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28i - Possible Boost Issue?
- SteveSmith
- Member
- Posts: 760
- Joined: Wed Nov 16, 2016 11:33 am
28i - Possible Boost Issue?
Hi guys,
Driving home tonight with the roof down in sports mode and manual mode and whilst off the throttle I thought I heard a bit of a "dump valve" noise.
When I pressed on it didn't sound the same, you normally hear a bit of spooling etc plus it didn't feel as fast.
I've tried to look for any lose hoses etc but can't see anything.
Then I booted it again and it felt ok, then the next time it felt flat again.
Is there any common faults like this? Could the "dump valve" be sticking?
Driving home tonight with the roof down in sports mode and manual mode and whilst off the throttle I thought I heard a bit of a "dump valve" noise.
When I pressed on it didn't sound the same, you normally hear a bit of spooling etc plus it didn't feel as fast.
I've tried to look for any lose hoses etc but can't see anything.
Then I booted it again and it felt ok, then the next time it felt flat again.
Is there any common faults like this? Could the "dump valve" be sticking?
28i M Sport - Alpine White / Canberra Beige, 19" M359’s, H&R’s / Eibachs, BMS Stage 1 - 271bhp, Front Splitter, CF Rear Lip, Alcantara Steering Wheel and Brembo 4 pots
- SteveSmith
- Member
- Posts: 760
- Joined: Wed Nov 16, 2016 11:33 am
28i - Possible Boost Issue?
Could it be the exhaust valve jammed closed? Or not opening on occasion? It seems fine one minute then it's very muted on downshifts another.
28i M Sport - Alpine White / Canberra Beige, 19" M359’s, H&R’s / Eibachs, BMS Stage 1 - 271bhp, Front Splitter, CF Rear Lip, Alcantara Steering Wheel and Brembo 4 pots
-
- Lifer
- Posts: 11079
- Joined: Tue Feb 10, 2015 10:27 pm
28i - Possible Boost Issue?
My thought went to an intermittent sticking wastgate Steve, if you can get to it spray some releasing fluid on it, it won't hurt, might smell a bit is all. Worth a try before you open your purse..
M roady...OEM CSL’s, strut brace, Remus back boxes, ZHP
MR2 MK 2
E89 35i project car...mapped 365bhp, M4 stoppers & wheels, KWV3’s, H&R front ARB, M3 front arms, strut brace Eisenmann cat back race exhaust, VRSF downpipes inbound
E89 35is
G29
MR2 MK 2
E89 35i project car...mapped 365bhp, M4 stoppers & wheels, KWV3’s, H&R front ARB, M3 front arms, strut brace Eisenmann cat back race exhaust, VRSF downpipes inbound
E89 35is
G29
- SteveSmith
- Member
- Posts: 760
- Joined: Wed Nov 16, 2016 11:33 am
28i - Possible Boost Issue?
That would definitely make sense! Thank you!
Any ideas where the waste gate is!?
28i M Sport - Alpine White / Canberra Beige, 19" M359’s, H&R’s / Eibachs, BMS Stage 1 - 271bhp, Front Splitter, CF Rear Lip, Alcantara Steering Wheel and Brembo 4 pots
- Smartbear
- Lifer
- Posts: 13685
- Joined: Wed Feb 05, 2014 6:54 pm
- Location: a barn in Somerset
28i - Possible Boost Issue?
Hi Steve, your car either has a pneumatic wastegate actuator or a solonoid controlled one depending on date of manufacture-either can go wrong.SteveSmith wrote: ↑Fri Jun 30, 2017 8:47 pm
That would definitely make sense! Thank you!
Any ideas where the waste gate is!?
They are located on the l/h side of the engine as the turbo is part of the exhaust manifold
Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold
- SteveSmith
- Member
- Posts: 760
- Joined: Wed Nov 16, 2016 11:33 am
28i - Possible Boost Issue?
Nice one! I'll have a look in the morning when it's cold!
28i M Sport - Alpine White / Canberra Beige, 19" M359’s, H&R’s / Eibachs, BMS Stage 1 - 271bhp, Front Splitter, CF Rear Lip, Alcantara Steering Wheel and Brembo 4 pots
-
- Lifer
- Posts: 11079
- Joined: Tue Feb 10, 2015 10:27 pm
28i - Possible Boost Issue?
I'm thinking actuator rod linkage as well. look on google where the turbo is and spray fluid in that area, I doubt you'll be able to get your head in there, or use a mirror,. The manifold will smoke afterwards but it'll soon dry off. That's not a long term solution but if it frees up for a day or two you'll know it's that.
M roady...OEM CSL’s, strut brace, Remus back boxes, ZHP
MR2 MK 2
E89 35i project car...mapped 365bhp, M4 stoppers & wheels, KWV3’s, H&R front ARB, M3 front arms, strut brace Eisenmann cat back race exhaust, VRSF downpipes inbound
E89 35is
G29
MR2 MK 2
E89 35i project car...mapped 365bhp, M4 stoppers & wheels, KWV3’s, H&R front ARB, M3 front arms, strut brace Eisenmann cat back race exhaust, VRSF downpipes inbound
E89 35is
G29
- Twin Turbo
- Member
- Posts: 722
- Joined: Sun Apr 20, 2014 10:48 pm
28i - Possible Boost Issue?
I would use and OBC reader - is there an owner near you with a carly?
viewtopic.php?f=2&t=97818&p=1438351&hil ... y#p1438351
Quick 10 minutes - will help to find out what the issue is.
viewtopic.php?f=2&t=97818&p=1438351&hil ... y#p1438351
Quick 10 minutes - will help to find out what the issue is.
- SteveSmith
- Member
- Posts: 760
- Joined: Wed Nov 16, 2016 11:33 am
28i - Possible Boost Issue?
I have no engine management light.
28i M Sport - Alpine White / Canberra Beige, 19" M359’s, H&R’s / Eibachs, BMS Stage 1 - 271bhp, Front Splitter, CF Rear Lip, Alcantara Steering Wheel and Brembo 4 pots
- Smartbear
- Lifer
- Posts: 13685
- Joined: Wed Feb 05, 2014 6:54 pm
- Location: a barn in Somerset
28i - Possible Boost Issue?
Sometimes there can be a stored code despite there being no engine light on the dash
Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold
- SteveSmith
- Member
- Posts: 760
- Joined: Wed Nov 16, 2016 11:33 am
28i - Possible Boost Issue?
Right, definitely the waste gate arm so thank you for that suggestion!
It was "out" when I first went to the car this morning, after about 30 seconds of driving it went back to normal, it's now returning and feels fine.
I'll keep my eye on it!
It was "out" when I first went to the car this morning, after about 30 seconds of driving it went back to normal, it's now returning and feels fine.
I'll keep my eye on it!
28i M Sport - Alpine White / Canberra Beige, 19" M359’s, H&R’s / Eibachs, BMS Stage 1 - 271bhp, Front Splitter, CF Rear Lip, Alcantara Steering Wheel and Brembo 4 pots