Okay, I know these are cheap-o plugs, but they were unopened in the trunk (605'*) and I checked and these will go in 96 3800 II. Still had the original AC Delco plugs (133K miles) so I had half an hour last night to make a quick change. I swapped the plugs to see if I could notice a difference.

Don't like what I feel. Plus the check engine light came on!!!

Are these plugs that bad? Or could it be I didn't fasten the spark plug wires back on good enough (or maybe there'* a trick to it I don't know about)? Also, I didn't use any of that lubricant for the wires, but I don't think that would cause this. Sooo, I'm going to swap em back out tonight, but buy some AC Delco Platinums.

Here'* the thing that'* bothering me (the funny part). While I was inside, my son started the car when plug #6 was out. Says he wanted to see if it made any difference/what it would sound like missing a plug. I think it was for only a second or two....I think the only damage was maybe some gas shot out where the plug was......but I'm also thinking this may have been what triggered the Check Engine Light. Thoughts? Deathrat? Wren?

Also...what should I do to my son?

I don't know much about if the plugs are bad or not ( unless it has burnt residue or isn't gapped properly ). If in doubt, change them... there is a lot of things you can cut corners and get al cheapo stuff, but anything for the heart of the car engine/tranny shouldn't be chincy with. As for your son... I think he should spend the whole day cleaning and waxing your car ( full detail job.. bring out the white gloves )

The check ingine light is because the computer detected a 'misfire' in cylinder 6... No big deal.

Plugs are cheap. If you have any questions about whether or not you should change them, go ahead and do it. But I'd go ahead and make sure there were fresh wires on as well.

Still had the original AC Delco plugs (133K miles)

I was told the AC Delco platinums are the best you can buy besides the iridium plugs.

Yeah the AC Delco'* are really good . I know they outperform everything but the Iridium'*

First off think about this: Autolite plugs are the one & same as Ford Motorcraft plugs! Now, AC Delco platinums are designed to last 120,000 km or 5 years!

Hey guys, I went ahead and swapped them out for AC Delco Platinums. Ran a check on the Check Engine Light. 306-Misfire on the 6th cylinder....you were right! Hey.....is there a way I can reset the Check Engine Light sensor? Or do I have to take it in and have a skilled professional do it?

Disconnect your battery for about 10 minutes or so. Then reprogram all the stereo presets!

That should do it. (reprogramming the stereo presets does not affect the check engine light.....just a side effect!!!! that was funny)

heh...thanks wren!