I swap my 99 accord, the engine fires right up after but it has a pulsating annoying idle....it goes 1000k to 1500k RPM bouncing like crazy. I saw a lot of thread about this problem of honda civic and accord...so far check all my hoses, they are right on to were they suppose to be....Any suggestion I would take in consideratin..

 

How did you check all the hoses? They may be in the right place, but might have a leak. Get some carb cleaner and spray all the vacuum hoses and the gasket areas for the intake. That's usually when you find the problem. If that's not it, try checking your FITV (if your car has one) and your IAC valve. Cleaning the throttle body probably wouldn't hurt either

 

have you tried searching this site for an answer yet?

it has been covered like 1 billion times already


how to fix an erratic idle <<<<<<<<<<<<click this to search for your answer.

 

i have the exact same problem, bled the system, changedthe map sensor and theidle air control valve, cant figure it out???

 

Yah the map sensor is my next target..I bite the bullet and replace the IACV, still persist same idle. It becomes erratic once it warms up to operating temp.

 

Look in the DIY section for a post by me about setting the BASE idle.