Help

[wrxcook]

Help folks ive not been on here for a while as the wife is the main driver of the subaru now, I jumped in tonight and anitialy noticed that it wasn't idling properly as the revs were dropping down to about 400rpm then rising to around 1100rpm, also when driving it sounds like the dump valve is hissing when I lift of even at about 1500rpm this never happened before, all ideas welcome on fixing this, I work away from home and im leaving tomorrow night so time is short to fix this, my un educated thought is the dump valve piston has stuck but would this cause the idling problem it an 03 wrx

[scoobywho]

Yeah can do spray some carb cleaner on it and give it a rev, sometimes they need a drop of oil if its a baileys to stop it sticking

[wrxcook]

So the dump valve could be causing the idling issues? Its a forge dump valve, ill go to halfords tomorrow if I cant get carb cleaner is there anything else I can use

[scoobywho]

Try a small amount of wd40 to clean it a bit

[wrxcook]

It was the idle spring in the forge dump valve that had snapped, this is the smaller of the 2 springs and is a cheap fix thanks for the help

[johnmacdonald]

It was the idle spring in the forge dump valve that had snapped, this is the smaller of the 2 springs and is a cheap fix thanks for the help

Yep, had exactly the same problem. Forge replaced the spring FOC.