Hondata

i have a little problem with my s300. ive had it over a year, and WAS working great. heres the prob...i just finished some upgrades. did have a stock b17a1 running off of a wideband plx m300. what i did, added ctr pistons and buddyclub iv cams/springs. problem started when i went with the crower calibration, that was provided by spunkster.

engine runs fine.. however rev launch which is hooked up through the diag port doesnt work anymore. the check eng light first appears at start up, turns off via no codes. when i connect the diag port the rev launch doesnt work and the cel stays off as if code 0. i drove the car b4 swapping programs, ie with the p61 calibration....worked fine. now what? also, i checked, there are approx 5 volts @ diag port. thanks

92 civic cx

Have you tried going back to a different calibration?

yes i have. several times. down loaded newest version twice.

you cannot use the diag port if you are using it for launch control. You will need to disconnect that and wire it to the clutch switch. Changing programs should not have any effect on this as long as the launch control settings are the same.