So after the DPF and the sensor was replaced I went back to the Diagnostics place to get the car reset and all sorted.
On route the car dropped back into Limp mode but had hoped that when it was plugged in all would be well.
When it was plugged in the guy ‘ummmed’ and ‘arrred’ and then said that I should have opted for him to simply remove the DPF and remap my ECU as now I had a list of errors and that the car was basically knackered.
His advice was simply to go for a long drive to get the car to Regen itself as he could not get the car to do it. He took it out of limp mode but no more than 20 yards down the road it dropped back into it agian.
I went back and had a bit of a moan and then he said this...
"...well, the problem is... I dont actually have the proper gear to plug into an Alfa so from the start I have kinda been guessing at what might be the problem..."
He then told me he couldn’t do any more and that I should find a Fiat/Alfa garage who might be able to help.
He was lucky I didn’t knock the f@#*er out there and then.
So, I rang my most local Fiat place who said they didn’t have the right ECU gear to sort my Alfa but that they recommended the following place:
Mark at MWT Automotive Services in Lincoln.
I rang them and spoke to Mark who listened very carefully and then said bring it in.
Due to me needing a car he provided a free courtesy car for the 2 days he had it and it turned out that the issue was the EGR valve – not the mechanical bit but the electrical bit – which is why when it was taken off to clean out all looked ok.
There was no history of a pressure sensor error on the ECU and they simply told the ECU that a new DPF had been fitted and spent a bit of time re-fixing a few ECU errors the first Diagnostic place had caused and now the car is running just like it should. (They even said that had they got it sooner they might have been able to save my DPF and regen it before it was too late).
So Im finally smiling – although if I see that chap from the first Diagnostics place again he had better scarper quick sharp.
So for anyone who is interested (and I appreciate I may not be allowed to recommend/sell/not recommend etc. on here)
Mark at MWT Automotive Services
is one of the gaffers but before that he was the Head Tech for 15 years at the local Main Alfa and Fiat Dealer. Google them and you will find them.
[The other guy who did NOT solve my problem is Specialist Diagnostic Services in Stanley Street, Newark… Don’t bother googleing them.]
Thanks for the advice on the forum chaps and hope my little thread helps someone else out there.