low idle

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208ss
First Gear
Posts: 99
Joined: Wed Jan 01, 2014 7:04 pm
Location: boise. id

low idle

Post by 208ss »

So after my car warms up at idle my car is running at 17/1-19/1 afr and has low idle around > 500 rpm.
What could be the cause?
And go...
1991 subaru legacy sport sedan
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bcmaxx
First Gear
Posts: 218
Joined: Wed Oct 24, 2012 6:30 pm

Re: low idle

Post by bcmaxx »

208ss wrote:So after my car warms up at idle my car is running at 17/1-19/1 afr and has low idle around > 500 rpm.
What could be the cause?
And go...
What is your vacuum sitting at?
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wtdash
Fifth Gear
Posts: 2349
Joined: Fri May 04, 2007 4:09 pm
Location: N. ID

Re: low idle

Post by wtdash »

Vacuum leak.
Turbo Subies:
'87 GL-10 Turbo - SOLD
'90 BJ EJ22T/DOHC & 5speed swap - SOLD
'04 FXT, Forged internals, VF39, STI TMIC, Cobb AP- SOLD
'93 Legacy SS - 5-speed, SOLD :-(
'02 WRX -SOLD
'96 BD-turbo'd-SOLD
'98 SF - NA-T
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208ss
First Gear
Posts: 99
Joined: Wed Jan 01, 2014 7:04 pm
Location: boise. id

Re: low idle

Post by 208ss »

Boost Guage is at 18 vac
1991 subaru legacy sport sedan
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robertpaige
Fourth Gear
Posts: 1232
Joined: Tue Jul 31, 2012 10:32 pm
Location: Portland, Oregon.

Re: low idle

Post by robertpaige »

Should be at 20ish. At 18 I would assume you have vacuum leaks. Do a smoke test
the guy who had the really low winestone SS on the corvette wheels
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