very high idle
 

ok so ever since i did the 5 speed swap my car likes to idle at 2k. Every third time or so i drive it it will idle normal. if i shut it off and restart it right away the idle stays high. any one else had this problem any ideas? where to start, other abnormal problems etc.

I have spent half my life with high idle but seem to be ontop of it pretty well now. In my case it was a number of problems over time not just one. Since your problem started after the gearbox change check the following.
Use a mirror and check under the snorkel to see if the rubber is folded back and leting air in. This is the first place to look.
Check that all the hoses underneath are pluged in and none of the smaller ones like vacum got left off.

See how that goes first.
Tony

ok so no vaccume leaks. I noticed today that if i drive it till it warms up park it for 5 minutes then get back in and drive it it idles normally around 800-1k. could my cold idle valve be sticking open?

No, this is the result of the 5mt swap. We have been dealing with it for years. Until I can hack a stock ECu with a 5mt in it I really cannot do much to fix it

Tom

What is stopping you from hacking it? No time? No clue? I don't know anything about ECUs so...?

not time, don't have my ROM reader/writer yet. Plus, I don't have a stock car to work on

Tom

Tom,

Have a gander at my last post here:-

http://www.subaru-svx.net/forum/show...453#post507453

Cheers, Trevor.

Gee, I'd love to have your problem:D

+1
arg damn minimum charter count to post

well why don't you try what trevor was suggesting in that link.... Looks to be a good fix

Tom

I just remembered a simple test to find out if the idle problem is 5 speed related or a physical. Turn you off your enviro system if the car idles with it off then its the 5 speed issue if its doesn't then you have a air leak problem.
Tony

Tony,

What you are indicating is that the five speed problem does not exist when the enviro/AC system is loading the engine. :confused:

Is this in fact the situation, as this represents an important clue?

Yes it is very evident, also I think the stall problem is less if you run with the Eviro system off, this is what made me think the valve we are talking about in the other thread is over doing everything looking for a transmission load. I also supect but haven't confirmed that Tom's problem is the ECU is trying to pull the engine back fast so its cutting fuel. Because his engine is more responsive he is feeling the problem more. With the fuel thing I can't see any other choice but to rewrite part of the ECU code which will be real fun. Phil said it appears that the ECU works out a value but then over writes it in a couple of place in the program my guess is this will be Knock Sensor being to high and also the ECU wanting to slow engine fast based of the rate of speed drop and throttle gradient down curve.

Jeff,
I haven't had a high idle problem on any of the 3 5-speed SVX's i'd had/done....except the first one, and it was i had left one of the tubes on the underside of the snorkle loose...installed it, and everything was fine.

I'd keep looking for a vacuum leak...in the Eviromental system...the brake booster, the PCV system...

That's all I got...:confused:

hey huck what wires do i need to run to the clutch pedal, i think that might be part of my problem.