Hey guys i have a 2.0 tfsi leon sport running a stage 3 bluefin with k04 and hardware to suit auto tech internals and a dw65v in tank pump I'm having an issue where around 5000rpm and above the throttle is cutting on and off (can be seen in logs) like fuel cut! I've tried many remedies even swapping a suspected fuel thrust sensor on the HPFP new 6.4 bar fuel filter and still the problem remains ill attach most recent logs any ideas would be very very grateful!!!! thanks guys! Oliver
Weird high rpm throttle cuts =[ please help
- Thread starter 20vturbocupra
- Start date
Get someone with vagcom monitor misfires in your cylinders on wot you will see a particular cylinder will misfire multiple times if this happens it should be a faulty inj on that cylinder worth a check first, if it is its four hours labour if your changing one or all four.
HI manhota thanks for your reply i have vagcom and show no misfires at these rpms or at all with logs, I've replaced new plugs some ngk 7irex can't fully remember the plug number =[ and R8 coils packs also running the S3 injectors that came with the second hand k04 kit the thing that gets me is the requested boost drops from 2250mbar to 650mbar and back up and down ect at the same revs I'm feeling these cuts but I'm not sure if its this causing the cuts or ecu is telling the boost to shut off because of another fault? should also mention the throttle body is opening closing at the same time as these cuts I'm assuming this is throttle intervention to act as another failsafe
here is my actual vs requested see the dips right down in requested side
Boost Pressure - (specified) Boost Pressure - (actual)
mbar mbar
910 1010
1440 990
1960 1040
2020 1130
2100 1250
2150 1380
2200 1550
2210 1740
2230 2000
2250 2170
2250 2240
2260 2290
2250 2340
2230 2290
2230 2180
2230 2130
2210 2110
1390 2110
1790 1930
2110 1700
2100 1850
1630 2050
2090 1480
2100 1880
2100 1640
2090 1650
1140 2380
2130 1380
380 1940
1940 1350
1750 1740
1220 1440
1790 1550
1700 2100
1630 1200
1410 1300
1160 1570
890 1620
650 1270
470 1270
410 1260
280 1240
280 1160
280 1120
280 1100
290 1090
300 1080
300 1080
290 1080
290 1070
Boost Pressure - (specified) Boost Pressure - (actual)
mbar mbar
910 1010
1440 990
1960 1040
2020 1130
2100 1250
2150 1380
2200 1550
2210 1740
2230 2000
2250 2170
2250 2240
2260 2290
2250 2340
2230 2290
2230 2180
2230 2130
2210 2110
1390 2110
1790 1930
2110 1700
2100 1850
1630 2050
2090 1480
2100 1880
2100 1640
2090 1650
1140 2380
2130 1380
380 1940
1940 1350
1750 1740
1220 1440
1790 1550
1700 2100
1630 1200
1410 1300
1160 1570
890 1620
650 1270
470 1270
410 1260
280 1240
280 1160
280 1120
280 1100
290 1090
300 1080
300 1080
290 1080
290 1070
yes timing chain is fine still in spec and timing belt replaced 5000 miles ago and 0 trouble codes
Brand new injector seals used ?
Maf, Crank shaft and fuel sensor checked
Sorry if you already have I just want to make sure
Maf, Crank shaft and fuel sensor checked
Sorry if you already have I just want to make sure
hey sorry for late reply been having internet issues =[ yep new injector seals used checked mad and mad readings look ok crank sensor? not a clue and i have replaced the thrust sensor for fuel on the side of the high pressure pump also intake pump nope no oil residue this is not a misfire problem its an ecu intervention closing the throttle and reducing boost pressure bit of an update though when i run 50/50 water meth the problem reduces massively! but still noticeable I'm wondering if my eBay S3 intercooler isn't up to the job? i got bluefin to up the duty cycle of the low pressure pump and now it seems instead of it coming in around 5250rpm its coming in closer to 6000 I'm guessing the water meth is decreasing knock and bring timing back down but I'm at wits end haha thanks again!!!!
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