ok it seems like my idle is screwed up a bit. when i start the car, it barely catches, and then it idles at about 600rpm. once it is warmed up it will idle at about 900rpm. i thought idle should be around 1000rpm all the time?? also, when i am driving. if i step on the clutch when coming to a stop, before the car hits 1000rpm. it will die. like if i step on the clutch well it is at 2000rpm.

so im not sure if the idle is just set too low?? or if its running too lean at idle?? or a combination of both maybe.

so how do i adjust idle?? do i do it threw the hondata. or do u just adjust the throttle cable??

and BTW, the engine is fully built, high compression, cams etc.

 

I'm having sorta the same problem. Mine wants to die when I press the clutch. It never happend when I was driving the car on the chipped ecu I had, only after I had my hondata tuned. I think my car is running to rich at idle, and/or idle is just not tuned properly. I had it tuned so the car would break in with the proper a/f ratio, but didn't dial in all the details. I'm taking it back for a re-tune soon, so hopefully that will fix it.

As far as your car, you can unplug the iacv, set your idle with the idle screw at 650, reset the ecu, and plug the iacv in. This should yeild you a correct idle of 750 +/- 50rpms. If not, its most likely a tuning issue.

 

thanx for the info. anyone else have any ideas??

 

There's an idle speed adjustment screw that meters flow to the IACV. If it's open too little, then it could cause the engine to idle low or die on deceleration.

Look at the IACV duty cycle datalog to see where it's at. If it's max'd out, then you should open up the screw a little so that the IACV doesn't have to be at or near 100% all the time.

The motor could also be running lean and/or not running enough ignition advance at idle. I've found this to be a major cause of the throttling-off dipping idle, even with the closed-loop feedback turned on. After I get the AFR's dialed in to a steady 15.0:1 to 14.7:1 at idle, the dipping is cured. You shouldn't have to run more than 20 deg's of advance at idle to get it to idle right.