got abit of an issue with my car reving up when changing gear,put my foot down to anything over 5k revs and when i change gear it revs up, this is also causing my forge bov not to dump the air its staying closed.

the rev issue was doing it before i fitted the bov so its not being caused by that.

any ideas?

 

Your right foot is to heavy

 

haha

 

Throttle cable stiff/ sticky butterfly? Had the hose off between the intercooler and throttle yet? Might be gunked up (not sure if these bug engines suffer breathing issues as older ones do- i hope not as i have the same engine as you!)
Might just be a case of cleaning.

 

how do i check these things...where is the hose youve mentioned

 

The big hose that links the intercooler to the throttle (much bigger than a normal hose) it's the size of a drain pipe if you know what i mean?
Find me a pic and i can point it out to you mate.

 

thats abit of an **** to take off and check isnt it...have to take the intercooler off haha

 

Not too bad mate, if you fitted all of your million backboxes you'll be more than capable. Just pop the 2 12mm bolts off and move it back a touch. (being carefull)

 

is it that easy

wheres the butterfly you mentioned too

 

Hope this works.
You see where it says sti on the intercooler?? Directly below it you'll see a big blue hose, thats the link hose between the throttle body and the intercooler. Once you've got that hose off, look inside the throttle and you should see the butterfly.
Using your left hand- pull the linkage on the throttle to open the butterfly and see if there is any sticky oil residue/carbon build up on the points where the butterfly sits flush with the housing.

 

ahh i see, cheers...looks alot of pipes and stuff connected to the intercooler. might be abit trickier to just move it back abit..ill have to take alook tomoz

 

The pipes you see running in front of the ic are just push on mate, they are for breathing. Trust me it's not hard at all. Just be nice and gentle, you only need to move the ic back like 5mm.

 

providing the intercooler hose palys the game and comes off easily

 

Had mine off three times mate (totally off- so disconnected from the turbo aswell) it will be fine mr worry wart! hehehehe.

 

ill blame you if not lol...cheers mate

 

Hahaha, No pressure then mate.

 

right, intercooler hose is was clean, butterfly was clean and free moving. the throttle cable seems a bit slack where it joins to the throttle body..is that how it should be.

(what a t*at that hose is to get back on, my fingers are in bits

 

Bit of soapy water is a blessing in those cases! The cable should have a slight amount of slackness to it yes. hmm, nothing silly like the pedal is being fouled by something in the cabin perhaps??

 

nothing fouling the peddals mate no, strange one.....if it had just started to happen then ide have blamed it on the forge bov but it did it before i fitted it.

 

Well the valve was spot on when i took it off so i could have said it wasn't that! Hmmm, its a head scratcher.

 

im not saying the valve is faulty mate, let me clear that up!!

as you are aware im sure, some cars dont run well with vta valves thats what i was trying to say. but its not the valve anyway so it dont matter haha....

not sure what else to check, there only seems to be you bothering to help.. cheers

 

No, no, no, wasn't having a dig mate, just tongue in cheek thats all.
The only other things i can think of might be a leaky injector staying open once you lift off, causing car to rev a little.
Or a throttle sensor fault. Needs proper diagnosis me thinks.

 

I think every turbo'd Impreza I've driven has done that..

 

its well annoying...im finding myself driving like an old woman so it doesnt do it, changing gears at 3k revs haha

 

I've found that the best thing to do is let off the throttle completely, the DV obviously goes off, and then change gear.

 

ill give that ago

 

mine is exactly the same doing my head in 53 wrx

cleaned butterfly put standard dump valve back on no differance.

only other thing i can think of is changeng throttle cable.

how easy are these to change?

cheers