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Author Topic: high oil usage, any ideas?  (Read 31228 times)

Offline heavyd

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Re: high oil usage, any ideas?
« Reply #105 on: August 27, 2011, 11:09:12 pm »
ok then. Basically, logging the same block in vagcom with the shark map on(block 3) shows ATDC, logging block 3 when I had the bluefin on the car, gives BTDC as shown below. I'll run the PDT map tomorrow and see what shows :party:

Offline heavyd

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Re: high oil usage, any ideas?
« Reply #106 on: August 28, 2011, 04:16:55 pm »
Well, I swapped to the PDT map, and did some logging.
I did 2 runs in this block, as theres the boost spike that I was getting on the shark map aswell. Also, the runs had to be done in 3rd gear as the private road was unavailable :driver:


« Last Edit: August 28, 2011, 04:38:47 pm by heavyd »

Offline Janner_Sy

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Re: high oil usage, any ideas?
« Reply #107 on: August 28, 2011, 04:33:10 pm »
This is the good thing about logging cars, because you have previous logs when all was well it goes to show theres an underlying issue somewhere.


Offline heavyd

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Re: high oil usage, any ideas?
« Reply #108 on: August 28, 2011, 05:00:57 pm »
Had another look, and it overboosted in february aswell, damn thought I was onto something there aswell :fighting:


Offline vRSAlex

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Re: high oil usage, any ideas?
« Reply #109 on: August 28, 2011, 06:05:10 pm »
You got an uprated hpfp?  The boost control doesn't seem that great if you are getting such a high spike with such a fast drop off and lack of hold at the top.
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Offline heavyd

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Re: high oil usage, any ideas?
« Reply #110 on: August 28, 2011, 06:38:28 pm »
Yep, running an APR fuel pump. I just put a new OEM pump in this afternoon with a new thrust sensor to see if it makes any difference,  
Timing pull looks good on the second run when the engine has been warmed up :surprised:


« Last Edit: August 28, 2011, 07:14:04 pm by heavyd »

Offline vRSAlex

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Re: high oil usage, any ideas?
« Reply #111 on: August 28, 2011, 08:23:46 pm »
Map doesn't ask for much fuel pressure.  Is that pdt's style of mapping?  Do you have an rs4 fuel pressure relief valve?

I wouldn't want to run 1.9 bar of peak boost.  Turbo won't be your friend for long.  Have you done a log of the maf?
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Offline Tfsi_Mike

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Re: high oil usage, any ideas?
« Reply #112 on: August 28, 2011, 08:28:55 pm »

Are the MAFs in these as good as the coilpacks? lol

Offline heavyd

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Re: high oil usage, any ideas?
« Reply #113 on: August 28, 2011, 08:38:43 pm »
Map doesn't ask for much fuel pressure.  Is that pdt's style of mapping?  Do you have an rs4 fuel pressure relief valve?

I wouldn't want to run 1.9 bar of peak boost.  Turbo won't be your friend for long.  Have you done a log of the maf?
I havent got an rs4 valve, there's log I did this morning with the maf readings a couple of posts up. I know the boost is high, it's been spiking for a few months now, no idea why :stupid:

Offline vRSAlex

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Re: high oil usage, any ideas?
« Reply #114 on: August 28, 2011, 08:39:44 pm »
They are 100% better than the Bosch mafs of old.  So 1000% better than our sh*te coil packs.
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Offline vRSAlex

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Re: high oil usage, any ideas?
« Reply #115 on: August 28, 2011, 08:47:15 pm »
Maf figures are fairly low.  You don't hold much boost at the top end so that won't help.  If you had less spike it would tend to hold more at the top.  Do you have any logs when it was running Revo 2+.

You should really see 270 gs or higher.  On comparison, a xbow I did with a 3076 was seeing 380gs! 
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Re: high oil usage, any ideas?
« Reply #116 on: August 28, 2011, 08:53:44 pm »

I was only getting 247g/s max at about 6480rpm on the ITG last time I logged

Offline Janner_Sy

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Re: high oil usage, any ideas?
« Reply #117 on: August 28, 2011, 09:09:51 pm »
247g/s would equate to 305hp.  But that doesnt take into account any extra power from the timing advance, where one of the main issue seems to be, so with the timing retarded as much as you say, it would explain the low power.

Originally your DSG was limiting all timing advance so that no matter what timing the car was asked to advance, it was always limited, hence no timing pull.  They got around that somehow, car running well.  Then the DSG remap, and all of a sudden the car starts to retard timing back in an extreme way, resulting in the new maps with much reduced timing.

We've seen in the logs you have a boost spike, and your previous logs show some high timing pull on what was previously a map without timing pull.  Its also evident the ECU is closing the throttle a little when on full throttle at high RPM and full load.  Your also throwing out black smoke, so something has to be amiss.

Does VCDS allow you to monitor knock protection or even better previous knock protction.  Also Misfire counts etc. 

@ Alex  what sort of issues would normally cause the car to retard timing, apart from high IATs.  Black smoke is normally unburnt fuel, so related maybe?  When a car retards timing, does it do that by closing the throttle body a little or is that something else causing that etc.

Dom are you at the open day tomorrow?

Offline heavyd

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Re: high oil usage, any ideas?
« Reply #118 on: August 28, 2011, 09:24:28 pm »
Well old maf logs show bluefin stage 3= 225g/s, revo stage 2+ 247gs shark stage 3 247g/s
The maf is only a few months old, as I've already queried it.
I cant make it tomorrow sy, Work decided to give us all a day off in april as our bank holiday, so I've got to work tomorrow as a normal working day :fighting:
I still have a gut feeling the turbo is dying :confused:

Offline Janner_Sy

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Re: high oil usage, any ideas?
« Reply #119 on: August 28, 2011, 09:33:38 pm »
dead turbo = reason to go hybrid......