I have a question -- at how many miles should the STOCK injectors be changed? or cleaned? My car has 190k on it and 100k on the 'new' motor -- are the injectors good? or should i have a service done? or replace them myself... I dont really trust those gas tank additives should it come to that I would like some recommendations... thanks

 

If you dont expierience any probs like flooding. surging. or missing when cold then I would just have them serviced. Mine whent after 156,000 miles but are beyond repair. I will have to get them re ingineered because i expierience all those probs.