Losing Boost I Think?

**Rob_ioClean** · Saturday 21st October 2006, 10:04

ok if i put my foot down the boost gauge nearly goes half way and then drops back slightly? is this what they are ment to do?

Thanks

**dreadly** · Saturday 21st October 2006, 10:25

Originally Posted by T5-Beast

ok if i put my foot down the boost gauge nearly goes half way and then drops back slightly? is this what they are ment to do?

Thanks

Does it feel like it's down on power and pulling back, could be an air leak, sticking wastegate etc...

**irf** · Saturday 21st October 2006, 11:19

have a look at this , it may help. i need to check this myself but am dreading the heat shield having had a look at it.

**wootty** · Saturday 21st October 2006, 11:23

can you hear any whistling when boosting up.

**thetroublemaker** · Saturday 21st October 2006, 11:52

i can hear hissing (not a whistling more of a sucking noise - but of air flowing) and mine also goes to about 3/4 then drops back to about 1/2 way.

Andrew · Saturday 21st October 2006, 12:17

Easiest thing to do is stick a boost gauge on it and see whats what.

Also adam has a trick of holding the revs at 2k and if it hunts then it's likely got an air leak.

Also where you located might be a local member who can help. Edit your location in your profile.

Ac.

**shaun850** · Saturday 21st October 2006, 12:26

Have a look under the black cover where the vac pipes go to the tree..

my guess is that you have a split pipe there ( mine did )

**craig** · Saturday 21st October 2006, 15:46

check the bottom of the big rubber pipe that joins onto the inlet manifold they blow occasionaly

**thetroublemaker** · Monday 23rd October 2006, 14:24

Edited my profile.

All the vacuum hoses on mine look good around the tree there with the exception of the large one which goes into the ISCV which appears to have leaked oil out over the valve. I will put a new clip on it later.

**Rob_ioClean** · Monday 23rd October 2006, 15:13

Originally Posted by wootty

can you hear any whistling when boosting up.

can kind of, i thought it may be the turbo spooling up, on the vac tree some donut has put screws in the hole to seal them? anyone know if this may were the air is leaking? and how easy to replace?

**thetroublemaker** · Monday 23rd October 2006, 16:00

Originally Posted by T5-Beast

can kind of, i thought it may be the turbo spooling up, on the vac tree some donut has put screws in the hole to seal them? anyone know if this may were the air is leaking? and how easy to replace?

there are caps on mine.

sure ovlov would sell them to you for about £1 a time lol

**Rob_ioClean** · Monday 23rd October 2006, 16:16

well the things the cap go on are missing so they have just pluged the holes with bloody screws! lol

**T5chris** · Monday 23rd October 2006, 16:20

Originally Posted by thetroublemaker

there are caps on mine.

sure ovlov would sell them to you for about £1 a time lol

More like 100 qiud + VAT a time Lol.

**thetroublemaker** · Monday 23rd October 2006, 17:04

Originally Posted by T5-Beast

well the things the cap go on are missing so they have just pluged the holes with bloody screws! lol

that dosent make sense.

the caps fit directly onto the vacuum tree - or at least do on mine

**swordy21** · Monday 23rd October 2006, 17:23

Mine blew a cap off, after I loosened it faffing around working our where best to install my boost gauge hose. I fixed it by looping a piece of 4mm silicon hose between two of the nozzley thingies and securing each end with cable ties. As long as it is a closed system it's fine - not given me any problems in about a year since I did it.