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1999 legacy outback 2.5L M/T, problem is when I come to

stop, let foot off throttle...
1999 legacy outback 2.5L M/T, problem is when I come to stop, let foot off throttle apply brake push in clutch pedal, engine dies, if I crank engine with key from run position engine starts on two or three cylinders, if I turn key to off position and restart engine runs on all 4, it does not stall every time I come to a stop. shows idle air control system malfunction.
JA: Has the clutch been slipping? Are you having any trouble shifting?
Customer: no
JA: Are you fixing your Outback yourself? What have you tried so far?
Customer: New idle air control valve, replaced ECM
JA: Anything else you want the mechanic to know before I connect you?
Customer: cruise control not wor*****, *****'t know if these two things are related
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Answered in 18 hours by:
11/19/2017
tamaz
tamaz, Subaru master technician
Category: Subaru
Satisfied Customers: 1,294
Experience: Subaru certified,ASE Master technician,25 years experience
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There are a couple easy things we can do first,cleaning the throttle body would be first,using carburetor cleaner hold open throttle apply cleaner to a rag and scrub both sides of throttle plate and chamber do not spray the cleaner into chamber.After this is completed make sure throttle cables are adjusted properly, with the engine at operating temperature make sure there is about a 1/8' of deflection in each cable .Next we will relearn the idle which is very simple,let vehicle run 10 minuets without any loads (a/c,lights,blower motor etc...) the let run 5 minuets with a/c on cylcle key on to off then test drive and let me know if any difference is made,thanks

tamaz
tamaz, Subaru master technician
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Experience: Subaru certified,ASE Master technician,25 years experience
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Category: Subaru
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