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Discussion Starter #1
Hey guys,

picked up my first skyline a couple weeks ago but I'm having a time tracking down this low idle problem. The car seems fine when cold, but after it warms up it drops down to around 500rpm and seems like it stutters and misses randomly.

I've put new plugs in and gapped them, I've also replaced some of the vacuum lines as they were old and brittle. Going to pull the plugs later today to see if it's still running lean from an air leak.

I've read about cleaning out the AAC but won't increasing my idle just mask the problem?
What should I check next?
 

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FYI, you may have better luck posting this to the general section or tuning rather than just the USA.

IMO, i'd clean the idle control valve. 90% of the time this is going to be your issue.
 

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Discussion Starter #4
cleaned the aac and replaced the rest of the vacuum lines and was still hesitating a little and hunting. Cleaned the Maf and it seems to be doing much better. idling at a steady 800rpm now :drivin:
 
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