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3.2 auto did 07 p0299 turbo underboost woes...

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nat
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PostPosted: Thu Aug 30, 2018 15:08    Post subject: 3.2 auto did 07 p0299 turbo underboost woes... Reply with quote

Hi all great forum ..

Bought our shogun in Jan this year and ran sweet, towing a horse trailer, until 6 weeks ago. During the hot weather it dropped power (not towing) and eml came on, limp mode was about 5mph. Recovery diagnostics showed p0299 turbo underboost , the turbo was pressuring the pipes at 3000rpm so he wiped error code and I drove car home, fine. A few days later it lost power again pulling the horses but limp mode was about 20mph and eml on. Recovery took it to diesel specialist who diagnosed and' fixed' Blocked map sensor pipe, car ran ok for a couple of weeks . Lost power again pulling out of a junction but power returned after a few minutes with no eml. as my wife was due to tow horses  to the east coast the following week took car to another diesel specialist who couldn't  find a fault but recommended a turbo cleaner , ran one through and it was fine until sunday when it dropped into 5mph limp and recovery diagnosed p0299 turbo under boost again, cleared it and drove it home but dropped into limp mode again this morning but wife managed to get home driving about 20mph.

Does the varying limp mode speeds have a bearing on he fault? the first recovery driver said it sounds like a dodgy boost sensor but reading the tthreads on here it could be a multitude of culprits ...not sure who to throw money at now lol...

Thanks for reading and any advice greatly appreiated

nat Very Happy
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Simonfathead
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PostPosted: Thu Aug 30, 2018 16:51    Post subject: Reply with quote

Hi im not sure what the code p0299 is my car is a 53 plate where only a MUT3 tester works for it as its not OBD2 compatible. Where yours is a later model so it may work on  obd2 not sure. The codes that normally come up are of the 2 digit kind (15 etc). Sorry i cant be much help as im new to the mk3's only had mine a couple of months now, so still learning. Im sure someone will be along who knows more about the problem. There are people on here who are great with these cars hopefully they can help.
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NJV6
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PostPosted: Thu Aug 30, 2018 20:09    Post subject: Reply with quote

Have you had you inlet manifold cleaned out? Have a google search on Pajero inlet manifold and you’ll see a minefield of info. Cleaning the map sensor pipe is a stopgap only and the position of it was revised on later models so it didn’t gunk up as quickly.
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PostPosted: Fri Aug 31, 2018 7:12    Post subject: Reply with quote

My 2005 did something very similar . Limp mode, no power and black smoke when I put my foot down.  Had the turbo rebuilt because it was showing signs of wear in the shaft. Run the car again and the diagnostics came back with egr . A new egr cured it. Not saying that’s what you have but maybe worth a check.
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PostPosted: Fri Aug 31, 2018 8:05    Post subject: Reply with quote

This:
NJV6 wrote:
Have you had you inlet manifold cleaned out? Have a google search on Pajero inlet manifold and you’ll see a minefield of info. Cleaning the map sensor pipe is a stopgap only and the position of it was revised on later models so it didn’t gunk up as quickly.


See here for more details: https://www.mitsiland.co.uk/p0299-p01299-mitsubishi-shogun-montero-pajero-carbon-problem/
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nat
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PostPosted: Fri Aug 31, 2018 20:32    Post subject: Reply with quote

Thanks for the replies ..Im thinking that the p0299 error code covers a variety of culprits..

cheers nat Very Happy
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nat
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PostPosted: Sat Sep 15, 2018 17:00    Post subject: still happening... Reply with quote

Hi all
Still having this issue, today it had some Forte Diesel intake cleaner and some Forte turbo cleaner and dropped into limp mode after 5 miles. Cleared the po299 code twice with obd scanner but engine wouldn't rev past 2k and then eml back on after a few seconds. Rang recovery , whilst waiting for them tried to clear the po299 for a 3rd time, same again, eml off but wont rev past 2k. Recovery arrived , put his scanner on , no code , starts car and revs up normal after an initial splutter.
He checked the connections around the map sensor and they seemed fine.

