RPM goes to near 2000rpm itself? what happen?

[ej22t_]

Hi People, haven't post on the board for long time ago, some problem
just happened this week.
I have a 92 Legacy turbo ,5 spd. the car has some problem when stop
on the red light, somehow the rpm will goes to near 2000rpm. After I
step on the gas to over 2000rpm then it will drop back to under
1000rpm but it will rise up again.
Does anyone knows what had happen or why it occure?
I did the ECU reset but it still remain the same!
Please help!

Ben

[Rod_]

before you reset the ecu did you check for fault codes?

[ej22t_]

But I don't have any check Engine light turns on, how can I check??

Ben

[Josh Colombo]

go to my site www.surrealmirage.com/subaru under notes & tips, engine related.

First do the simply diagnostic, black connectors

If nothing shows up, do the active diagnostic, green connectors.

See if anything shows up.

Got any questions, just holler.

josh