As the title says, whilst changing the alternator (what a faff on, don't get me started) came across this weird plastic ball that appears to be a vacuum/pressure collector/regulator perhaps? Anyway the 2 red silicone hoses that should be attached to it weren't. So I attached them. All was fine until I finished the alternator replacement (I said don't get me started ) and although the car would start and run, after she was warmed up and I ran her down the road a couple of miles, she kept cutting put on idle. Popped the lid, took the 2 hoses off with a "psshhhtt" like vacuum releasing, and hey presto tickover resumed quite happily.
Should I be bothered/concerned or just leave the pipes disconnected and out of the way. Is this ball emissions related?
Thanks for any help
Weird vacuum/pressure ball in o/s wheel arch - S2 K series
- alicrozier
- Posts: 4368
- Joined: Thu Sep 01, 2005 12:58 pm
- Location: Aberdeen
Re: Weird vacuum/pressure ball in o/s wheel arch - S2 K seri
https://www.deroure.com/diagrams.asp?TB ... 0&ST=&SC=0
For flapping your exhaust...
Not sure why it would cause stalling if properly connected, IACV issues too?
For flapping your exhaust...
Not sure why it would cause stalling if properly connected, IACV issues too?
All characters appearing in this post are fictitious. Any resemblance to real persons, living or dead, is purely coincidental.
Any references to laptimes, speed or driving on the public highway are purely for dramatic effect.
Any references to laptimes, speed or driving on the public highway are purely for dramatic effect.
Re: Weird vacuum/pressure ball in o/s wheel arch - S2 K seri
Yes, it's for the flap for the 2nd exhaust pipe on the standard lotus exhaust. Not needed if you have an aftermarket exhaust.
'03 Elise 111S - Sold
'55 Boxster S - Sold
'08 Exige S 240PP - Sold
'10 Evora NA - Sold
'12 Cayman R
'55 Boxster S - Sold
'08 Exige S 240PP - Sold
'10 Evora NA - Sold
'12 Cayman R
Re: Weird vacuum/pressure ball in o/s wheel arch - S2 K seri
Its a vacuum reserviour. It's likely to be connected to your inlet manifold so the pipes should not just be left loose they should be blocked or you'll be bleeding air into the inlet which will affect the idle. If it does cut out when they are blocked then perhaps the car has been setup to idle with this air included in the equation?
- mwmackenzie
- Posts: 4308
- Joined: Thu Feb 22, 2007 10:22 pm
- Location: Edinburgh
Re: Weird vacuum/pressure ball in o/s wheel arch - S2 K seri
I trust your car is a 111s VVC, if so it's as stated above, opens the valve on the drivers side exhaust tail pipe
Mark MacKenzie
BMW Z4 3.0si, [R14 MMK] To be Ring ready soon
Fancy Ass Merc thingy S [R4 MMK] 85% MacKenzie'd Family Spec
BMW Z4 3.0si, [R14 MMK] To be Ring ready soon
Fancy Ass Merc thingy S [R4 MMK] 85% MacKenzie'd Family Spec