Any clues anyone?

I have bought a map sensor off fleabay but although they showed a genuine denso model photo in the listing its not a denso that arrived, got quoted £228 for one from dealership so do you recommend fitting the cheapy one or are they poo?

cheers nathan
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nat
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PostPosted: Sun Sep 16, 2018 14:16    Post subject: Reply with quote

*Update*
The new map sensor from Fleabay does say denso on it but very faint printing so dunno if its a genuine or fakey, I fitted it anyway. The car drove fine until this morning after 5 miles it dropped into limp mode again, not going over 1k revs.
Cleared the error code multiple times but it keeps coming back on after a few seconds so got recovery home. Recovery guy thinks it could be turbo sticking , it has had 2 bottles of Forte turbo cleaner through over the last week so really not sure what to think anymore Crying or Very sad  Crying or Very sad

Any clues anyone??

cheers nathan
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Simonfathead
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PostPosted: Sun Sep 16, 2018 14:33    Post subject: Reply with quote

There is a couple of things you could try yourself which i have found on here.

Have you removed and cleaned the EGR valve, could be sticking and whilst the valve is off you could check the inlet manifold as suggested by NJV6, where the valve comes off you can sort of see if the inlet manifold is covered in soot and caked up without actually removed the manifold.

The second is to remove the turbo inlet pipe and (apprently) you can feel if the turbo is free to move and centrally spinning (not flapping around) and whislt your there check the wastegate to see if its free and not stuck, using molegrips you should be able to move the wastegate up and down a small amount, if it doesnt move it could be seized. I have never done this it was something i read on here but might be useful.

Hope some of that is helpful to you
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nat
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PostPosted: Sun Sep 16, 2018 14:41    Post subject: Reply with quote

Thanks Simonfathead Im told these are variable geometry turbos so dont have a waste gate. Not had chance to physically remove and clean the egr but it has had a tin of wynns egr cleaner and a tin of Forte intake cleaner sprayed into it..
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PostPosted: Sun Sep 16, 2018 14:48    Post subject: Reply with quote

To be honest i havent looked to see if mine has a wastegate either keep meaning to!
If your inlet manifold is blocked with soot and stuff the cleaner might not be able to cut through it all.
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PostPosted: Sun Sep 16, 2018 14:56    Post subject: Reply with quote

Dont know if yours looks like this, hopefully not!!

https://www.mitsiland.co.uk/p0299-p01299-mitsubishi-shogun-montero-pajero-carbon-problem/
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nat
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PostPosted: Sun Sep 16, 2018 17:27    Post subject: Reply with quote

Simonfathead wrote:
Dont know if yours looks like this, hopefully not!!

https://www.mitsiland.co.uk/p0299-p01299-mitsubishi-shogun-montero-pajero-carbon-problem/


hope not lol Laughing  Laughing
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PostPosted: Wed Sep 19, 2018 3:05    Post subject: Reply with quote

It will! They all do.

You need to clean the manifold manually, I dred the thought of putting that carbon buildup through the engine which a carbon cleaner does. It’s snake oil, does not work for these manifolds.

When you put the new map sensor on did you clear the rubber hose of gunk?
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nat
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PostPosted: Wed Sep 19, 2018 12:17    Post subject: Reply with quote

NJV6 wrote:
It will! They all do.

You need to clean the manifold manually, I dred the thought of putting that carbon buildup through the engine which a carbon cleaner does. It’s snake oil, does not work for these manifolds.

When you put the new map sensor on did you clear the rubber hose of gunk?


Thanks NJV6 Im sure it probably does but what puzzles me and the folks Ive talked to is why is it intermittent, why will it not rev past 15-2k in limp mode when the engine is warm but will rev fine even with the eml on when the engine has cooled, dunno

cheers nat
ps have cleaned gunk from map sensor pipe twice over the past few weeks
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