I'm new to the forum and had taken my '91 Sentra down to for inspection. Apparently the
mechanic hit one of the vacuum hoses when he was finishing up, as I later noticed a miss that
gradually got worse, but it surely didn't seem like a cylinder not firing.
I looked at the fuel injection system and around it at all the hoses, and sure enough, one was off; reconnected and I thought that was it. It seems my hoses must have been on the verge
of wasting away, as I found a couple of hoses that were starting to crack. Brilliant me had hoses pulled off of everything before I knew what I was doing.
Anyway, the diagrams showed the proper routing of the hoses and she has new vacuum hoses and runs fine now.
Thank you very much.