Discussion Starter · #1 ·
First off the car is a 1995 S320. I recently put new Bosch plugs (gap has been checked and re-checked) and the car started running badly with a very rough idle and no power. My next logicle step was to change the spark plug wires. About $160 later I completed the swap. The car ran even worse after I replaced the wires. I then made sure the firing order was right even though I changed only one wire at a time. I left the car running and checked the wires again, I noticed some exposed small gauge wiring running into the coil packs. I exposed more of those wires (I assume they are just the low voltage wires running to the coil packs) with the car running I wiggled these small wires around a bit and found it affected idle quite a bit. After further inspection I found that the two wires inside the looms running to the coil packs were not insulated and contacting each other. I guy I talked to at Performance Imports who I deal with alot in ordering parts and asking questions said he ran into the same problem and was told the wire insulators were biodegradable and made of soy bean. He wanted $500 for a new harness from the plugs to the fuse box. My question is could I use high temperature wiring and replace the uninsulated parts of the harness and basically create a partial wire harness? As of now the car will not turn over.