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HAVE YOU CLEANED THE IDLE4 SPEED CONTROL VALVE AND THE THROTTLE VALVE BUTTEFLY. YOU CAN BUY THE THROTTLE VALVE CLEANER FROM ANY AUTO PARTS STORE AND ASK TO BE SHOWN HOW TO USE IT CORRECTLY.
on a cold start car will idle fast till it warms up then will drop to about 1000 rpm, try increacing idle speed so when it warms and drops it should stay idleing
Is it revving up when the car is idling? Is the idle speed higher than it should be? If so, you either have a vaccum leak, or your idle air control valve is bad. Sounds like the second, but i'd take it by autozone and have them pull the check engine light codes to be sure. They do it for free. If they say its a vaccum leak, let me know and I'll explain how to find it.
Look for a hole about 11mm diameter on the throttle body with a brass colored, slotted plug in it. Turning the plug/screw clockwise with a flat tipped screwdriver should turn down the idle speed.
Possible speed sensor. I know the speed sensors are a problem with hondas. A new speed sensor is about $200 and can be easily replaced. It bolts to the top of the transmission on the firewall side. Do NOT buy an e-bay one. They are only about $30 but are junk
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