* I'm trying to locate an exhaust back pressure tester (that I can afford) and will check the pressure asap. If the cat is the problem, I sure don't have any idea how to explain it to the customer, since he didn't come in for that. Any advice?
* Spot checked current pulse to #2 injector (with a noid light) and it looked fine (despite the misfire code on #2).
* An unrelated question came up. What does the coil fuse, #19 in the engine compartment fuse box, take care of? (The fuse is ok).