Originally Posted by lt1silverhawk
I gotta mention that when the timing was done by ear last summer, the truck ran perfectly. No issues whatsoever with driving. I drove it to work and around the block and whatnot. The only trouble it gave was the occasional refusal to start, but that turned out to be only super-old battery and ground cables and weak battery posts, which were replaced.
What has been changed between when it ran OK and now?