No problem Jon.
Commentary not aimed at anyone:
The most difficult cases are those where poster does not say "my truck is running rough, need help". But launches into "testing" and wanting to know how. Then we get involved teaching testing instead of getting motor ruinning good after questions and targeted tests or..... replacement of parts instead of giving a course which takes weeks of study and practice. Jerry gets frustrated at times. Don't blame him. He is tying to cram weeks of training he used to do into one post. Cutting to the chase and instructing a test procedure to narrow down a problem. Posters don't perform the tests or they side track. If a person is not up on ignition too much, I go with "get new ignition parts and call me in the morning" approach. We don't know if it's electrical or not. Sometimes assumed by posters in post 1. We don't do that but get sucked into it. Posters head off on their own during the diagnosis phase. It's good to want to fix it on your own and learn on the way, but it frustrates the methodical diagnosis continuity of helpers trying help from their house. If you are following Jerrys advice, test as he says, report the result and wait for next test.
Even though post title is "Coils again!" it does not phase us. Even though there are electrical test results. It does not phase us. We stick to finding out what the motor does and does not do. It is stated in this case that motor is slowly losing power, "Stumbling under load". That is what a bad fuel pump does or other gas related issues do. Carb dirt. Failing fuel pump diaphram or..... lines/filters/tank outlet slowly getting blocked off or..... building a vacuum lock in tank, bad gas, etc. etc. It can be ignition also or... loose wire, generator, battery... or worse. Forget checking ohms. Especially with an analog meter. If it runs it has spark. When you are ready, I would like to ask questions before you continue. Papa: We DO want to help you.
