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bodstruck

Member Since: 09 May 2020
Location: Wiltshire
Posts: 909

Mucky MAP and other Puma Niggles

Hi All. First Puma and getting to grips with some of the foibles. The 200tdi is super simple compared to this

Overall it drives well and has good power and speed at higher revs. In the last day or so I have noticed that it smokes like heck at lower revs when yow put your foot down - black unburnt diesel type smoke. It is also a little uneven when cruising with little or no load on the engine, just something not quite as smooth as I would expect it to be.

Final issue and only experienced it once was a loss of power when going up a slight hill. It has been running reasonably well up that point but when you put your foot down nothing really happened, I had to change down a gear. Pulled over, turned off left it for a bit, started again and then all was fine.

Research on here suggests the VCV may be the culprit along with a dirty MAP or MAF. The MAF was clean. The MAP was not:

Click image to enlarge

Click image to enlarge

Gave it a glean with carb cleaner and popped it back in. Lord knows what the inlet manifold is like if the sensor was that mucky.

Not tackled the VCV yet as I don't have any diagnostic tool to the the pump re-learn. I can either pop it into the garage and get them to do it (hate doing that) or buy an IID tool and do the job myself. I am assuming the IID can do the necessaries. And they always hold their money so if I do move the Puma on and stick with the TDis then I have not lost much.

Am I on the right track? Any other suggestions while I am at it?

Final thing, the area around the vacuum pump seems filthy, does this indicate it is on the way out?

Click image to enlarge

Click image to enlarge

Cheers.

25th Jul 2022 2:34pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20339

The VCV you can change without diagnostics.
I did and many others, zero problems at all, it will relearn after time anyway.

Regards the brake vac pump, I would carefully clean the mating surfaces (carefully don’t scratch surface) and fit a new gaskets.
Torque settings are in the WSM you can find online.
When I had to change mine due to waterpump failure I replaced the fixings just because I could along with the gasket though not vital.

Don’t remove the nut on the pipe of the brake vac pump, just the fixings affixing it to the waterpump to free it.

See if that helps, give it all a clean with brake cleaner first externally as well and see how it goes.

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25th Jul 2022 5:53pm

bodstruck

Member Since: 09 May 2020
Location: Wiltshire
Posts: 909

I have changed the VCV and the vac pump and given it a good clean.

600 mile round trip to Wales this weekend and ahead of doing EGR blank and other gubbins I would check and clean the inlet manifold again.

This seems a little worse than before

Click image to enlarge

Carbon build up and oil. I have not checked the turbo side of the intercooler yet but I am wondering if I have a turbo issue or excessive oil coming from the engine breather. Stuck my finger up the MAP sensor housing and it was quite wet

Click image to enlarge

Is this likely to be breather pipe oil or indicative of something more serious, perhaps with the turbo?

7th Oct 2022 12:48pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17367

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Either it is yuk coming from the breather, or it could be oil leaking from the turbo. It is not easy to tell which.

This is the reason that many of us fit Provent or other catch-cans on the breather system, to prevent nasty gunk like that getting back into the inlet. This is what came out of my Provent the first time I drained it:

Click image to enlarge

Without the Provent that water and oil soup would have transited the turbo, intercooler, and re-entered the engine! Not a nice thought.

7th Oct 2022 2:06pm

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