I just got my Hondata put in and tuned yesterday with my 9psi JRSC and my tuner doesn't know and Hondata doesn't know why at about 10-12 inHg Vaccum it stutters for a moment until I get to about 9 inHg of vaccum and goes away.

Has anyone else had this problem, only on '99 GSR's?

I think it has something to do with Emissions, but not sure.

Thanks for your help.

 

Anyone Please?

 

who did your hondata tuning? let's se your dyno sheet with air fuel ratio.

 

We have seen that running too rich at part throttle can cause a hesitation. Typically columns 3 and 4 will need to be leaned out.

Has your tuner street tuned with a wideband?? The correct load is difficult to simulate on a dyno.