rough idle

[TG]

'95 Legacy 2.2 idles very rough like it wants to die, pop it into neutral
and all is normal. New plugs and wires. any ideas? Thanks. TG

 

[Todd H.]

'95 Legacy 2.2 idles very rough like it wants to die, pop it into
neutral and all is normal. New plugs and wires. any ideas?
Thanks. TG

Can't guess for sure, but it'd be worth disconnecting the battery for
several minutes, and reconnecting. This (at least on my model)
triggers the ECU to retrain itself.

Any vacuum leaks perhaps? Idle air control valve?

 

[hippo]

Can't guess for sure, but it'd be worth disconnecting the battery for
several minutes, and reconnecting. This (at least on my model)
triggers the ECU to retrain itself.

Any vacuum leaks perhaps? Idle air control valve?

I'm assuming it's an auto. Low idle speed would be my first guess, else
check through other suggestions here and then defer to a workshop in
desperation! Cheers

 

[TG]

I checked the coil pack and although he secondary resistance was within spec
the primary resistance was very high. Bought a used coil pack for $45 and 5
minutes later (I'm slow) the thing runs better than it has in years. TG

 

[Todd H.]

I checked the coil pack and although he secondary resistance was within spec
the primary resistance was very high. Bought a used coil pack for $45 and 5
minutes later (I'm slow) the thing runs better than it has in
years. TG

Sweet! Great stuff. Thanks for the followup.