Jon89le Posted January 8, 2004 Report Posted January 8, 2004 Well today i decided to do a little "tuneup". Ran GM Top Engine Cleaner, changed plugs and oil change. Well while doing my plugs, i realized that on the left coil pack, the wires were crossed! I had 1 going to the front and 4 going out back. Anyone want to share some light as to how the hell the motor ran so long like this with no problem? The plugs werent fouled up either. Thanks Quote
dkorinko Posted January 8, 2004 Report Posted January 8, 2004 Wow, that is pretty weird...is the car running any better now??? Notice anything different or is it running just the same??? Quote
Jon89le Posted January 8, 2004 Author Report Posted January 8, 2004 Seems to be running the same. The only difference was the idle which was noticed the night before when i decarbonized the motor. She idles at about 7-800rpms now without any roughness. I guess ill have to hit the track again and see how she goes...Im still baffled. Quote
Justin Posted January 8, 2004 Report Posted January 8, 2004 Pretty typical, you can do that to any of the coils. The plugs spark once per revolution, once at the top of compression, and once for exhaust, to burn any extra gases not used in the power stroke. So since your plugs spark twice as much, you can switch wires on a coil and it will show little difference. Quote
Jon89le Posted January 8, 2004 Author Report Posted January 8, 2004 Hmm...Interesting. So i guess the only real problem is if you cross wires from different coils? Quote
joey b Posted January 8, 2004 Report Posted January 8, 2004 true. It is also called the "waste-spark" system because each cylinder fires a wasted spark once on each revolution at the same time that the opposite cylinder is firing at the top of stroke. Quote
Slade901 Posted January 8, 2004 Report Posted January 8, 2004 From what I understand, the coils 1 & 4 are just one coil and splitted into two. When that coil fires, both 1 & 4 terminals on the coil pack gets the same spark at the same time. It is also the same for the other coil packs 6 & 3, 5 & 2. Quote
mfewtrail Posted January 9, 2004 Report Posted January 9, 2004 From what I understand, the coils 1 & 4 are just one coil and splitted into two. When that coil fires, both 1 & 4 terminals on the coil pack gets the same spark at the same time. It is also the same for the other coil packs 6 & 3, 5 & 2. Bingo 8) the coils provide power to the spark plugs in the cylinders that "rise and fall" with one another..ie: 1&4, 2&5, 3&6. Quote
joey b Posted January 9, 2004 Report Posted January 9, 2004 however, it is possible for only 1 cylinder to fire on a coil. Had it happen when my ICM failed. Quote
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