All Things Mk5 > Performance Modifications
Bluefin Stage 2 too much boost .. not enough fuel pressure?
Mark_GTIV:
--- Quote from: john_o on May 31, 2009, 08:42:24 pm ---have you have checked that you arent due the Fuel Pressure Sensor recall (not that I think its an issue here)?
reading your comprehensive reply. Im surprised your fuel press actual is ABOVE your requested.
forge shouldnt have an effect under WOT and you are achieving requested boost levels.
I assume you have tried going back to stage 1 (which the bluefin will allow) and the fault doesnt occur ?
FP looks ok in rest of range but have you checked your cam follower?
may also be worth changing your in tank fuel filter too?
the question in my mind would be why SC map is requesting a boost level the car (in good working order) cant achieve :surprised:
either that or dropping the boost is just a band aid to hide an issue you havent found yet...
at the end of the day vrstu's the expert :wink:
(the other contraversial option given the way the bluefin maps are uploaded , in theory you could reflash to stock and get a stage 2 REVO or APR trial and see if it exhibits the same issue))
--- End quote ---
Hi,
Thanks for the reply. Blimey I hope it's not hardware related. 2007 car, 26K Miles perfectly serviced and for two years pretty much only driven by my wife (prolly hardly ever hit 3K RPM) still it is still under warranty.
Actually, my fuel pressure is on or below requested. As to the the point regarding SC and why SC map is requesting a boost level the car (in good working order) cant achieve : if the car only made the level SC requested, it would be fine, but the car is making a little more boost than SC request and thats what is taking it over the edge.
Of course this is all assuming that the mapping SC sent me for stage 2 is the right one.
vRStu:
Boost requested is often higher than actual, especially on REVO'd KO3 cars as they just ask for the maximum.
I don't think it would be advisable to have trial software installed.
The boost levels will go a bit crazy when the fuel cut hits as the engine/ECU will 'pull back' to keep things safe. Sort the fueling out and I think you'll have solved the problem. IMHO you are asking too much of the OEM pump with an agressive map.
Also worth logging the timing to see how much you are pulling.
Mark_GTIV:
--- Quote from: vRStu on May 31, 2009, 10:08:17 pm ---Boost requested is often higher than actual, especially on REVO'd KO3 cars as they just ask for the maximum.
I don't think it would be advisable to have trial software installed.
The boost levels will go a bit crazy when the fuel cut hits as the engine/ECU will 'pull back' to keep things safe. Sort the fueling out and I think you'll have solved the problem. IMHO you are asking too much of the OEM pump with an agressive map.
Also worth logging the timing to see how much you are pulling.
--- End quote ---
In my case actual boost is sometimes more than requested boost. With the milltek TBE and the Carbonio the airflow on my car is better than SC were anticipating with the standard stage 2 map. The car's fuel delivery system simply cant cope with delivering enough fuel for 1.43 BAR of boost through the 2.8K to 4.3K rev range.
They've toned down the mapping and after the 3rd map that they've sent me today - the car has settled down - isn't throwing a DTC code and is able to deliver correct pressure for the amount of boost generated.
Problem is solved and car is now running 1.2 BAR of boost safely. So a big thanks to Superchips for helping to sort this out today.
Mark_GTIV:
Further discussed here : http://www.mk5golfgti.co.uk/forum/index.php?topic=4289.msg83398#msg83398
Solved here : http://www.mk5golfgti.co.uk/forum/index.php?topic=5543.msg85303#msg85303
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