04 Defender - Few Fault Codes After Map

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Similar issues on my heavily tuned td5, I had to fit a maf control box to the sensor as the ecu was seeing the maf go above set levels and through up fault code and cut fuelling, it happened around 3000rpm when booting it, the maf box was from bell auto's and sorted the issue.
 
johnlad said:
Similar issues on my heavily tuned td5, I had to fit a maf control box to the sensor as the ecu was seeing the maf go above set levels and through up fault code and cut fuelling, it happened around 3000rpm when booting it, the maf box was from bell auto's and sorted the issue.
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which means your turbo is overspeeding quite a lot so if it's not some stronger VGT/VNT one IMO it will not last too long ... i presume that you are aware that all the management is mixed up this way so better fit an EGT gauge if you dont have one just to be on the safe side... provided you care about the engine
 
sierrafery said:
which means your turbo is overspeeding quite a lot so if it's not some stronger VGT/VNT one IMO it will not last too long ... i presume that you are aware that all the management is mixed up this way so better fit an EGT gauge if you dont have one just to be on the safe side... provided you care about the engine
Click to expand...
Engine has done 28,000 miles like this, it has EGT gauge fitted, drives fantastic and extremily quick, but I swapped for a D3 last month so no longer my concern
 
bankz5152 said:
Ok I see what youre saying! I have got a boost gauge fitted, reads 22psi at full boost, tapped in before the inlet manifold.
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I would try another boost gauge for accuracy you could be a couple of psi over the top or on the border line of over boost and as the turbo warms up the turbo is becoming more efficient
if not try winding the boost down as little as 1psi
if its a maf sensor issue unlug it and test drive ...the ecu will go into a default mode... but if your still surging means your still to high on boost
 
Nanocom is not playing ball and refuses to save live data! Keeps saying 'cannot open file' then 'input recording active' Each time I try it saves **** all. :mad::mad::mad:

So I took pics of the high values.

Air Flow logged high - fault code cropped up twice, and cleared. - Not tried running it without the MAF plugged in yet.

*Update - Runs better without the MAF plugged in, kangerooing is gone.

Ambient Pressure sits around 102.23kpa
Manifold Turbo Pressure 181.88kpa
Air Flow (gr/hr) 639.4 - When in 'Inputs Fueling' - Highest Value
Air Flow 673.2 - When in 'TD5 Instruments' - Highest Value
 
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That MAF reading is good for full load but due to the boost box the MAP reading is low and at that suction the ECU expects greater MAP around 220, IMO that ''conflict'' is the issue, disconnecting the MAF the ECU is on fix default and that's why the kangarooing is gone... that' it...the whole management is mixed up by that bboost box as expected.
 
The uprated sensor needs a remap for it's specific curve otherwise the conflict between it and the MAF will still be there and being a '04 eu3 map the MAF reading is important for fuelling calculations and needs adjustment too in the map
 
True, though the boost box came free with the turbo/map! MAP is extra but £60 can't complain.

So now thats -

New MAF
New Uprated MAP + Calibration
New Injector Harness

None of the other fault codes have shown up since bar 'Airflow logged high' so thats a plus. Reckon fitting the Forge Motorsport actuator would be worth while?
 
Spoke with BBS about my Nanocom generally being a d!ck and it looks like I need to update it to the latest firmware. Shall do this when I get home and see if I can get some live data then report back, see if anything else is a miss.
 
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