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Old 03-28-2009, 05:25 AM   #1
banman
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2006 Legacy GT
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Default Question for 1st Gen Legacy owners

Who else has one besides know1?

Anyway, a friend of mine just got a free 1993 Legacy wagon (I think it's an L, so don't get too excited). I'm trying to troubleshoot it by proxy . . .

Anyway, apparently the engine occasionally stalls when warm when the clutch is depressed. He thinks it might be the idle air control unit, but I'm not so sure. Any other ideas, or diagnostic tests to narrow it down?
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Old 03-28-2009, 05:38 AM   #2
MacNews
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I've got a first gen Legacy, but no knowledge so I can't help.

Bump!
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Old 03-28-2009, 07:54 AM   #3
bender
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the first thing that I would do is check the throttle body.
is it badly gummed up?
is it coated in oil? (blow by)

if it is, try cleaning it with carb cleaner
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Old 03-28-2009, 01:43 PM   #4
Splinter
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Take off the IAC and clean it out with some brake cleaner (not carb cleaner, it leaves a film)
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Old 03-28-2009, 02:28 PM   #5
GlobalWaste
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Quote:
Originally Posted by Splinter View Post
Take off the IAC and clean it out with some brake cleaner (not carb cleaner, it leaves a film)
gasoline works really well too
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Old 03-28-2009, 05:31 PM   #6
Joynt93
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Quote:
Originally Posted by Splinter View Post
Take off the IAC and clean it out with some brake cleaner (not carb cleaner, it leaves a film)
that was my first thought too
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Old 03-28-2009, 07:03 PM   #7
banman
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Thanks, guys. I've passed on your suggestions and I'll post up with the results if I hear any.

He also updated with a few more specific details which might help:
Quote:
So it seems the stalling happens only when pushing the clutch in while braking, when the engine's moving at high-ish revs. So what happens is the engine slows to idle, overshoots a bit, and then stabilises. But if it's coming from 2000rpm or more, it
overshoots far enough to stall.
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Old 03-28-2009, 09:35 PM   #8
brendan_mac
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It's also possible there's a vaccum leak. Old OBD systems like that can give you a fluctuating idle. One solution would be to increase the idel a bit if you can't kind the leaky hose.
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Old 03-28-2009, 10:41 PM   #9
Splinter
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I found with the several first gen legacys Ive had, a vacuum leak simply causes a higher idle.
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Old 03-28-2009, 11:28 PM   #10
Joynt93
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thats like running my bov on my leggy, if i hit the gas and quickly release it will stall or try to fix itself.

so im wondering if there is a good vacuum leak although it should idle rough if it is.

maybe his alternator/ battery system is real bad and when he hits the brakes, to much juice is used and stalls the car?
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Old 04-05-2009, 04:24 AM   #11
banman
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Ok, good news is that cleaning the throttle body seems to have fixed the problem.

Bad news is that he discovered that the oil level was almost off the end of the dipstick, and there was almost no power steering fluid left.
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