Which I assume is the right stuff for the job? I think purity and evaporation rates are the essence of this stuff. Electrical contact cleaner is harsh and WD40 is more a lubricant (although I know it has a thousand and one cleaning applications - just look on YouTube)
I used this to also clean the intake valve butterfly flappy-thingy which was looking rather crusty also
Bought my last lot from Amazon back in Feb 2016 but it is not showing available now
But the above link looks like a valid purchase.Current Ride: D4 XS Commercial Baltic Blue SDV6 fully loaded with heated everything
Track Days: BMW E36 M3 Evolution MY 1996 (3.2 Litre 377 BHP sat in 1,250 Kgs of car, with a pro safety cage and some serious braking power)
4th Dec 2016 5:13 pm
Member Since: 02 Nov 2016
Had a look at mine today and it was pretty sooty. Cleaned with a bit of brake cleaner.
Also discovered how to get the engine cover off! Nice and easy, no tools required, much simpler than the TD5 cover.
I was towing our 1.5 tonne carvan to the Forest of Dean last week, going up a long steep B road out of Monmouth, lifted the throttle on a bend and the disco went into limp mode and displayed the special programs unavailable message, 3 miles at 20 mph, pulled over at the first layby restarted the engine, and all was fine again.
After read the error codes the only significant one was :-
P0234-00 (6 Unknown
After a bit of research i was having visions of changing the turbo in the hope that might fix it, i hate swapping parts to see what happens.
I came across this post, so today i had a quick look at ours. It was completely blocked with oil/crud as was the hole in the manifold. I cleaned it with contact cleaner and cleaned out the hole. I can't believe the difference it has made, our car has always had a noticeable flat spot from moving off, its like a different car now, very responsive, and much quicker, even my wife noticed the difference.
I used my iid tool to monitor the absolute manifold pressure in neutral over 750-3000 rpm before and after cleaning the map sensor, before it ranged from 0.9 to 1.1 bar, after cleaning it was 1-1.3 bar.
The egr valves had been blanked by the previous owner so hopefully it wont get blocked again, but I'll be cleaning from time to time.
Many thanks to all involved in this post, I'll check what effect it has on the limp mode problem and mpg.
12th Apr 2017 5:27 pm
Member Since: 16 Apr 2017
Do the petrol engines have a MAP sensor? I thought all modern engines had them? The only thing i have been able to find so far is that it is a EGR/MAP sensor but havent been able to confirm.
2nd Jun 2017 3:07 am
Member Since: 15 Sep 2016
Thanks for the info! Cleaned mine too, loads of residue on it. Five (5) minutes job.
13th Jul 2017 4:13 pm
Member Since: 14 Jul 2017
2005 2.7 TDV6. 93k and it was stinking.!
15th Jul 2017 11:03 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
When I changed my MAP sensor 80k miles agony EGRs were blanked. The sensor I took out of the D3 when I stripped her was like new. Blanking EGRs deffo eliminates the gunk buildup.
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11 D4 HSE - just Dee, no more Double Disco.
Old Dee 🇬🇧🇫🇷🇹🇳🇪🇸🇦🇩🇧🇪🇳🇱🇱🇺🇩🇪🇮🇹🇩🇰🇸🇪🇳🇴🇫🇮🇵🇱🇸🇰🇨🇿🇱🇹🇱🇻🇧🇼
New Dee 🇬🇧🇫🇷🇧🇪🇳🇱🇩🇪🇩🇰🇸🇪🇮🇸 + 🇵🇱🇫🇮 next
The D3 was a bit sluggish yesterday, see other post, so thought I would clean the MAP sensor today. It was on the list anyway.
Not as gunked up as I had hoped for.
Click image to enlarge
Click image to enlarge
A wipe down and cleaned the hole out. Not expecting it to make much of a difference.
I am wondering if Broadfields cleaned it up when they blanked the EGRs. It has done 123k so I suspect they did.
2006 Disco 3
Gas Gas 300ec
Gas Gas tx249
Pajero 2.8 Lifted and Safari Snorkel
26th Aug 2017 11:43 am
Member Since: 28 May 2014
Do the petrol engines have a MAP sensor? I thought all modern engines had them? The only thing i have been able to find so far is that it is a EGR/MAP sensor but haven't been able to confirm.
The 4.4 V8 petrol engines have a MAP, but the V6s don't seem to. It doesn't appear to get as badly contaminated with crud as the Diesels, but it's location at the rear of the inlet manifold, at the back of the engine, makes it a real B1tch to get at. You can't see it and it's hard to feel for it. In the end I had to use my Borescope both to find it and to help get it out.
When I did manage to get it out I found it was quite clean, but as it was in my hand I gave it a clean with contact cleaner. Putting it back was as hard as removal but manage it in the end.
I would say leave it alone, the petrol engine is cleaner than the diesel and not likely to soot up the MAP.
26th Aug 2017 12:54 pm
Member Since: 20 Nov 2016
Member Since: 10 Apr 2017
Location: Hong kong
Thanks for the great tip. 8 5,000 km
Seen to drive better.
Will try semi-synthetic 2 stroke oil when i find it.
Would someone please tell me how do I know when it's time to replace the egrs?
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