1996 Sunfire had two injectors that were leaking fuel your mechanic said that they looked OK so replaced the O rings One is still leaking pretty badly Any Thoughts other than replacing the injector?

Re-seat them again and make sure the O-rings are new replacements for a proper seal

Agree: I had two go bad in my '96. Replaced them both and used new O rings. It solved the problem. My mechanic used some Vasaline type stuff to lube the O rings when she installed them. I don't know if this is absolutely necessary or not, but they

never leaked after we twisted on the injectors a little bit to get the O rings really seated. If the injector still leaks, I'd replace it. It's a $75 part, but worth the piece of mind and the improved gas mileage. Use a new O ring if you do replace the injector.