OK i have a h22a and everytime i start it in the morning the idle fluctuates from like 2000 rpm to like 800 until it warms up a lil bit.and when i take off from a start it sputters for a sec and between 1500 to like 2000 rpms then takes off what could cause this i have a cel code 41 which is the o2 sensor heater but i dont think it could cause this does anyone know whats could be causing this.

 

man i got the same problem right now, but im throwin a 23 (knock sensor) some one told me that when your cel is on that your computer runs rich "safe" mode, that could be it, idk, who put the jdm in it?

 

i put it in. and i dont think its in safe mode because vtec still kicks on and everything.

 

yeah i just got done putting my h22a in, my vtec goes out as soon as the cel is on, i can't get it to stop running super rich, do you have a littel valve ontop of the fuel rail that has vacume coming from the egr valve and going to the fuel pressure reg? i am going to redu all my vac lines tommorrow based on the helms manual, hopefully that will get rid of the rough idle, idk

 

hey thanks i have the egr and that what u said hooked up except #8 which is the intake diaphragm i dont have the actual piece which the line goes to

 

o2 sensor could cause that. Your ecu might not be lying right to your face....its just a possibility maybe. O2 sensors arn't too much money. If your obd1 you only need to replace one.

 

fix your CEL first, then go from there

 

well i don't know why but i had the same problem and after fixing my knock sensor it went away.

 

ok so here is what you need for the jdm vacume, i just did mine and got rid of a bunch of crap! http://members.***.net/twistedbydesi...uumdiagram.jpg[IMG]file:///C:/Users/jeremy/AppData/Local/Temp/moz-screenshot.jpg[/IMG]

 

definitely sounds like an EGR issue.. I had a similar problem until i removed the block off plate i had on the EGR. so it could be vacuum