Little Yellow Caps

1990 240 Wagon B230f W/197K I just put in a set of FCP Groton Injector seals, and I was wondering what people thought of the caps they give you. I cut off the old hardened ones that looked like they could have been original. These new ones seem loose. There is a small protrusion up into the cap that I think will recess the needle valve of the injector, and I can not tell if the injector will center itself in the cap when installed in the bore on the head. They just look counter productive to a good fitting. Car was rough at idle and getting 5mpg less then it did. I did not find any Vac. leaks, and when I shot some oil around the injector base at the head it seamed to idle better so I tried the new seals. Now it is harder to start and still idles rough. It's running rich, you can smell the gas in the exhaust. I am pulling the injectors again because I did not flush them. I'm going to try drawing cleaner up through the needle valve with A Mightyvac Brake bleeder. I read some one had success with that. As long as I had them out I was thinking of leaving the caps off, and maybe getting some Original Volvo parts caps to put on. After this it's swap out the AMM and see what happens. If I still strike out It's a new O2 sensor, or I guess I start replacing Vac lines One at a time,can't hurt and is cost effective. Any one know where to get direct replacement Vac lines.