Hey Scotty,
Question regarding electrical conductivity. 2010 Toyota Camry, 244,000 miles. Does the conductivity on the engine block deminish over time from heat, dirt, etc? I’ve been having strange problems with sensors and ignition coils failing, and discovered voltages at the coils varied depending on cylinder (1 is 12.5 while 4 is 11.2). Difference is location of the circuit ground on the engine. Made a 6ga copper jumper from the main ground wire at top left of the block to the lower right where cylinder 3 and 4 ground are bolted, and the voltage drop was eliminated.
Nathan
Does the conductivity on the engine block deminish over time from heat, dirt, etc?
no it's a gigantic hunk of metal. Conductivity is extremely good.
However, the contact surfaces between the block and wires and cables that carry electricity to other areas DO deteriorate. Eventually they may need to be inspected/tightened/cleaned up.
