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OK the change out was done this morning. I learned a great deal! I have replaced the plugs, the wires (magnecor 8mm) and the coils all at one time. Now I have codes 1300, 1301, 1303, 1305, and 1307. At first it idled real nice and smooth then it started to idle rough but it does not stumble at any given speed just lack of power. I also have all four 02 sensors on hand waiting to be changed. I cleaned the MAF but I did not replace it yet.
FWIW this morning it was stumbling really bad at higher speed wouldn’t even go over 55 miles an hour but now it runs is much is 70 without a single stumble like I said it’s just lack of power and rough idling
Did you have any misfire codes before you started the tune up? If not, you probably got some wires crossed or something.
Brian.
I had a 0300 & 1300 before this. I’m going to check the drivers side wires. I know we got them correct at the coils. Triple checked that but I might have mixed up a couple at the plugs...
You have either the wires reversed (1&7 and 3&5) or you have two bad coils as they fire off the same coil. This is the second post I have seen this week about this. Double check your wiring arrangement per this image
If you don't have the wires misarranged, you have two bad coils, which seems unlikely.
I actually used your pic to set up my wires. LOL! I doubt I have 2 bad, brand new coils. Gotta be something else. I will double check the wires one more time tomorrow though.
I pulled most of the SAI BS out of the way today and was able to get a better look at the coils and wires. 1 and 7 are definitely correct. I’m 99% sure that 3 and 5 are correct but I stopped short of swapping 3 & 5 wires at the plugs. I had other stuff I had to get to. I did adjust some wires to avoid arching and I swapped the MAF out of my 04 to see if that would help. I also bled the coolant some more. Took it for a test drive. Still has the same codes and it’s running rough.....but hey, at least it’s running nice and cool.
Just for good measure I’ll swap 3&5 wires and rule that out.
I installed just the 2 upstream o2 sensors and I have no codes and none pending. Kind of a pain to swap but worth the trouble. i think mine were still the originals...
I installed just the 2 upstream o2 sensors and I have no codes and none pending. Kind of a pain to swap but worth the trouble. i think mine were still the originals...
Thanks, Ive got all 4 new 02 sensors ready to install. People have said that it wont help because I’m not getting 02 codes but at this point I got nothing to lose. Ive even got brand new Magnaflow cats with Y pipe sitting in the box. If the 02s dont help, I’m sure I’ll get the misfires fixed before I fry them due to misfires. I have watched the 02 pages on my UltraGauge...but I have no idea what the readings mean. I can however, tell that they’ve been on the truck for a very long time as well.
02-02-2019, 02:38 PM
