OH dear!

After reading lots and lots about the EGR valve mod/blanking plate i decided to take a peek at the state of mine today!

What a shock i got the EGR was full and i mean full of black oily sludge see pic below (this is what i got out of the EGR Valve

Also took the inlet off and took a peek at this too and exacly the same results were found (full of crap) so i filled it with good old mr muscle oven cleaner to get rid of it (fingers crossed) then i will take it to my local jet wash and rinse it out/off see pic below full of cleaner....


Although i have also filled the EGR valve with cleaner i have decided to buy the blanking plate and do the mod as the engine was sucking in all this sludge
If you have a spare 30 mins or so take a look you just may be suprised at what you find!

Well done that man!

More proof, if any was needed, that the EGR does no good to the engine, and very little for the environment, if anything.

Hope you get your hands clean by Xmas.

Singvogel.

Did mine at the weekend, spent a long time cleaning intake manifold - it's pretty hard to get into some of the corners. BTW- I took the little rubber seals off cause I didn't know if Mr Muscle was rubber friendly - it's pretty potent stuff. I also unbolted the little sensor thing - what is that for btw?

i hope he can get his book clean LOL mine was like that the previous owner only did town work they need a good blast out

mattiker said:

Did mine at the weekend, spent a long time cleaning intake manifold - it's pretty hard to get into some of the corners. BTW- I took the little rubber seals off cause I didn't know if Mr Muscle was rubber friendly - it's pretty potent stuff. I also unbolted the little sensor thing - what is that for btw?

Click to expand...

What little sensor thing - pic needed, if possible.

S.

Its your MAP sensor.

What a way to treat a Haynes manual

Yer need to look after yer haynes manwell betterer. Yer gonna need it.

Think i might need it now,put everything back on the car including the cleaned EGR valve until my blanking mod comes.
however i have found a plug and for the life of me i cannot see where it goes and to make matters worse i can't remember unpluging it
the only plug i unplugged was the one on the left hand side with the wire clip.
here is a pic of said plug....

any help would be good.
gave the car a good run and it ran perfect with out issue?

Is it the old high pressure plug now replaced with new modified overlay plug?

Cleaned out EGR a couple of weeks ago and also found the plug/wire that can't be plugged in anywhere.
Not worrying too much as it doesn't seem to affect anything but I hope someone can shed a light on this...

nadjila said:

Cleaned out EGR a couple of weeks ago and also found the plug/wire that can't be plugged in anywhere.
Not worrying too much as it doesn't seem to affect anything but I hope someone can shed a light on this...

Click to expand...

Oh well that makes me a lot happier knowing that it's just not mine
thanks for the info

I can't remember my haynes manual ever looking that new .The cover is now held together with duct tape and the page edges are quite black.

Vissie said:

Its your MAP sensor.

Click to expand...

From my wikipedia research there is a page on MAP sensors which says this "A fuel-injected engine may alternately use a MAF (mass air flow) sensor to detect the intake airflow. A typical configuration employs one or the other, but seldom both"

So, perhaps it is something else. To clarify its a little sensor that bolts to the left had side of the inlet manifold - as already mentioned you have to unplug it to remove the manifold. If you look at Mings HowTo on EGR bypass then you will see the electical plug featured in his photo with Mr.Muscle foam emitting from the ports.

When I took mine off the sensor's end was all gummed with oily goo - I carefully remove the goo from the sensors hole using a pin before I replaced it. I removed it cause I figured that mr. muscle and flushing with water may not do it any good.

Cheers.

Matt

Sorry having read further down the wikipeado entry it's talks about MAP sensors being used in conjunction with EGR valves.... interesting.

So if I understand correctly - it wont matter if you shaft that MAP sensor cause it is probably only controlling your egr valve which has been either bypassed or removed.

MAP

Click to expand...

i understood that to be 'manifold-absolute-pressure' ..
in other words .. a measurement of turbo boost

see page 50 ..
http://www.rover-club.net/graphics/manuals/16/m47r_diesel.pdf
'boost pressure sensor .. front end of intake manifold'
and page 59 .. top bit thereof ..

~~~~~~~~~~~~~~~
not sure if that's the 'mystery' bit yer all on about ..
as have no idea what would .. or would not .. occur if it weren't connected ..
( edit )
oooops .. i take that back .. having just re-read page 59 of said .pdf doc

hd3 said:

i understood that to be 'manifold-absolute-pressure' ..
in other words .. a measurement of turbo boost

see page 50 ..
http://www.rover-club.net/graphics/manuals/16/m47r_diesel.pdf
'boost pressure sensor .. front end of intake manifold'
and page 59 .. top bit thereof ..

~~~~~~~~~~~~~~~
not sure if that's the 'mystery' bit yer all on about ..
as have no idea what would .. or would not .. occur if it weren't connected ..
( edit )
oooops .. i take that back .. having just re-read page 59 of said .pdf doc

Click to expand...

That's the sensor alright...not sure I understand what it does exactly but this bit sounds alarming:

"If the sensor fails, a substitute value of 900millibars is used by the ECM producing a reduction in power due to fuel quantity limiting and EGR shut off"

That manual is a great resource btw. Thanks

not sure I understand what it does exactly ..

Click to expand...

monitors the turbo boost ..
be one calculation used by the ecu to govern fuel injection at any given time ..
and warn of a no-boost or over-boost situation from the turbo ( 'probably' .. without re-reading the td4 files

but this bit sounds alarming:
"If the sensor fails, a substitute value of 900millibars is used by the ECM producing a reduction in power due to fuel quantity limiting and EGR shut off"

Click to expand...

sort of like a fail-safe .. gets you home 'n not totaly stranded ..
( or .. in the case of turbo overboost .. prevents potential engine damage )
i think it's refered to as 'limp mode' ..

That manual is a great resource btw. Thanks

Click to expand...

'thanx' go to 'singvogel' for bringing that pdf to this forum

Thanks hd3 and singvogel.

Interesting to note then that on mine (and suspect most other folks) that sensor had a good amount sludge in the end of it - I cant understand how it could possibly have worked correctly. Can you?

I cant understand how it could possibly have worked correctly. Can you?

Click to expand...

no ..

can only theorise that air pressure pushes on oily gunk ..
which in turn presses on sensor ..
can only 'imagine' how it physicaly works .. not having seen it ..

~~~

i've never had the manifold off ..
deleted the egr at near 38k miles .. and it weren't too dirty ..
still have it stashed 'n yet to bother cleaning out ..
i figure a good bit of right-boot-to-floor once in a while .. will help self-clean the manifold
even if it's totaly clean .. some oil will normaly get in there over time ..
( from the turbo .. via the intercooler hoses ..
( turbo seals primarily keep exhaust gases from entering the oil passages / oil sump
( the fact that they prevent too much oil entering the air intake .. is secondary ..
( http://www.approvedturbo.com/articles/ATC-Oil-Leak-Troubleshooting.pdf
( so .. it's normal for some oil to be found in the post turbo air intake assembly ..