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Old 17 Apr 2011, 01:31 pm
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Default My honda civic is idling weird?

I have a d16z6 and lately when I'm at a stop the car will jump from 1000 rpm to 2000 rpm and I don't know how I could find the source of the problem its on my 93 civic hatchback
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Old 17 Apr 2011, 01:46 pm
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idle air control, or iac.. needs replaced or cleaned
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Old 17 Apr 2011, 02:01 pm
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Your idle air control valve is directly behind the throttle body. theres 2 bolts and 2 hoses connected to it. Take that sucker off and spray it out with carb cleaner untill it comes out clear and no more black stuff.































If that doesnt get rid of it also try bleeding your coolant (leave the cap off while its running until there are no more bubbles coming to the surface)
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Old 17 Apr 2011, 02:16 pm
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Most common cause: Idle Air Control Valve needs to be cleaned...















http://www.honda-tech.com/showthread.php?t=1575913































2nd most common: vacuum leak.















-Fix broken hose or leaking gasket.































3rd common cause: air pockets in cooling system.















-Bleed cooling system .
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