Hello everyone , sorry to bother you , i have an 02' x type 2.5 v6 , 5 speed manual transmission ,120.000 miles on the clock , with an extremely rough idle when the engine is cold , it sounds like it missfires alot (allthough no missfire codes stored), like running on 3 cylinders , when i try to rev it up , it's running on those "3cilynders" up to 2000 rpms , above 2000 rpms it backfires (not every time) :))) and the other cylinders start to ignite , and it runs.... "normal" if i keep it revved past 2000 rpm.
This happens for about 5 minutes when i start the car cold , after that everything starts to settle down , and it runs OK , but it lacks power on acceleration...
I have no faults stored on the ECU , only an abs sensor on the rear left side
I have tryed :
smoke test on the intake , no leaks ; replaced the fuel pump , replaced MAF sensor , replaced MAP sensor , replaced spark plugs (gapped plugs 0.055) , replaced fuel pressure sensor
Still haven't done a compression test , any other ideas? Anyone??...