Hondata

hi i have a h22 all motor street car

stock bottom end with built head with skunk2 pro 1 cams

everything on the intake manifold has been blocked off except vacuum for fpr and iat sensor



the car has a terrible bucking problem with starting to drive aka taking off from a red light


the car violently jerks back and forth it only does it like 0-3% throttle and is very hard for it not to do


have you experienced this before and do you know a fix?

i have tried 3 different throttle bodys 1 being stock that worked fine on another car

2 tps

2 map sensors

tested for vacuum leaks


any help would be appreciated thank you

i have attacted a data long when it is bucking
also the calibration

with a voltmeter probe the middle wire on tps with it plugged in with key on engine off. set it to 0.5 volts idle and 4.5 volts wot. then upload this map. should fix it.

tps has been set at .5v idle and 4.5 wot and then calibrated in s300 for min and max

can i ask what you changed?

Well according to your posted map the tps wasnt set to stock specs or calibrated right?? I smooth timing tables and set tps overun and put min and max to stock .5 to 4.5

still doing it with the new map and adjusted tps

here are two logs

Have you calibrated the TPS in the software?

http://www.hondata.com/help/smanager/tp ... =tps+range

yup thats what i was doing before