Nissan Repair: 93 Maxima Spark Plugs, bosch platinum, heavy rain

Question
Hi, I am having a real bad headache with my maxima 1993 (I think it's a GXE, it have 4DSC stickers on the back). About a week ago my car stop running under heavy rain. I went to mechanic and he said I need to do complete tune up. I try to change spark plugs (bought Bosch Platinum twice), the car shook (like missing) when it on D or R but not in P (getting worse in a stop sign, seems like almost went dead). Just bought NGK R which I've been told it's a OEM spark plug and it still doing it. It was fine before I changed spark plugs. Do you have any idea what is wrong? should i buy cable wire as well. By the way the car already have slighlty defected fuel injector no 2 and 4.

Answer
Dam,

I would check the wires and probably replace them and the cap along with the plugs.  If you did not crack a plug on install, quite common with the head design.  I would also, get some injectors and replace those you say are defective.  Injectors will really mess things up if they short out or lean or over richen the mixture.  I personally have had bad luck with Bosch plugs and do not use them.  Just my opinion on my experience with them.  I love Autolite, NGK and Nippondenso.  I have not had problems with these.