Originally Posted by m7ammed
Do you recomend I change everything, coils plugs anf injectors? Or just replace the defective ones?
If you have 138 injectors, I would replace them all. I wouldn't worry about the coils. If one coil does turn out to be defective at some point in the future it's fine to replace just the defective coil. The plugs are relatively inexpensive-if you want to throw another set of plugs in after replacing the injectors, go for it. Do bear in mind that there are calibration #'s on each injector that need to be changed in the dme when an injector is replaced. Your car absolutely will not run properly if you just slap a set of injectors in it with performing the calibration procedure.