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Discussion Starter #1
Hope that someone can point out the problem(s): I've changed a new recon. turbo to my 2009 Navara and it started as expected but the problem is it can't rev. pass 2.5k. There is no boost although I changed new Mann fuel filter, new boost solenoid. Also there's no fault code except the DPF light is on. I'm at the deep end , please help !!!
 

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Plugged DPF will stop it revving. A quick check is to check the temperature on the inlet and compare it against the outlet. A large difference means it likely has a blockage.
 

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Not revving above 2500 means the engine is in limp mode, it has detected a problem. As above, the DPF fault is probably causing that.

Any particular reason you have changed the turbo? Hopefully it wasn't what loads of people have done, finding some oil in the intake and assuming the turbo seals have gone.
 

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Discussion Starter #4
Not revving above 2500 means the engine is in limp mode, it has detected a problem. As above, the DPF fault is probably causing that.

Any particular reason you have changed the turbo? Hopefully it wasn't what loads of people have done, finding some oil in the intake and assuming the turbo seals have gone.
The turbo was blown on the way home a month ago: dumped clouds of smoke and oil on the road and luckily not damage anything.
Thanks for your advise Landmannn and Garybee, clean DPF is next. Any suggestion ? remove DPF or can be done in situ.
 

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Only guessing, but it is likely that all that oil has gone into the DPF.
I would suggest it needs taking off and cleaning, there are specialists out there, I don't think it would a DIY job.
 

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That's a big clue as well then, it would not have liked having that amount of oil dumped through it.

I think landmannnn and I have slightly different reasoning for suspecting your DPF. Is it a hard cut (as if the ECU reaches that RPM and refuses to allow any more) or is it a vague refusal to rev further? The latter is what I was assuming and would be the case with any big restriction in the exhaust. When cats/DPFs etc get plugged they stop the engine breathing but it will often idle fine. My approach would be different depending on which is the case.

I also suspect that if you have a DPF light on the dash then you must have a fault code. I suspect that your code reader is letting you down here.
 

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Just some rusty bolts to get off. Check around first with garages, apparently DPF cleaning is highly in demand!
I did see some videos of people jet washing them and using degreasers, no idea if that actually works though.
 

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Discussion Starter #9
Called out a mobile DPF cleaning service and they injected some chemical into the DPF then run engine at 2k for 15 min.
Engine is back at full power but exhaust pressure sensor is faulty need to be changed. That's will be done tomorrow.
 
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