Yup. The plugs are easy, and the injection cleaner works fine.

Since you're in Pasadena, you're close to two great options:

1) To do it yourself, BMA is in Glendale and has the parts you'll need
2) A great independent garage is BMC in Burbank. I've had major repairs done there and several tune-ups. I would actually swing your car by there and have them take a stab at it.

Good luck