Thread: turbo lag under 3000rpms

it´s normal that my car feels a little turbo lag under 3000rpms??? after that the car runs great, but if i`m runing in 2nd gear at 2500rpms and i press the pedal i dont feel a good responce until the tach reach 3000rpms.

i´m runing a t25 turbo, 370cc stock maf and a jwt ecu, 2.5 downpipe, the timing its set to 15 degree, ngk bkr7 plugs, i adjust the tps voltaje to 0.47 with tb closed and 4.1 tb open.

i´ll appreciate any advise

Sure your ignition timing is spot on? Could be a dead spot in the fuel/timing map. Mine would do that in any gear because it was running hella lean at part throttle before boost.

the timing was set a 15degree before i adjust the tps voltaje i´ll check ti again

thanks men

Try resetting your ECU, then start checking for vacuum leaks.

resetting the ecu done, and its the same, now i´ll check the vacuum lines cause i´m only getting 5psi.

Only 5PSI? That's a pretty descent leak, it should be going to 7psi on non-ball bearing turbo.

check for boost/vacuum leaks and report back when you find the problem, lol

i need to find that leak, its a big loss and there´s a 2002 mustang GT with some bolts who want to race against the barney-movil

Definitely sounds like a boost leak. You can just make a leak tester, it's really easy. If you are only hitting 5psi, it's probably a fairly major leak and you will be running rich.

Ghetto way of checking intake leaks:

let it idle, start spraying brake kleen, or tb cleaner at any spot you suspect a leak, your idle will jump, some times you won't notice idle increase, but if you have a way to watch fuel trims they'll jump when you find the leak, I've seen people catch **** on fire doing this, so watch out