will this cause a vacuum leak if I don't
 

replace the injectors O rings, and insulators? or it will cause gas leak, instead of vacuum leak. the primary injectors are very tight, not moving at all. and the secondary injectors caught me some nervous cua they are not as tight as primary injectors. the new rebuild engine was started before, not seeing any fuel leak.

well, I am going to replace those for the secondary, since it is easier to do that. but I will leave the primary alone, cuz I already wired tight up all vacuum hoses.

still a risk?

thanks

new injector rings and grommets go for like 10 dollars. Its a safety issue because fuel can squirt from around a bad o-ring or a vac leak can occur from a bad gromet

Buy some starter fluid and spray it at the base of the injectors. Did the idle pick up??? Then they are leaking. R square the things then.

Ha ha...Hailers said R2.

I love it..

thanks, guys, I will go ahead to change all rings, and grommets, cuz I don't want to take any risk.