Hey everyone I just joined and am in desperate need of some kind of advice. I have a 94 accord ex vtec and my idle is extremely off. About 5 seconds after I start my car the rpm's begin to bounce from about 1000 to almost 3000 and I have no idea what is going on??! Any advice please let me know I would greatly appreciate it...

 

Do you have any CEL's? Have you eliminated any possible culprits? You can try adjusting it using the Idle control screw. Located on the firewall side of the MAP sensor.

 

My first post here was with the exact same problem, but unlike the people that told me to go use the search and were ****** about it at times Im gonna tell ya.

It could be one or a combo of these thing
1. a clogged IACV
2. Clogged egr valve or maybe replace the sensor
3. Check the vacuum lines


Might have forgotten something tho

 

I havent had time to check anything out even tho it started a couple months ago because i have been very busy but its starting to get on my nerves now and it seems to be getting worse maybe things are becoming more blocked up i duno...anyway I am decent with cars but still learning a lot so if you guys could maybe tell me where all these parts are located...IACV, EGR VALVE, VACCUM LINES, not sure where the MAP SENSOR is so if you could help me with that possibly...i really appreciate all your help thanks

 

There's also a tutorial on cleaning the fast idle thermo valve on accord faq's...that could be it also.

 

make sure you cooling system is properly bled and free of air pockets

 

yea the cooling system is what my buddy was tellin me about he said to make sure the car is running when i fill it up because it eliminates all the air pockets which could cause a problem..also i think it may have something to do with my thermostat bc my car will heat up when idle with the idle still bouncing but once heated up and i begin to drive my temp. gauge drops down to cold?? any ideas?

 

I found out I have a cracked vaccum line which is not allowing my idle to regulate..thanx for your help guys

 

Glad to hear you found the problem, and thanks for taking the time to repost what solved your problem.