Phit, you're right the electrical connections have a huge impact on the way the vehicle performs. The numbers are there for reference only. If anyone does happen to actually use these suggestions, the best thing to do is perform the easier ones first. You can do the majority of them in an hour or less.
I have noticed that many people want someone to troubleshoot their vehicle without opening the hood. If you drive any older vehicle, you are going to have to work on it... or pay someone. This was the intent, give people a way to save some money. I still see folks changing sensors willie-nillie. I suggest keeping any parts changed prior to checking all this stuff. It will give you a cache of spares.
Many thanks for this information. I've read this thread whilst researching another issue but we have two ZJ's and I've absolutely no doubt that this information is going to get me home one day.
Some of these points I've already experienced and can verify that the information offered is 100% correct!
Thank you for the work you've put in typing this all up for us.
I well remember being a rookie and getting a new ride and thinking I was going to do a complete tune up and make it run better to only have it run worse.
Been there done that. Except it was a 68 Cutlass that one of my dad's coworkers had for sale. My dad drove it home for the weekend to let us try it out. It didnt run good, so I, being the adventurous teenager I was (without a lot of respect for someone elses property), decided I would buy it if a tune up would fix it. So I took it on my own to tune it up, though I had never worked on a GM. And of course I screwed it up. I forget exactly how it happened, but my dad got in it and it was cutting out big time. We worked on all afternoon and my dad was pissed, then he took it back to the guy not running right and I had to pay the guy's mechanic to fix it.
I also left out screwing with the timing, carb. and other things, that I did not really understand well at the time, looking for the problem thinking I did all that right and it must be something else .
Live and learn, or better yet maybe listen and learn from others mistakes .
I learned that the hard way and I would not change that for anything but I learned the hard way .