Follower of WatchJRGo on YouTube:
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Loaded question friend.
Lots could be out of place as a simple mistake.
So, start at the beginning and move methodically through the entire process again.
1)Is the engine at TDC
2)Are ALL the plugs wires (and additional wires) in the correct location and securely fastened?
3)Do the timing marks line up?
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mechanics.stackexchange.com:
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Check the compression in each cylinder with a wet and dry test
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reddit:
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Get a new mechanic for starters
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Pull the spark plugs and look inside the cylinders. If the old spark plug tube seals were leaking badly you could have old oil in the cylinders that's being burned and fouling your plugs. Also check the condition of the plugs, if they are black and sooty or wet with oil thats probably why you're getting misfires. If they look fine and your cylinders are relatively clean then it's time to do some more investigation
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Replace spark plug wires entirely and see what happens they're cheap and easy.
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You should probably not have cleaned the wires with hot soapy water. I’d say you now need to replace them.
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If there is oil on the electrode tip, the rings or valve guides are likely worn out and fouling the plugs.
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Oil in the tubes does not put oil on the tips of the plugs.
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AxleAddict:
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Closely check the distributor cap. it can also cause problems when hard to notice cracks and traces of carbon mess up with the spark. Since the problem is concentrated on those three cylinders, you may want to check the valve train components for those three cylinders. Make sure the valves are operating as they should. If possible, download trouble codes, just in case there's a pending code.
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2CarPros:
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This sounds like a problem with your spark plug wires. You have replaced every other component of your ignition system except the spark plug wires. They should be changed every time you replace the spark plugs. Try this and get back to us with how everything turns out. We can go from there if needed.
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FreeAutoMechanic:
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Have you ever replaced the gaskets? Maybe the hoses?
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Three people said to check the wires, although one said that I ruined them by washing them. I only did that because I had found several comments saying that it was safe, but taking free advice from strangers on-line carries risk.