Author: HugaKugaSubject: ALL Mk1 engine management & DPF issues & info
Posted: 07 Dec 2015 at 9:24pm
vkouroub wrote:
..... Should i replace the DPF sensor or check those flexible tubes of the sensor for any condensate? Should i use one of those DPF cleaning liquid products?Also please explain to me how the regeneration of the the DPF filter works. Is it automatic? Can i simply clean the DPF filter manually? Sorry for all the dumb questions. Just trying to learn the car and solve this problem. Best regards, Billy |
Hi Billy - welcome to the forum
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There are a few things it could be (and you have listed them)
Blocked "plastic tube" - this is used to sense a pressure difference so if blocked (with gunk or ice...) can give a wrong reading
DPF sensor - yes could be this (if not the pipe) ...
Diesel Particulate Filter - it's a very fine metal filter that captures soot, then every 500 miles or so, the car will sense a pressure difference, and it allow fuel to go through the engine on the exhaust stroke (I think) which will then burn in the exhaust, heating it up to burn off the soot ... this happens at ~3500/4000 rpm you'll smell "warmth" round the back of the car (but it is normal).
This is why diesels aren't generally so good for doing lots of short trips...
The DPF can get blocked with particles that aren't carbon soot but some other "ash" that won't burn off at the elevated temperature .. this is when you might need to give the DPF a clean (I think that some have removed the dpf from the car and used Oven cleaner and a pressure hose ...)
Some diesel cars have a chemical additive that is injected into the fuel which actually reduces the burn temperature of the soot produced. This isn't the system on the Kuga