All Things Mk5 > Mk5 General Area
disappointing performance continued....UPDATED after a day at MRC Tuning
RunRabbit:
As above, a sensor is more than likely playing up or you have a boost leak. If it's over-fuelling across the rev range then it could well be a MAF or lambda sensor.
duncan:
--- Quote from: stokeballoon on March 31, 2009, 08:57:18 pm ---What did he say about the MAF? May be worth plugging another one in, just to test. I think a sensor is fooling the ECU into thinking it needs to fuel. Is the Air filter ok? Bear in mind where the car was imported from, that sand gets everywhere...........
If i knew which sensor.......................
This bit does seems strange, and does discount the MAF. But I am not convinced.
--- Quote from: duncan on March 31, 2009, 07:22:32 pm ---
firstly he flashed the ECU back to standard which came up at 195bhp slightly under power but pretty close to what stock should be
--- End quote ---
May be worth taking a look at the MAF.
--- End quote ---
when he was data logging the car on the rollers (stock map) he ruled out problems with the MAF, so did Reuben at Tuning werkes, but is still a possibility i guess.
also worth bearing in mind that the engine hasnt thrown up any codes what so ever (none found using VAGCOM)
duncan:
--- Quote from: RunRabbit on March 31, 2009, 09:02:25 pm ---As above, a sensor is more than likely playing up or you have a boost leak. If it's over-fuelling across the rev range then it could well be a MAF or lambda sensor.
--- End quote ---
it is only running super rich past 3500rpm to the limit
autoperfection.com:
Sounds like a nightmare - hope you get it sorted
Jim :happy2:
duncan:
do you think i should run the map if its still only putting out under 220bhp? the car feels fantastic with the map but obviously want it to work at full potential, you really notice the extra torque too!!
would be over the moon if this problem gets solved tomorrow but am not holding my breath....
also only one of the PCV's were changed - could it possibly be a faulty rear PCV as well? is it worth getting that changed as well?
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