Boost solenoid

[carterjohn]

just a quickie,my rex seems to somtimes have full boost and somtimes it doesnt (on the secondary turbo).could this be the boost solenoid?
if so where is it located?
cheers in advance.  :Thumbs-up

[Jit]

or any number of things under the rats nest....mine turned out to be a split pipe from an actuator...it really could be anything!!

[Fish]

Most likely a collapsing pipe once warm. I found that when I first got my FD, boost on the second was hit and miss, but this was do to a arm going to the flap for the second turbo not being connected.

Fish

[carterjohn]

its fine when its hot,i replaced a load of pipes that looked like they were collapsed or old.still had the problem,researched on here and boost solenoid came up a few times.mmmmmmmmm maybe i should do a checklist or something, any ideas chaps?

[rx7_andy]

i have this now its just started doing it at odd times

[allstaruk]

Me too........

[carterjohn]

we better get this sorted then  :Tongue1
the secondary turbo is deffo not coming in,when it does you know it is cos it boosts lovely,at the moment its hity missy for me sometimes its working sometimes its not.im glad its not just my rex suffering,looks like this could be a common fault.someone one on here must have an answer      :god

[carterjohn]

ok done some searching and came back with this,

http://www.fd3s.net/boost_problems.html

also some advice here,
http://www.newwave.net/~flanham/wlanham/

let me know if it helps anyone out  :Talking1

[Jit]

Like I said previosuly though, it really could be anything.
Has any part of the turbo system been out that maybe you might have done a pipe in when putting back? If not maybe take the IM off and then have a look around the rats nest and see if anything looks amiss there....although some pipes do open to atmosphere iirc so youll need some sort of diagram to help?
Otherwise test the solenoids...i think you can do this by putting 12v across them and listening for clicking.

[carterjohn]

here\'s an update,ive just noticed i can hear a relly loud wooshing sound when the 2nd turbo is supposed to be running.obviously its not,any ideas?

[carterjohn]

update number 2,the rubber pipe on top of the y pipe had a big gash in it,ive replaced it with a silicon hose.i havent took the car out yet as ive had a few beers,but hopefuly this will cure the fault.so everyone with problems check the pipe first

[carterjohn]

i still have this problem and its driving me nuts.  

[nikp]

Ok, try here

This stuff should really be made sticky! The number of times i\'ve posted this link up! It\'s veyr comprehensive as to what things to check and not to check. It\'s very good indeed.