cant find if anyone else had this same issue but i got the car flashed with 1+ 2 days ago after i installed the injectors and it ran great the whole way home. the next morning i start it up and start driving and it has incredible throttle hesitation everywhere. great boost when it spools, pulls hard but the throttle response is terrible. once it warms up it drives great again. is this something i have to live with or will the car teach the throttle body not to do that while in open loop operation. any other 1+ owners have this afterthe flash. stage 1 didnt do it btw.

 

I don't have that problem with my apr 1+

 

vacuum leak in fuel injection system?

 

Your car needs to ge used to the new flash, give it some time. it will be wierd for a lil while, until its get the timing and trim right

 

Mine sort of does that when it's warming up (for the first minute or two of driving). Then it's fine after that.

Also, I found that driving in sport mode helps a lot as well. Although I try not to do that too much now, with gas prices being where they are.

 

mines a stick so sport mode wouldnt really help me there. i realize it has to learn but this isnt a timing or fuel trim type problem. the car is just retarded when in open loop operation. it feels the same everytime. its like my TPS(throttle position sensor) doesnt work for a second then it comes to life and about kicks you in the ***. i really hate driving it when at first. just puts me in a pissy mood when i drive it and it doesnt do what i tell to. it also makes it look like i cant drive a stick cuz it bucks like hell when the throttle kicks in. its just pissing me off
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Mine runs rough at idle and sometimes wants to stall when cold. I think this is due to being really rich during cold starts. some of the guys I have talked to with my same set up have the same issues. It runs perfect warm tho

 

yo my 2.8 has the same problem, it definately just seems like the tps isnt doing its job, like the throttle body just isnt opening all the way or something, and than when it does open it drives perfectly normal, and i only have this issue sometimes, not most of the time at all.