the Vauxhall astra had an egr fault that Vauxhall could not fix so that fitted
a blanking plate and removed the egr valve and took it out of the ecu
and they pass the mot
the mot tester will not know if the egr is blanked off if you don't tell him as in most cars you cant see with out taking covers off the engine
and all they do is a smoke test. been in the car trade & a mot tester for many years and egr valves are a problem ith lack of power and black smoke
and blocking the intake with black crap

If this was facebook I would be putting a like and a big smiley face shotgun , have never needed to blank off an egr on anything keep em clean keep it well serviced and drive it right , everyone jumps on the egr first as that's what the code says , no one thinks to look at the maf though after all that's what measures the egr flow

shotgun said:

the Vauxhall astra had an egr fault that Vauxhall could not fix so that fitted
a blanking plate and removed the egr valve and took it out of the ecu
and they pass the mot
the mot tester will not know if the egr is blanked off if you don't tell him as in most cars you cant see with out taking covers off the engine
and all they do is a smoke test. been in the car trade & a mot tester for many years and egr valves are a problem ith lack of power and black smoke
and blocking the intake with black crap

Click to expand...

I'm driving a 2013 Fiorino and have done 35k miles since June (2013). About 8000 miles ago the EM light came on and after some time I took it in for a check. The guy told me there was a pressure disparity before and after the DPF indicating it hadn't regenerated (?). The associated error message I get every startup is that the Start/Stop is disabled. Garage man says that's due to the errors in back pressure in the DPF. He cleared it, I left and I stopped about 2 mins later before setting off on a long trip (took it in with a cold engine). Errors back again.
I went back to the garage about a week later and asked advice. This time the car was hot so he cleared the code again and suggested a motorway blast between junctions (only 5 mins to the M180) to burn off the DPF collection. Great, started off, no error. Before I reached the turning to the motorway I activated the Stop/Start as I knew I'd have to stop to turn (usually 'off' as I do not like it). I got to the stop, the error returned. I did a 5 mile blast there then back again at up to 85mph. Good enough? No change because the error message was there so perhaps I didn't think it would clear itself.
I'm now waiting for 40k to book a service and hope it will be sorted. The garage man did say he could force a regen - how is that done when the DPF is just a thing in a can with no electrical connection (correct me if I'm wrong). He also advised that the DPF can be removed and the can sealed up again to revert to a better way as there is a visual check done for the presence of the DPF holding device and a smoke test at the rear though someone on here said it's an MOT fail if it should be fitted and isn't there.
Do you think the EU in their doubtful wisdom actually fitted a trial DPF to anything to do a time/mileage test to see what happened with a soot build up and the complications that arise?
The EGR seems to cause issues, the DPF the same yet they're fitted and we have to put up with yet more intervention but we're the cash cow paying to fix any problems arising from enforced legislation which didn't seem properly tested before it became a requirement.
If something like a DPF is fitted to help reduce pollution, why are you told to drive like an idiot every so often to burn off (for which read 'expunge the pollutants from a container into the atmosphere') to make it function properly or you get a stack of error messages and the car may not run correctly or go into limp mode or cease running altogether?

Sorry for the long post just wonder if it covers the issues discussed in both these similar threads.

R-V-M

Just a thought........................is there any connection at all with 'quality' of fuel used, or 'quality' of engine oil used.
Mine has the genuine fiat specd engine oil, installed (poured in) by my main dealer......and I refuse to use supermarket diesel.
Probably a silly thought......but hey ho.
Cheers Qube O.

The first thing I would be doing is checking the pressure sensor on any car with a dpf they are really prone to playing up on all marques of vehicle
A blast at high speed was fine for pre dpf vehicles to "give them a clear out " but with a fault logged for the system it won't regen I'm afraid .
A forced regen may clear it or may not think it needs to go on some more advanced kit tbh
As for fuel wouldn't say that makes much difference but oil really does it has to be a low saps oil of the correct spec
Don't know if I'm allowed to do this but a product to use is called powermax dpf power clean you add it to the tank every 6 months and it lowers the ash and soot burn off temp to around 250 deg so they stay clear in normal driving the company that sells it it called duxback