Odd stumble after using rising rate

[tamadx]

I had a conversation with someone on another forum about this but i was wondering if any one else had some info on this.

tamadx 05-28-2008 09:58 AM
i just did rising rate yesterday and i am at 47 psi on the fpr spiking 24 psi of boost...the car loves it in boost but in 2nd and 3rd gear it causes it to stumble around 2k.....i am thinking the injectors just dont like to be that low? or something i really dont know.

StageSRT4 05-28-2008 10:03 AM
rising rate can make it a little trickyer to tune, how are your AFs and knock?

tamadx 05-28-2008 10:18 AM
oh the car loves it up top a/f's are 11.4's and no knock at all it, pulls hard now...i had it at 22 psi spike now with 24.5 ish lol it is great.....dtec is the only thing thats holding me back now beucase its harder to tune on the road with out some one.... let alone only doing a 3rd gear pull once in a while so i dont get pulled over...

the tuning aspect of rising rate i have under control i am just thinking that around 2000 rpms in no boost the fpr is at 47 psi and that might be out of the range for the stage 2 injectors..... its a very slight stumble that goes away instantly and really only happens in 2nd and 3rd gear....2nd is worse than 3rd...


StageSRT4 05-28-2008 10:44 AM
wierd, i have the S2/S3 injectors too, but my fp is even lower than yours. I dont get any stumble or stuttor


Am i in need of a fuel pump?
Injectors out of range? (prob not)
Other issues it might be?

Any thing would be great.

[MonsterLemon]

Boost only source?

[tamadx]

yeah it is tapped into the wga line and the car loves it in boost and every where else it is fine it just when i pass 2k it stumbles but its fine after....i am thinking maybe my dtec might have something to do with it... but i am not sure