Witchhunter.com cheap insurance!
 

Well I bought a set of 1.8 tan tops to put in my 1.6 when I turbo it. PO claimed they worked fine. I sent them to witchhunter.com and boy am I glad I did. two were ok before testing and cleaning but two had "poor" spray and lower numbers before cleaning and they sent a little baggy back with all the pieces they took off and replaced and man that little baggy has a lot of stuff in it so I am feeling pretty good about the $76 they charged me ;)

Yeah i won't use used injectors without a cleaning for that reason, not worth the risk. I'd rather fork out the 60-75 bones instead of the couple hundred I'd spend on a rebuild.