I have a huge problem.. i just recently did my spark plugs and i couln't get the 2 rear passenger coils out, so i ended up doing 6/8.

a few years back, when it was time to do spark plugs i had ran into the same problem, and i ended up yanking the 2 rear coils out, but i had 2 buy 2 new coilpacks. So a simple spark plug change costed me almost $500.

Looks like its the same deal all over again..also, my car is running really badly..shaking and at idle my exhaust makes a weird noise.

I also have to buy 4 02 sensors as mine are finished! When i scanned the car it said slow sensor read out,

i was looking into buying 2 used coilpacks and i was wondering if they are all interchangeable? and also does it matter if it's from 98 or 99? My car is a 2000 gs400.

Same question regarding the injectors, i am looking into buying them used..
The 4 front injectors are different from the 4 rear ones?
does it matter which year? 98-2000?

**Also, would the 430 injectors work on my car? do i need to change the fuel rail as well? or i can just buy all 8 and replace?