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Old 03-01-2004, 05:33 PM   #1
Scooby Newbie
Member#: 51225
Join Date: Dec 2003
1999 outback

Default 99 outback. Rough idle when in DRIVE

I have a 99 legacy Outback 30th Ann. model with the 2.5 DOHC engine w/ auto trans. It has 131000 miles on it and has had all the recommended maintenance. It idles fine in P and N but when in D the idle gets very rough and really feels harsh. I have run the engine analyer twice with no faults or pending faults and it has new plugs and wires. There are no vacuum leaks and the IAC is working fine.
I have had the car to my local dealer. The head mechanic drove it and said it perfomed great. They could not find any problems and said that the rough idle in D was normal. I find this hard to accept as I would not buy a car like this.
Any help will be much appreciated.
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Old 03-01-2004, 10:29 PM   #2
Scooby Newbie
Member#: 19651
Join Date: Jun 2002
Location: PA
2002 WRX


That symptom says vacuum leak all day. I'd have a mechanic go over all of the vacuum lines to double check.
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