Help, stumbling after spark plug change.
08-09-2004, 09:00 PM
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Help, stumbling after spark plug change. Alright finally got the last spark plug in and now my engine is acting up. I have already re-torqued everthing and checked the wire connections. The engine ildes perfect in park. Once you put a load on it or stop at a light it will stumble once every 20 sec or so. At WOT only over 4,000rpm it startes to pop and stumble. The only thing that I notice was the gasket on the A.I.R pipes on both side are garbage. Could this be the problem.
08-10-2004, 02:18 AM
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did you change the wires while you were at it? you might have damaged one. it sounds like what my truck did when i had a plug wire breaking down. it felt like the tranny was slipping it stumbled so hard. check your plug wires one more time, better yet put new ones on it. it cant hurt to try it. hope this helps
08-10-2004, 09:13 AM
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A plug with too much gap will be sensitive to
cylinder pressure (weak or no spark) which
tracks load. Or, a gap elsewhere (like a bad
or mis-seated plug wire) will add to the
breakover voltage and elevate the sensitivity
of even a properly-gapped plug.
If you have a good scanner/logger program
you can watch cylinder-by-cylinder misfires
and pick out the weak cylinder plainly. If
not, just have to pull all 8 plugs, check gap,
pull all 8 plug wires, check resistance and
tightness of snap-in, etc.
cylinder pressure (weak or no spark) which
tracks load. Or, a gap elsewhere (like a bad
or mis-seated plug wire) will add to the
breakover voltage and elevate the sensitivity
of even a properly-gapped plug.
If you have a good scanner/logger program
you can watch cylinder-by-cylinder misfires
and pick out the weak cylinder plainly. If
not, just have to pull all 8 plugs, check gap,
pull all 8 plug wires, check resistance and
tightness of snap-in, etc.
08-10-2004, 03:03 PM
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its funny u say that because i changed all my plugs to the tr 55 plugs an it stumbaled pop farted backfired an such, tried checking everything, so i said frig it put my old plugs back in ran 100% again , dont ask my why but it did i checked everything like ten times, weird hu
