missfire cyl 2 and 3
 

My friend has a 98 camry. 4 cyl. my scaner shows missfire for cyl. 2 and 3. and a random missfire. i replaced the plugs because they need to be, fouled out. i tried replacing the coil pack for 2 and 3 thinking that was i, but it was not. still missfire. the only other thing i can think of would be fuel injectors? o2 sensor? but wouldnt the O2 cause just a radom misfire? not a specific cyl missfire?? how do i test the fuel injectors other than switching them with cyl 1 and 4? any suggestions would be awesome. thanks

What were the exact codes?

Often a Goggle search on the code(s) will result in specific info about them that will help you.

Use a section of rubber hose as a stethoscope to listen at each injector for proper operation.

Injector solenoid coil resistance should be 13.4-14.2 ohms.

A NOID light might be able to check wiring to the injector (a Google search will define what this is).

There could be other issues as bad coolant temp sensor, MAP (seldom fails), fuel pressure problems (check the pressure regulator), etc. The odds of 2 injectors failing at the same time are high.

id you mBY mess up the the order of the spark plug wires and dnow it is misfiring ?