Same coils. Police spec models got iridium plugs while civilian models got copper. Before they switched all them at the factory people who knew and didn’t want to change them every 30k would ask dealers to put the “police package” plugs in.
Where did you get those plugs from. Even getting them from the parts store can be risky if you've given boxes that look like they've been opened once as the cardboard looks creased or messed with. I wonder if you got fake ones. Real iridiums definitely should last way longer than 10k.
Yeah, a few years back I caught someone returning some fake Denso Iridiums. They bought the real ones from us, the cheap ones off eBay or something, presumably put the real ones in their car, and tried to bring back the fake ones for a refund. But they were very obviously fake. I know they did this as I’d sold them the real ones a few days prior and remember inspecting them before the sale as well. Inspecting everything on the way in AND out is the only way to protect both the real, good customers and the company. But, most people working at a parts store don’t care, so yes, be careful.
Pretty much. Technically a fine tip plug, like iridium, requires less voltage to fire, which would reduce stress on the coils leading to a longer life.
Replace the manifold with a junkyard known good part or have yours welded by somebody who is skilled at manifold repair. Why throw money at a junk truck?
The DS trucks don't typically break the manifold, just the bolts. On all of our work DS's, which all had this problem (snapped studs) they mechanic was able to reuse the OE manifolds and the whole job was under $700 CDN per truck.
