This 1997 Jeep Wrangler came in with the complaint that the engine would buck, jerk and sometimes stall while driving down the road. The customer also stated that it seemed to happen more on rougher roads. I checked codes and found no codes stored. I also found that the codes had recently been cleared. Time to start inspecting. I saw nothing obvious so I started the engine and commenced to moving the harness around some ( sometimes referred to as a wiggle test). Moving the harness around did duplicate the problem and I isolated the wiring problem down to this particular spot at the rear of the intake manifold.
I disconnected the wiring at all of it’s termination points and lifted it up to see what was going on.
Looking at it as close as I could I thought I saw the problem but was not sure.
I could see the rub and arc marks on the vacuum fitting and the intake fitting boss.
A very close inspection found this and several other bad spots in the harness.
I separated all of the wiring. A little cutting, splicing and taping and I was ready to reassemble.
After the harness was taped back up I installed split loom and loom clamps to finish the job. Looks pretty good, Huh
Another view to show that the harness is repaired protected and positioned away from the metal it originally shorted out on.