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  • Users: RonQ
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  1. RonQ

    tight plug gap required, why?

    Thank you everone, for fine help. I'll go for a 0.040-0.045 plug gap and check in 25,000 miles. I'll be away for a few days... CUL
  2. RonQ

    tight plug gap required, why?

    PS. any one know of a Chrysler/Plymouth knowledge base, where I could deposit this and/or find similar - "known-to-us" - problems and fixes?
  3. RonQ

    tight plug gap required, why?

    On my last post I forgot to mention that the plug boots have an integral well seal - so no way to see or hear any arcing/fireworks. With tongue in cheeck: the wires didn't go bad, just one boot. In the 'old days' one could just replace the bad boot; but no such thing here because of the length...
  4. RonQ

    tight plug gap required, why?

    This engine design has the plugs on the bottom of 4 3/4 inch deep hole. The plug wire boot is about 4 1/2 inch long, and the boot covers 3/4 of the porcelain plug insulator. I found carbon track on the -inside- of the boot. The track was going from the top of the plug, basically by-passing the...
  5. RonQ

    tight plug gap required, why?

    Thanks for help to everyone for sticking with me. It was an hour just before Autozone closes. So I rushed out on 20 mile trip to closest one. Got new set of plugs (champions RC12YC5) and set of wires. Changed plugs with .050 gap checked. Still same problem. Installed new wire set and presto...
  6. RonQ

    tight plug gap required, why?

    Engine won't run decent at .030. I understand that .018 is small, but that is the "happy" medium of usefull performance. I tried .015~.014 and that is really too small. 0.018 just hits it right in this case, but have to regap every 5000 to 8000 miles to compensate for wear. I'll get a...
  7. RonQ

    tight plug gap required, why?

    BTW at .50 plug gap engine idles ok, but drivability is poor, with cylinder missfire diagnostic at different cylinders. Poor drivability is: acceleration produces misses. Has any one seen graphs on compression versus plug voltage needed to fire? It feels like, since head gasket change, the...
  8. RonQ

    tight plug gap required, why?

    I have tried those tips, changed plugs to new ones, changed the dual coil pack, tested the plug wires by swapping and with ohmmeter test, swapped the OBDII module. I have looked with my oscilloscope and see the plug voltages on the primary side (from the OBDII module). If I knew what rise times...
  9. RonQ

    tight plug gap required, why?

    '98 Plymouth Voyage, 2.4L, near 95,000 miles engines misses with ODBII error: "Cylinder 3 missfire". Self help needed since dealer support with diagnostic gives no answer. Changed coil, plugs, ODBII, tested water temp and MAP sensor with replacements. Nothing found. Since...

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