95 with a 4.9. I had an intermittent starting problem. Turned out to be the pickup coil in the distributor. I replaced the distributor and adjusted the timing.
It starts and runs great, but now it idles a little fast. I don't have a tach so I'm not sure the rpm, but it is higher than before. Is there an idle adjustment? Will unhooking the battery reset the idle setting? Thanks for any advice.

 

unpluging the battery will reset the computer, it will run a little rich i believe until the computer relearns it, other thing to consider is stuck iac possibly

 

X2, you can pull the vaccum line off the IAC to see if it changes the idle if not its probably stuck open and you will need to replace it.

 

I took a closer look at the vacuum lines and a couple were disintegrating. Pretty much crumbled in my hand. I replaced those and the idle is back to normal.