Hello all, i hope you guys can help me with my problem. Sometimes when i start to stop at a light or sign, i push the clutch in and the RPMs will fall to 500rpm and then up to 1000rpm, sometimes it will fall to 500 then die. It will restart no problem and idles fine at start.
This is on a 97 GSR 2.0ltr, sleeved, pistons, rods, drag kit, hondata, 440's, walbro 255, springs and retainers. It has also been tuned.

 

my friends fully built sohc turbo setup did the same thing...we could never figure it out and it was annoying as hell..hopefully somebody can help out

 

does it die it if you just let it idle with no brake [pedal]?

 

Not sure, it happend in reverse with no brake.

 

IAC?? maybe...

 

What does your car normally idle at? Is the warm idle speed correct? If not the car will idle hunt and that will cause one to die randomly especially going into straight vacuum.

 

This sometimes happens before I tune a car. It might be too lean at idle and the car can't catch itself. If you can adjust it your self, bump up the idle and richen it up.

 

The car normally idles at 1000rpm. At cold start it will be at 1500rpm, after it is warm it will be at 1000rpm. And i can't tune the Hondata my self. Can i up the fuel with a fuel presure regulator, and if i do will that change my A/F ratio through out the whole RPM band?