Quote:
Originally Posted by jmkworld
i just went through this same exact thing. jb4 iso with bms catless dp. tach would jump and really harsh idle. put the car back to stock and took it in for warranty. dealer replaced the fuel sensor and the o2 sensors (even though the catless dp was still installed  ) Problem seems to be fixed. Have not had a chance to put the jb4 back on yet. |
Aww man, now you got me worried. I think I should do the same.