tmcalavy
Well-Known Member
- Joined
- Oct 6, 2012
- Messages
- 872
- Reaction score
- 8
- Vehicle Year
- 93
- Make / Model
- Ranger
- Transmission
- Automatic
Little green, my 93 Ranger XLT with 3.0, has developed a hard miss that comes and goes. It shows up most after the truck has been run an hour or two, not hard but put down the road at speed, especially when the AC is on. Shows up most noticeably at stoplights, when you can feel it occasionally miss. Also stumbles slightly sometimes, but never enough to rob you of power. More annoying than anything else, and it doesn't seen linked to weather or temperature. Doesn't affect performance, speed or mpg that I can tell...just finished a day trip and it was missing at lights on the way back, but after being shut off at home for almost 30 minutes it started right up with no stumble, even with the AC on Max. Starts good and idles smooth. I checked the wires tonight after dark, no obvious shorts and didn't get a jolt from any when I checked them. Cleaned the dist. cap contacts and rotor not long ago...looks worn and the contacts were oxidized, but not now. I'm thinking age-related, maybe heat related pickup coil failure...my early 80's F150 suffered from that, but they had a different name for it back then. Any ideas or suggestions are welcome. Gonna check, clean and regap the plugs tomorrow. Running stock autolite/motorcraft plugs...ends of center electrode should be tapered, right?