2.5 NA RPM hang normal?

[STL97outback]

5 speed outback wagon. I know in the morning, high idle 1500rpm, but settles down once warm.

However, it between shifts (upshift) the rpm hangs up for a bit before coming down. Is that normal to boxer motors?

Also on highway, driving at 70mph 5th gear, coming up to exit ramp, put in clutch and put in neautral. As car is coasting, idles at 1500rpm. Comes to stop, slowly gets down to normal idle.

Normal behavior?

[impreza_GC8]

Yes normal. The revs hang slightly less with a lighter crank pulley, I noticed a small difference when I put the Group A pulley on my Impreza, however the main reason for it is the flywheel. We have a nice big heavy flywheel that reduces the shock of gear changes on the all-wheel drivetrain. Lightened flywheels help however Subarus do not respond well to flywheel changes that are ligther than 11-13 lbs. It seems the cars benefit from that extra mass to keep the drivetrain turning.
As for the clutch in thing. Yes the revs drop, then drop a little more. Thats normal for my Outback as well and I'm not even running the same ECU as you.

[T_F_E]

yep all seems normal to me

[STL97outback]

Appreciate the help. Thanks guys. My other cars don't do that, so wanted to make sure the Subie was normal.

[T_F_E]

My other cars don't do that, so wanted to make sure the Subie was normal.
most important thing to know about owning a subaru ;)

[rougeben83]

The hanging is normal because of the 25lb flywheel subaru puts stock on these things...

[marklj]

What generation is your legacy? My 03 doesn't really have those traits.

[T_F_E]

The three of this above that have this problem and say it is normal have 97's

[STL97outback]

Yeah 97. Other owners said, normal, thats good enough for me.

Anyone know how to adjust the headlights, my bubble balance on both are pretty off.

[jey]

I am convinced that the RPM hang is the ECU doing something with the idle control valve to help keep the revs up for smoother shifts. It seems to hang about the same when the A/C is on, so the ECU is definitely compensating at some point. Theoretically the extra load of the A/C should cause the revs to decrease faster but they don't.

Either way, it's normal.

There should be plastic screws on the headlight assembly to adjust the headlights.

[STL97outback]

I am convinced that the RPM hang is the ECU doing something with the idle control valve to help keep the revs up for smoother shifts. It seems to hang about the same when the A/C is on, so the ECU is definitely compensating at some point. Theoretically the extra load of the A/C should cause the revs to decrease faster but they don't.

Either way, it's normal.

There should be plastic screws on the headlight assembly to adjust the headlights.
Thanks. I saw some very LONG screws..but they didn't turn. I will look again once this sat. Basically burried during the week in work

[99gtlimited]

5 speed outback wagon. I know in the morning, high idle 1500rpm, but settles down once warm.

However, it between shifts (upshift) the rpm hangs up for a bit before coming down. Is that normal to boxer motors?

Also on highway, driving at 70mph 5th gear, coming up to exit ramp, put in clutch and put in neautral. As car is coasting, idles at 1500rpm. Comes to stop, slowly gets down to normal idle.

Normal behavior?

seems like normal behavior in closed loop but if the engine was warmed up and driving on the freeway for a while i don't see why it would idle high after exiting...

get used to your car acting weird when it's cold it always will, but if it keeps up when warm i would start to be concerned. could be your t-stat acting up telling your engine it's not fully warmed and sends it back into closed loop??? this is just a guess

doesn't seem like you have a real problem yet, but maybe you will soon...

[99gtlimited]

In my experience, with the defrost or a/c on these symptoms become exaggerated, especially when cold.

also, I think this thread is more appropriate for the n/a motor drivetrain section...... :smt017

[STL97outback]

seems like normal behavior in closed loop but if the engine was warmed up and driving on the freeway for a while i don't see why it would idle high after exiting...

This is my concern as well. Doesn't make sense at all.

[rougeben83]

In my experience, with the defrost or a/c on these symptoms become exaggerated, especially when cold.

also, I think this thread is more appropriate for the n/a motor drivetrain section...... :smt017

+1 when I first got the car A/C would absolutely make the revs drop down faster. I found myself shifting about 300-500rpm higher to compensate to get a smoother shift...

[HeresMyMind]

to aim headlights, park 25ft from wall. measure the height from the ground to the center of the headlight. the top of your headlight "blobs" on the wall should be 1-2" shorter than the height u measured earlier.

-B

[STL97outback]

to aim headlights, park 25ft from wall. measure the height from the ground to the center of the headlight. the top of your headlight "blobs" on the wall should be 1-2" shorter than the height u measured earlier.

-B
Can't you just use the head light bubble level thing
? :smt017

[HeresMyMind]

those are inaccurate. everything little thing effects those... tires. suspension..weight in the car. temperature. even if you are on a slight incline...

-B

[STL97outback]

I was going to adjust them this weekend, but I just ordered coilovers, so once those are in, will do the lights at the same time.

[winston856]

I'm bringing this back from the dead instead of starting a new thread because my '97 GT is going through this same phemonenon.

The RPM's will hang after coming off the freeway or even randomly in traffic when the car's warm.

What I mean is the RPM's will stay around 1500 when rolling up to a stop sign and won't drop to normal unless you sit there for at least 10 seconds or so. Then they work their way down to idle. After that they drop to idle like normal. This will happen randomly throughout the same drive or when the car's shut off and started again.

I'm not sure what's affecting it that's why I'm bringing it up, I think it has something to do with the speed sensor perhaps. Because if the car's rolling even at 5MPH or so they don't drop to idle unless I'm stopped.

[jey]

Almost all Subarus I've driven seem to do this to some extent, though if it's more pronounced than usual you might have a lazy/dirty IAC valve. Try giving it a good cleaning.

[Huffer]

Yep, IACV needs a clean.