i have mazda 3 2008 with auto transmission.
after drive for 10-15 mintues the rpm get lagging. (when the lag start i lost a little performance on car :: pushing the pedal the rpm goes to 4000 but after a sec goes to 3700 without change the pressure on gas pedal)
Visit https://www.youtube.com/watch?v=frEQPNeFoYA for check the video of this lag!
if i turn off the car for while the lag gone. but it become again after a long drive)
- i change the cylinder head but problem not solved.
- no error code.
- battery replaced
- i cleaned the throw body + MAF
- my mechanic said he cleaned the EGR too. but i'm not sure. it could be from there?
Q1: do i need to replace the MAF or MAP sensor? ( no ODB error code )
Q2: could it be from transmission?
Q3: WHAT ABOUT KNOCK SENSOR?
this problem made me mad.
UPDATE -> i change the knock sensor/o2 sensor but no luck.