2002 Chevrolet Trailblazer Q&A

2002 Chevrolet Trailblazer Question: I am getting P0302. What should i do? Where are the fuel injectors?

I replaced all 6 spark plugs since they were the originals and I has 143K on them. The misfire came back right away. So I replaced the coil pack on cylinder #2, I cleared the code but it came back. I drive about 3000 miles a year, and I have been putting fuel system cleaner in with almost every tank. I was thinking of switching fuel injector on cylinders 2 and 3 to see if the misfire travels to 3 to isolate the fuel injector as the problem. I just dont know where the fuel injectors are. Can someone show me where they are? Is this a good idea? -
Answer 1
Check compression and injector pulse first. Need repair man. for details. Adv. Auto good place to pick up manual. Then you will have it for other repairs. -
Comment 1
If you can get your hand in to unplug the injector wire (safely) while it's running , do that and see if you get any RPM drop when you unplug it -or- if you notice a brief jump in RPM when you plug it back in. and if you can get a test light on it check for pulse while running. ALSO , maybe befroe you go to that trouble , check the wires to it carefully for rodent sabotage. -
Comment 2
What engine 4.2? Never mind it has to be! -