So my 2000 SR5, 3.4, 230k. 6 months ago I had a shop replace the starter, and while I had it there I had them go ahead and replace the plugs and wires. They also did some coil pack work but from further investigation I think they only replaced some boots as the coils were not the same. 1 Denso and 2 others with no markings. All 3 looked pretty old, but I cant say 100%. The hand written receipt is hard to read and not clear on what he actually did with the coil packs. Im not going back to this shop as there is a bit of a language barrier and communication is tough.
So....... recently it started misfiring and running very rough. P0303 and 0300. I went ahead and ordered off brand coil packs from Amazon and another set of Denso wires thinking it had to be the #3 coil or coils. Replaced packs and the wires and still had the same codes and crappy idle and obvious misfire. My thoughts about the plugs is that they are only 6 months old so "should" be ok.
I was really focused on the #3 due to the code I kept getting so I figured I would pull just that one to see, and low and behold very oily. I replaced it with a spare plug I had laying around and it fired up and runs great. With that being said I am now more concerned about whats going on internally. I dont have an endoscope to look into the cylinders but just by shining a light and the naked eye its obvious the cylinder has carbon build up and looks shiny.
I did check my coolant and its low. Oil looks great and Im not getting excessive white smoke out the tail pipe. So I dont know.
At this point I have extra coils and wires laying around now. HAHAHAHAHAAHAAAA
With that said Ill be using it for my local grocery runs and to drive to work. I sure as hell dont trust it for any future long distance trips until I can have some one do a more thorough investigation than I can do.
Just thought Id share
Cheers
Curt
So....... recently it started misfiring and running very rough. P0303 and 0300. I went ahead and ordered off brand coil packs from Amazon and another set of Denso wires thinking it had to be the #3 coil or coils. Replaced packs and the wires and still had the same codes and crappy idle and obvious misfire. My thoughts about the plugs is that they are only 6 months old so "should" be ok.
I was really focused on the #3 due to the code I kept getting so I figured I would pull just that one to see, and low and behold very oily. I replaced it with a spare plug I had laying around and it fired up and runs great. With that being said I am now more concerned about whats going on internally. I dont have an endoscope to look into the cylinders but just by shining a light and the naked eye its obvious the cylinder has carbon build up and looks shiny.
I did check my coolant and its low. Oil looks great and Im not getting excessive white smoke out the tail pipe. So I dont know.
At this point I have extra coils and wires laying around now. HAHAHAHAHAAHAAAA
With that said Ill be using it for my local grocery runs and to drive to work. I sure as hell dont trust it for any future long distance trips until I can have some one do a more thorough investigation than I can do.
Just thought Id share
Cheers
Curt
