So the other day, I went into town, and all of a sudden, I felt a misfire, all the warning light come on, etc. I limp home as i did not have my scanner with me, and it said misfire cylinder 3 P0303 if i remember right. Anyway, swapping #3 with #1 and the misfire moved to #1=bad coil.
So I ordered the proper Denso coils ( DENSO 6731309) for this engine, and 8 new plugs, (DENSO SK20HR11). To do a total repair, as the jackleg i bought it from had someone replace the coils with some aftermarket 1AAuto junk. 20k miles ago.
For a coil and plug job, this engine is pretty easy, not high creeper needed really. You need every extension for 3 to 12, a plug socket, and a 10 and 12mm socket.
In installing the new plugs, they felt a bit tight as they went down the threads.......squeaking and so on, everything to dont want to hear. I examined the plugs and found this:
Really, if you think on it for a moment, the spark has not really even been in the combustion chamber, it has been in the hole, so there was a good amount of nastiness in the threads. Luckily, I had a long cylindrical brush I have to AK47 gas tube cleaning, that work pretty good. In the picture you can see the discoloration of the new plug on the threads......that is how far up they were in comparison to where they are supposed to be. Surprised it ran at all.
Immedediate difference in startup and acceleration with the new stuff. Big difference. I typically do not use anti seize as it messes with the torque spec, but I did lightly coat two plugs which felt a bit tight.
It ran OK, for what I understood. Looking forward to see if there is any MPG gain.
I think i am lucky that this did not cause a much greater problem with the threads.
So I ordered the proper Denso coils ( DENSO 6731309) for this engine, and 8 new plugs, (DENSO SK20HR11). To do a total repair, as the jackleg i bought it from had someone replace the coils with some aftermarket 1AAuto junk. 20k miles ago.
For a coil and plug job, this engine is pretty easy, not high creeper needed really. You need every extension for 3 to 12, a plug socket, and a 10 and 12mm socket.
In installing the new plugs, they felt a bit tight as they went down the threads.......squeaking and so on, everything to dont want to hear. I examined the plugs and found this:
Really, if you think on it for a moment, the spark has not really even been in the combustion chamber, it has been in the hole, so there was a good amount of nastiness in the threads. Luckily, I had a long cylindrical brush I have to AK47 gas tube cleaning, that work pretty good. In the picture you can see the discoloration of the new plug on the threads......that is how far up they were in comparison to where they are supposed to be. Surprised it ran at all.
Immedediate difference in startup and acceleration with the new stuff. Big difference. I typically do not use anti seize as it messes with the torque spec, but I did lightly coat two plugs which felt a bit tight.
It ran OK, for what I understood. Looking forward to see if there is any MPG gain.
I think i am lucky that this did not cause a much greater problem with the threads.
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