speed3turbo,,, driving my son crazy
 

Hi, Please bear with me . I know I have no knowledge about these great machines BUT.........
My son was stationed in El Paso Texas - army . He traded a good running mazda 3 for the speed 3 turbo. It's back here in NE Ohio now and running bad. Him and a couple of speed 3 lovers just took it down and replaced injecters , fuel pump and a few other items because of the way it was running. This generally occurs around 4 - 5 then just ' flutters ' and rpms drop to 1-2 . You cannot pedal out of the loss . When he was driving it this happened continuously on the road. bad ju-ju . Just sitting it idles great .
Any thoughts here ? :banghead:

Is it throwing any codes? Maybe switch some of the coilpacks and see if you can isolate a bad one.

Can you name all the mods that the car currently has
and also can you list the "other few items" that his been replaced

Also if there is a code, that would help tremendously.

Which fuel pump was replaced? In tank pump or cam driven fuel pump internals?

Might want to also insure the injector seals (between injector and block) were installed correctly since the injectors were removed. That being said, it sounds like this was a pre-existing problem, but i'd hate for them to fix the root cause and be left with other subsequent issues.