Engine Misfire

March 28, 2007, 03:31:13 PM

Hey guys... I need some expert advice. I'm having a misfire on '86 5.0 V8. I just changed the plugs, wires, and distributer cap, but still getting the same problem. I had this before, and changed just the plugs and wires and the problem was gone for a while. any advice? i put in Motorcraft Copper plugs, no idea on the specifics. just got em from Autozone, and the Valucraft wires and a Duralast cap. I haven't modified the engine at all, just trying to get my ride smooth again. any help would be great!

Engine Misfire

Reply #1 – March 28, 2007, 04:41:59 PM

I'd be wary of the Valuecraft wires... Back when I worked at a chain-owned shop, we'd put on the Valuecraft wires to save the customer a few bucks, but we had so many come back with misfires, we gave up on the Valuecrafts all together and hadn't had any problems since. Some sets had mis-formed clips, crushed clips, improperly crimped clips, some clips were put on without the wire being stripped, things like that. We didn't have any problems with them up until about a year and a half ago. Before then, they were fine. Could be a coil going, or ignition module... there was a recall on those for a few years. I'd look for arcing around the plug wires and distributor first, then check the coil, have the ignition module tested, etc. Just my 2 cents...