Hi all and yes I have searched this forum before posting this thread;
I have researched and ordered a 2001 Mazda Protege MP3 ecu / pcm (computer) part number FS9N-18-881 followed by either a B or C, the one I have on the way is from a 2001 mp3 Vivid Yellow and from what I understand it is one of about 1500-2500 Mazda Protege MP3's ever made.
My question is concerning the VTCS system. From my knowledge, the 2001 Protege MP3 never had VTCS in the intake manifold. Would I be ok with swapping the MP3 ECU into my 2003 2.0L Protege without doing the VTCS removal?
I did a pre test today starting the 03 protege in 40 degree weather. The VTCS was on (visually inspected before startup) the actuator closest to head / by fuel injectors was closed then open after the engine was warm. When the engine was cold i unplugged the green vacuum switch to the left on top of the intake manifold and the arm closed so i confirmed it is VTCS. So from my test, I am thinking that the VTCS is by default normally open and the MP3 ecu won't see it and keep it open by default.
My question is will I be ok after plugging in the mp3 ecu and not having done any kind of vtcs delete?
Thanks
Thomas
I have researched and ordered a 2001 Mazda Protege MP3 ecu / pcm (computer) part number FS9N-18-881 followed by either a B or C, the one I have on the way is from a 2001 mp3 Vivid Yellow and from what I understand it is one of about 1500-2500 Mazda Protege MP3's ever made.
My question is concerning the VTCS system. From my knowledge, the 2001 Protege MP3 never had VTCS in the intake manifold. Would I be ok with swapping the MP3 ECU into my 2003 2.0L Protege without doing the VTCS removal?
I did a pre test today starting the 03 protege in 40 degree weather. The VTCS was on (visually inspected before startup) the actuator closest to head / by fuel injectors was closed then open after the engine was warm. When the engine was cold i unplugged the green vacuum switch to the left on top of the intake manifold and the arm closed so i confirmed it is VTCS. So from my test, I am thinking that the VTCS is by default normally open and the MP3 ecu won't see it and keep it open by default.
My question is will I be ok after plugging in the mp3 ecu and not having done any kind of vtcs delete?
Thanks
Thomas
Last edited: