hi, i have a 1995 wrx ra and have a idle problem. when i start it, the revs rise to 2000rpm briefly then drop to under 1000 and will stall. this happens a couple of times before it idles at around 700-1000 but idles rough. it has hks induction kit but run fine before this. i have tried swapping maf sensors, idle solanoids, checked vacum pipes,etc etc. have done ecu resets, no fault codes show up. starting to lose my mind a bit, HELP !!!

 

after much head scratching and component swapping, problem has been identified !! found all the inlet manifold bolts had worked loose resulting in poor inlet to engine seal. quick tighten of the bolts has transformed the car back to normal. got there in the end !!