was driving to work yesterday 70mph motorway car going ok apart from the low boost . came off at my junction up the hill down into 3rd and foot off the gas.. car is like it is still driving holding revs on driving up the hill ... pulled up to the light and stoped revs shot up to 3k and started going up and down old ladie was looking at me thingking what the hell anyway after it happen at other 2 sets off light i got to my work pulled up and car start sounding lumpy..turnd it of then turnd it back on and all looked and sounded ok drove home last night gave her some boost and all was ok

could this be my throtle cable sticking no check engine light coming on?

oh 92 wrx RA back box and panel filter. any pointers would be great and anything on my low boost to. bosting to 0.4bar but it is going ok

 

Check all hoses, may be a vacuum / boost hose leak ?

Dave

 

ive had a wee look at the boost hoses can see anything wrong . could it be the bov? im puting a std one back on at the weekend

 

could be maf going

 

sry forgot to say just done

 

could be the idle control valve they are a common fault??

 

where abouts is this bud how can i find out for sure and can it be cleand or is it more money for a new 1

 

it is on the intake if you are stood in front of the car it is to the right of the throttle body has a plug that goes in the top of it do you know how to read the fault codes of of it???

 

yeh with the wee black pluggs under the dash . my WW2 morce code is not upto scratch

 

if you do it the long flashes are in 10ns the short in 1ns let me know what it comes up with and I will tell you the result..you can take it off and clean it when you do there is a diaphram inside clean it and a big rubber washer clean it all with brake cleaner do it when it is cold as there are coolant lines that go through it just clamp off the lines before cheers

 

cheers bud i will give that a shot and let ya know im stating work so will go for a wee drive and see whats up i will let ya know how i get on

 

The reason i said about a boost leak is that the std actuator i think is preloaded to 0.7bar i think, and if you are getting lower than this, i.e 0.4bar this would only be poss if there was either a boost leak or actuator not working properly ?

Dave

 

how do i find out for sure mate how much is a new where can i get it

working back shift and have the kid ( holiday) mean i cant get down the car untill the girfriend come in then i have to go to work.......i will have a look at everthing cheers guys

 

Have a good look around your hoses, make sure none are cracked or weathered, have a listen for any hissing noises for leaking pipes, if you have an after market DV try the standard one ?

Dave

 

waiting on std 1 coming will be on at the weekend

 

What vacuum are you reading at lidle, a lower (nearer zero) reading than normal would also indicate a leak ?

Dave

 

i will let ya know mate have to run to work i will post 2night

 

std is 0.8

 

I was talking about actuator preload, not what the ecu runs

Dave

 

ok mate sorry

 

 

right hear goes again lol key in not started read -0.7 at idle - 0.9

driveing along floor it in 3rd boost comes in take her to 6k boost does not reach any more than .4 bar then take my foot off the go faster pedle and my boost gauge goes right down to -1.0like its broke could this be the gauge its self

i will try to get down in the morning to check ecu for faults

 

The -0.7 before the car is started would indicate a problem with the guage!!

It should be reading 0 as in neither negative or positive pressure!

does the car feel slow?

Dave.

 

its like the boost isint coming in hard anuff it used to brake ya neck ......could it be running in limp mode

check my ecu for faults 2day and got 2 long and 4 short flashes = idle air control solenoid yeh.. could the fault of cam up and put the car into limp mode and thats why its not boosting wight

 

Well its worth changing to see if it makes a difference, it may well be this, but i dont understand how it can boost so low? but i am still learning about Imprezas so lets see what happens!

Dave

 

right im going to clean my idle control solenoid( iff i can find the thing ) and reset my ecu

could the leak be coming from the BOV? it dont seem as loude as it was...hopeing to put std 1 back on at the weekend

 

May be leaking, again worth testing, it may not be as loud as usual becuase of the lower boost, it may be working fine.

Dave

 

watch this space
cheers mate