Cookiemonster
Well-Known Member
- Joined
- Dec 18, 2019
- Threads
- 15
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- Location
- South of You
- Vehicle(s)
- 2019 M6 GT
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- #1
UPDATED w/ VIDEOS ON 2nd POST
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I have a top-mounted Hellion TT Kit on my 2019 GT that had something happen when I was doing a highway pull recently. I was building boost quickly and then all of a sudden it was as if boost just 'let go' - the engine didn't sputter or loud bangs or anything.
I noticed that the Eboost2 I've been using was flashing "2ER" but I searched and could not find anything related to this code flashing. It eventually went away and I decided to be safe I'd reset the eboost. I did that and noticed that after shutting the car down and firing it back up to idle that vacuum was reading -8 to -9 instead of the usualy -15 to -20 it had before.
At this point I thought, ok a vacuum line popped off at some point, so I traced all the lines, everything seems to be attached, can't find any loose lines at all - checked the wastegates and bovs, no loose lines there either.
I start the car up again the next morning and same thing with reading less vacuum than normal...I rev the car after it is warm and notice the eboost is reading boost while revving where it never did before, recording peaks of 5-6psi just from hard revving.
I decided to do a light pull and see what the eboost showed - I normally run ~12-13psi at peak (E85) and upon about 75% throttle rocketed up to 14psi...but the car didn't seem to propel itself forward under boost like it does normally when it is running 2psi less - it felt sluggish.
BOV is open under idle, and I keep reading conflicting information stating that at idle it should be open because vacuum holds it open and boost forces it closed, and then the other side that says it should be closed at idle so as to be able to build boost quickly, then opening only to relieve boost. If the BOV is supposed to be closed, I think one of the bovs or both's spring has broken, giving no resistance for it to open against - but this doesn't explain my change in vacuum/boost numbers, does it?
Really looking for help here as nothing in my previous XP with turbochargers adds up to the variables I have come across. Was really hoping it was as simple as a vacuum connection that popped off but seems to not be the case...
__________________________________________________________________
I have a top-mounted Hellion TT Kit on my 2019 GT that had something happen when I was doing a highway pull recently. I was building boost quickly and then all of a sudden it was as if boost just 'let go' - the engine didn't sputter or loud bangs or anything.
I noticed that the Eboost2 I've been using was flashing "2ER" but I searched and could not find anything related to this code flashing. It eventually went away and I decided to be safe I'd reset the eboost. I did that and noticed that after shutting the car down and firing it back up to idle that vacuum was reading -8 to -9 instead of the usualy -15 to -20 it had before.
At this point I thought, ok a vacuum line popped off at some point, so I traced all the lines, everything seems to be attached, can't find any loose lines at all - checked the wastegates and bovs, no loose lines there either.
I start the car up again the next morning and same thing with reading less vacuum than normal...I rev the car after it is warm and notice the eboost is reading boost while revving where it never did before, recording peaks of 5-6psi just from hard revving.
I decided to do a light pull and see what the eboost showed - I normally run ~12-13psi at peak (E85) and upon about 75% throttle rocketed up to 14psi...but the car didn't seem to propel itself forward under boost like it does normally when it is running 2psi less - it felt sluggish.
BOV is open under idle, and I keep reading conflicting information stating that at idle it should be open because vacuum holds it open and boost forces it closed, and then the other side that says it should be closed at idle so as to be able to build boost quickly, then opening only to relieve boost. If the BOV is supposed to be closed, I think one of the bovs or both's spring has broken, giving no resistance for it to open against - but this doesn't explain my change in vacuum/boost numbers, does it?
Really looking for help here as nothing in my previous XP with turbochargers adds up to the variables I have come across. Was really hoping it was as simple as a vacuum connection that popped off but seems to not be the case...
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