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02 September 2008, 07:21
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Join Date: Jun 2008
Posts: 519
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Loss of boost
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 Was driving back from mcrae gathering on sun and noticed i only had just under a bar of boost. The car normally runs at 1.3 /1.4. Would this indicate a fualty boost solenoid? just replaced all the breather hoses with silicone ones as well. Any advice much appreciated. Thanks in advance
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02 September 2008, 11:24
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Join Date: Feb 2006
Location: Warwickshire, UK
Posts: 1,618
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Have you replaced the 'breather' hoses or "vacuum" hoses with silicon, a common problem is changing the turbo hosing and not re-fitting the restrictor from the stock hosing into the silicon (it goes in the hose from the compressor housing to the first T-piece), result is loss of boost!
Simon
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02 September 2008, 18:53
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Join Date: Apr 2007
Location: Harlow, Essex
Posts: 408
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if you changed the boost hoses for silcone ones were they the same size cos if there were different from original that could be cause of problem
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02 September 2008, 19:15
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yeah they were the same size 3mm and put the restrictor back in but will check that it is in the right place can any put a pic up of where they should be coming off the boost solenoid please
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02 September 2008, 21:46
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Join Date: Apr 2007
Location: Harlow, Essex
Posts: 408
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If you have a 3 port it should be in the bottom pipe mate
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03 September 2008, 06:58
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03 September 2008, 08:36
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Location: Harlow, Essex
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03 September 2008, 13:26
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Join Date: Feb 2006
Location: Warwickshire, UK
Posts: 1,618
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If your on the stock BCS, the restrictor goes in the piece of pipe that goes from the compressor housing oulet to the T-piece. (the other two legs from the T-piece go to the BCS (the leg of the T) and the wastegate actuator('straight on' across the top of the T from the inlet from the compressor)).
Worries me people tinkering with engines who don't know a breather from a vacuum/pressure signal pipe!
Simon
Last edited by The rookie : 03 September 2008 at 13:31.
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03 September 2008, 18:16
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all the pipes were changed 1 at a time as to not confuse them! its just that the boost has dropped to just under a bar so for all i no it could be a problem with my boost gauge not reading correctly but was just asking for some advice
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03 September 2008, 18:33
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Join Date: Apr 2007
Location: cheltenham
Posts: 407
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Quote:
Originally Posted by scoobybrad
If you have a 3 port it should be in the bottom pipe mate
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didn't think you needed restictor pill for 3 port boost solinoid 
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03 September 2008, 19:21
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Join Date: Apr 2007
Location: Harlow, Essex
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neither did i but then i got told i did, there should be a pic somewhere, i'll see if i can find it
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03 September 2008, 19:22
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Location: Harlow, Essex
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03 September 2008, 20:10
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Location: cheltenham
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when i had my car mapped by jgm it had original 2port on,the pipes had been replaced by previous owner which they did not put restrictor back in which caused problems mapping the car,so jgm then fitted 3 port mapped car no problems,i think restrictor is built in on a 3 port if i'm wrong someone will put me right 
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03 September 2008, 20:11
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mine is different to that
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04 September 2008, 23:41
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Join Date: Mar 2002
Location: Spec C - 12.5 @ 110
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If your car is mapped on a 3 PBS, then you don't need the restrictor.
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05 September 2008, 07:10
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Join Date: Jun 2008
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Anyone have a pic of different boost solenoids and piping diagrams like brad has as this would be gret for the forum as its a common question by the look of it
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05 September 2008, 20:18
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Location: Harlow, Essex
Posts: 408
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You got a different boost controller to the pic i put up?
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05 September 2008, 20:20
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Location: Harlow, Essex
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