99 GT vert

i would hope so

Mustang3GT07

OP - What brand pulley is on your car? Also stay out of boost until you get a dyno tune.

Blackvenom01

delete

pitmitch910

+1 for dynotune motorsports, everyone ive ever talked to is had nothing but good stuff to say for them. hes pretty reasonable from what ive been told.

ohio03cobra

well i measured the pulley its 2 7/8 so i really dont think its the 2.3 i was told lol and its a motoblue pulley?an stayin out of the boost isnt going to be a problem lol havent got to drive it in like 5 months now due to weather an i wont be driveing it till its fixed since its not a good idea to drive it like that but you guys are alot of help ill keep ya posted on what goes on but have to bare with me moneys tight so it might take longer than i want lol

shawbotusmc

Hey Ohio03,
I got an 03 Cobra w/ a 2.6KB w/ "boost-a-pump", BBK intake, full 3" JBA exaust and an aftermarket mass airflow sensor... and I'm running into the same issue. I bought it used and it had most the mods done to it already. Right around 3500 in the RPM range I get a hard "bump" and the fuel pressure guage zeros out for a split second. So I can either Puss-foot it or drop the hammer w/o getting the "bump". Have you figured anything out yet? Sounds like it may just be a tune issue, but I wanted to get some info before I dump some money into a tune-job.

Blackvenom01

same thing with you man thats def a tune issue...