hi everyone im having a few problems with my 99 uk wrx. its only running 230 hp with a k&n panel filter, bailey dump valve and its all standard apart from that. its reading 22 knock sensor and 45 pressure sensor. the boost is fairley hesitant at times when i excellerate who would you reccommend to take it to within the devon area. im aware of ashburton motor wks and alan jeffreys already. any new ideas of possible fault or the best garageto take it to.

 

if you get hold of the diagrams to so where the sensors are you can change out yourself cause your halfway there with knowing the problem

 

Alan jefferys or Rowleys Performance Engineering Ive used both.

 

Alan Jeffery has a really good "Ask the Expert" email facility on his website, Enginetuner.co.uk, which the man himself answers.

I've asked 2 or 3 questions now, and he's responded within 24hrs, sometimes a lot sooner (not sure about Sunday though).

The more detailed your question to him, the more satisfactory his answer/diagnosis will be! Somewhat unsurprisingly, the chap knows his Subarus.

 

i got a k an n filter in mine to mate an since then the light come on to saying it the knock sensor. thinkin of putting standar back in until remap coz heard weak fuelling to air ratio can cause pre det and this is what the car is telling u

 

ye cool i have still got my standard filter so i might pop it bk in. its strange i have been out in it all day and its pulling really well and have had no warning lights or any hesitant boost. i will leave it to see how it is for a few days and if it plays up i will take it to AJs. cheers for your advice everyone.