I drive 80 miles per night (mixed driving, not all town) my car regens  approximately four times every time is this about right or is it far too much. Could it be a blocked DPF or a faulty injector

 

many thanks. Tony

Sounds very frequent.

High mileage on the odometer? 

High loading of oil ash making it 'full' of soot as judged by the pressure sensing even though not much has actually arrived; probably. 

There's probably someone at your work who knows a garage that can perform a DPFectomy for about 1/8 the cost of a new part.

Ok thanks. Car has done 100k. Do you think it would be worth trying a bottle of dpf cleaner or would it need something like a terraclean?

 

thanks 

Also forgot to add car is sluggish on pull away until Revs reach about2k. Never had a diesel car that has done this before. 

1 hour ago, Noname1300 said:

would be worth trying a bottle of dpf cleaner

Which goes in the fuel tank yes? So how does it get to the DPF in the exhaust system? (other than slowly and burnt)

2 hours ago, KenONeill said:

There's probably someone at your work who knows a garage that can perform a DPFectomy for about 1/8 the cost of a new part.

Which is illegal to drive - and an MOT fail

Edited 13 September, 20214 yr by bigjohn

Only way is dpf out and clean or replace. Just be double sure that's the issue. Likely from your description though.

I would get a DPFclean done ASAP - as it sounds like you have a blocked DPF.  There are several in Portsmouth that you might want to have a look at.  My personal recommendation is that you look at: https://www.hydra-int.com/diesel-particulate-filter.html

or for longer term usage (after you have had your DPF cleaned): https://www.hydra-int.com/diesel-power-blast.html

 

9 hours ago, bigjohn said:

an MOT fail

Not if it's done right, since the only way to detect it is to dismantle the exhaust system.

I can't imagine any in-situ 'snake oil' type treatments having any impact whatsoever if the problem is oil ash accumulation.

I'm with @MarkyG82. First get the diagnosis done in case we're wrong (100k doesn't seem particularly high mileage but maybe wrong oil has been used at some points in history?); then if confirmed do it properly by removing, professional cleaning and refitting.

 

I would get the car plugged in and DPF levels checked and some live data logs, four times a night is far to frequent. 

If you have a faulty pressure sensor and you leave it, you will do more damage than good.

 

You don't want to spend over £500 to replace the DPF if the issue is being caused by a sensor.

The problem is with DPF's they do not like short trips, especially on a cold engine.

As others have said, in-tank fluids are not worth it, you need to remove the DPF and use a proper cleaner.

 

If you can get the car on the motorway more frequently, that would help you a lot, otherwise it may be worth considering an alternative petrol vehicle.

I have a client that is a taxi driver, one has made the change from diesel to petrol due to local emissions zones and finds the running costs are less.

 

 

Ok. Many thanks all. Looks like it’s off to the garage to be plugged in 🙄