Leaking fuel injector.
I've a friend with a 2001 Camry. It has a V6, and automatic transmission. One of the fuel injectors was leaking (at the rail, I assume) so he tightened that. That stopped the leak, but now he is wondering if he should:
1. replace all the injectors (if so, how critical is this);
2. and/or can these leaks be cured with the installation of new O-rings?
Thank you, people, for any asistance you're willing to provide. !!
Christopher