kingturbo Posted November 22, 2007 Share Posted November 22, 2007 I just bought a 1986 Civic Si and it runs great. When I start up the car in the morning it idles high for about 3-4 minutes just fine. There after the idle starts to jump around. It acts like it wants to come off fast idle and drops under 1000 rpm's, then jumps up like I blipped the throttle up to 2000 rpm's and then drops again and repeats over and over again. I work an hour away from home and take the interstate 70 mph +. When I arrived at work the car is still has the idle that fluctuates. This is my first Honda and I like it a lot. The car is a 5-speed and has 176,XXX. I am very mechanical and would appreciate any help. Thanks Link to comment Share on other sites More sharing options...
Kastigir Posted November 22, 2007 Share Posted November 22, 2007 I just bought a 1986 Civic Si and it runs great. When I start up the car in the morning it idles high for about 3-4 minutes just fine. There after the idle starts to jump around. It acts like it wants to come off fast idle and drops under 1000 rpm's, then jumps up like I blipped the throttle up to 2000 rpm's and then drops again and repeats over and over again. I work an hour away from home and take the interstate 70 mph +. When I arrived at work the car is still has the idle that fluctuates. This is my first Honda and I like it a lot. The car is a 5-speed and has 176,XXX. I am very mechanical and would appreciate any help. Thanks Need to check the idle air control valve. It's either gunked up and needs cleaned, or replaced. Link to comment Share on other sites More sharing options...
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