Rough idle at start then is fine

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SUBYLUV871
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Posts: 380
Joined: Fri Oct 07, 2011 8:01 pm
Location: PORTLAND, OREGON

Rough idle at start then is fine

Post by SUBYLUV871 »

hey guys, the wifes car a 1998 legacy L wagon 2.2 automatic is running funny when it starts. like a vacume leak, idles below a G and bounces for a sec then goes back to normal. with a rich exhaust smell too .no check engine light or any other speical lights. it dosent do it all the time wich is the weired part. i did new plugs ngk with propper gap and wires. fuel filter. knock senser. could it throw codes even with no light? the car runs fine all the time. it does it when its cold and warm. any hints would help me out alot. thanks. its got like 150k on it and its an automatic, non turbo. hope thats enough info.
Cheep quality aint good, Good quality aint cheep
1998 legacy l wagon
1988 ford ranger prerunner (my baby
)
1994 legacy GT non turbo wagon
Legacy777
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Re: Rough idle at start then is fine

Post by Legacy777 »

Any idea if the coolant temp sensor has ever been replaced? Might not be a bad idea to replace it. Your symptoms aren't exactly like a typically bad coolant temp sensor, but it can't hurt. They're about $20 from one of the online subaru dealers.

Have you checked the IAC valve or cleaned it?
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

If you need to get a hold of me please email me rather then pm
SUBYLUV871
Second Gear
Posts: 380
Joined: Fri Oct 07, 2011 8:01 pm
Location: PORTLAND, OREGON

Re: Rough idle at start then is fine

Post by SUBYLUV871 »

I'm on it. I'll let you know what happens . My buddy works at the auto parts store, so I'm goin to a see if he can plug into it. See what happens. Thanks
Cheep quality aint good, Good quality aint cheep
1998 legacy l wagon
1988 ford ranger prerunner (my baby
)
1994 legacy GT non turbo wagon
SUBYLUV871
Second Gear
Posts: 380
Joined: Fri Oct 07, 2011 8:01 pm
Location: PORTLAND, OREGON

Re: Rough idle at start then is fine

Post by SUBYLUV871 »

negative on the temp sensor. whats the IAC valve. i noticed last night it was getting warm but when i floored it it would get a flow of coolant and go back to bout half way on the guage. im getting a thermostat tonight maybe its sticky or somthin.
Cheep quality aint good, Good quality aint cheep
1998 legacy l wagon
1988 ford ranger prerunner (my baby
)
1994 legacy GT non turbo wagon
Legacy777
Site Admin
Site Admin
Posts: 27931
Joined: Tue Oct 15, 2002 11:37 am
Location: Houston, Tx
Contact:

Re: Rough idle at start then is fine

Post by Legacy777 »

Make sure you get an OEM Subaru thermostat. Do not use a generic autoparts t-stat.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

If you need to get a hold of me please email me rather then pm
SUBYLUV871
Second Gear
Posts: 380
Joined: Fri Oct 07, 2011 8:01 pm
Location: PORTLAND, OREGON

Re: Rough idle at start then is fine

Post by SUBYLUV871 »

GOOD CALL. i went and got one lastnight. ill take it back and get an oem one. thanks. its a job for this weekend.
Cheep quality aint good, Good quality aint cheep
1998 legacy l wagon
1988 ford ranger prerunner (my baby
)
1994 legacy GT non turbo wagon
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