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[JamesV6CDX]

Every 40 miles or so, I get a fault code, DPF low effeciency.

Not sure that can be, given it's empty!!

When it does this, it over fuels, and stinks like a bad bbq

I fear I may just fit a pattern DPF 

Thought you'd ordered a new dpf?

No you're misreading. I said I'd ordered a new "DPF Back" exhaust, meaning everything behind the DPF

[STEMO]

Ah, I see. Thought it was already decided that it needed replacing or software remapped.

[JamesV6CDX]

Ah, I see. Thought it was already decided that it needed replacing or software remapped.

It was. Just haven't pulled my finger out!

If I was going to keep her, I'd try be tempted to try and fudge the sensors somehow. But, I anticipate in a few months, I will sell her on in order to buy a bigger and better project... and I wouldn't sell it without a DPF, and risk the new owner running foul of MOT rules

[Andy B]

Ah, I see. Thought it was already decided that it needed replacing or software remapped.

It was. Just haven't pulled my finger out!

If I was going to keep her, I'd try be tempted to try and fudge the sensors somehow. But, I anticipate in a few months, I will sell her on in order to buy a bigger and better project... and I wouldn't sell it without a DPF, and risk the new owner running foul of MOT rules

Would you not be better with a used OE DPF? 

[Marks DTM Calib]

Ah, I see. Thought it was already decided that it needed replacing or software remapped.

It was. Just haven't pulled my finger out!

If I was going to keep her, I'd try be tempted to try and fudge the sensors somehow. But, I anticipate in a few months, I will sell her on in order to buy a bigger and better project... and I wouldn't sell it without a DPF, and risk the new owner running foul of MOT rules

Good luck here, unless your good at automotive electronic design and sw programming 

[STEMO]

Ah, I see. Thought it was already decided that it needed replacing or software remapped.

It was. Just haven't pulled my finger out!

If I was going to keep her, I'd try be tempted to try and fudge the sensors somehow. But, I anticipate in a few months, I will sell her on in order to buy a bigger and better project... and I wouldn't sell it without a DPF, and risk the new owner running foul of MOT rules

Would you not be better with a used OE DPF? 

I certainly wouldn't consider a used dpf. They have a life span even when treated right, and you'd have no idea how it had been used. Quite a few drivers don't understand it's purpose or even what a regen is.

[Andy B]

.....
I certainly wouldn't consider a used dpf. They have a life span even when treated right, and you'd have no idea how it had been used. Quite a few drivers don't understand it's purpose or even what a regen is.

I see what you mean but cost dependant it might have been an idea rather than shell out £££££s for a new pattern DPF

[Marks DTM Calib]

About £200 for a pattern DPF on an Astra, think there are two types dependent on the exhaust fixing (slotted or drilled hole).

Sadly, the original DPF was probably ok and just needed a regen

[Raeturbo]

Can you buy a used one and clean it before it’s put on?

[Andy B]

....

Sadly, the original DPF was probably ok and just needed a regen

Is it possible to do something with a DPF when it's off the car? 

[STEMO]

....

Sadly, the original DPF was probably ok and just needed a regen

Is it possible to do something with a DPF when it's off the car? 

Plenty of companies will squirt a magic solution through it for you. But why bother when £200 buys you a cheap replacement?

[Andy B]

....

Sadly, the original DPF was probably ok and just needed a regen

Is it possible to do something with a DPF when it's off the car? 

Plenty of companies will squirt a magic solution through it for you. But why bother when £200 buys you a cheap replacement?

Is the cheap pattern worth fitting? They say that pattern cats are crap so are pattern DPFs any better?   
I really meant,  was there anything off the shelf you could buy to sort it DIY?

[STEMO]

....

Sadly, the original DPF was probably ok and just needed a regen

Is it possible to do something with a DPF when it's off the car? 

Plenty of companies will squirt a magic solution through it for you. But why bother when £200 buys you a cheap replacement?

Is the cheap pattern worth fitting? They say that pattern cats are crap so are pattern DPFs any better?   
I really meant,  was there anything off the shelf you could buy to sort it DIY?

Not that I know of. If you pay £200 for a cheap dpf and it lasts 3 years, I'd say that was ok.

[STEMO]

Don't know how many miles James' astra has done, but there are plenty for sale with over 100,000.

[Marks DTM Calib]

....

Sadly, the original DPF was probably ok and just needed a regen

Is it possible to do something with a DPF when it's off the car? 

Yes, it is possible to fully clean and de-ash a DPF, its been done for years on commercial vehicles 

.........and its more than just squirting a fluid through, it involves ultrasound, reverse flushing and special solvents