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ridingmybucketlist
Joined: Fri May 18th, 2018
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Based on some information from a local source, I decided to check/change the spark plugs and as part of the mechanical restoration, the coil pack and wires, as well. On the drivers side, looking front to rear of the engine, the first two plugs were normal, but the rear plug came out with only a few turns of the socket, and half of the threads were clogged with dirt. Also, the shell of the plug was a dark blue/black from heat which had obviously come from escaping combustion gasses because the plug was not properly installed sometime in the past before I got the truck. When I moved to the passenger side, again from the front to the rear of the engine, the front two plugs were the same way. The rear plug on that side was fine. So with half of the plugs only halfway into the cylinder heads, it is no wonder the computer was picking up a misfire. The good news is that all of the plug tips and insulators looked really good with only a slight residue from oil intrusion from valve guides/seals. The engine appears to be in pretty good shape, thank goodness.
Going to pick up a thread chaser shortly and see if I can get all the plugs back in properly. I have a feeling this will cure the problem. I will post pics.
By the way, I never have been able to detect any codes.
Thanks again to all!
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I have been an electrician forever, and I still enjoy building, repairing and creating projects. Do a little welding and fabrication. My two primary hobbies are messing about with vintage motorcycles and attempting to do my blog site justice (ridingmybucketlist.com)My wife of 51 years and I are in our 3rd year of travels in our motorhome.