Engine idles at 2500 rpm. When finally gets warm, idle may go down to 1500 rpm
That would be your engine "choke" functioning. It's not a problem. The choke engages when engine is cold and shoots extra fuel to the cylinders to idle the engine up especially in cold with. Once the engine has sufficiently warmed up, the engine will idle back down.
SOURCE: idles up and down after warm up
THE COOLANT LEVEL IS LOW
on the older hondas even the newer ones idle speed is coolant temp controlled.
when the engine idles up the electronic coolant temp sensor is submerged in coolant and reads warm, so the engine computer idles the car down. the coolant level if low than drops from around the coolant temp sensor and it says the engine is cold, so the engine computer idles the car up.
which results in the constant rise and fall in engine rpm.
ADD COOLANT TO THE RADIATOR AND WATCH THE CAR MAGICALLY FIX ITSELF.
SOURCE: 1998 HONDA ACCORD EX V-6
Sounds like your automatic idle control valve needs to be cleaned. Common irratic idle issue. Just remove, shoot carb cleaner onto ports until comes out clean. should be able to move valve inside easily.
SOURCE: B16A SWAP NO VTEC,CHECK ENGINE LIGHT, IDLES @ 1900 RPM
Wiring faulty, sensor not connected or mismatch, the ECU will not operate normally until it get all required input from the various sensor.
SOURCE: Have a 1988 accord. Engine idles real high rpm
even with a use carb you should have had it reconditioned before installing it, and also replace the spacer gasket , other wise you are fighting a lost cause
535 views
Usually answered in minutes!
The warm idle should be about 800 rpm cold should be around 2200 rpm
×