Cylinder 6 misfire for 2000 cadillac deville 4.6 liter engine

I don't think you really understand what this fault code means, it means that likely all the engine cylinders are misfiring at random no set pattern, not any particular cylinder. I would start with checking for engine vacuum leaks like the intake manifold gasket. that is all I can say since you provided no make, model or year and engine type and size information.

swap the coil pack from the other side of the engine and see if your misfire moves to cylinder 1

MMY 2003 DTS HAD SAME PROBLEM. REPLACED FRONT COIL PACK AND FIXED THE PROBLEM. LATER #3 CYLINDER STARTED MISSING, REPLACED REAR COIL PACK AND SOLVED PROBLEM HOPE THE HELPS

Usually, if you only have 1 cylinder misfiring, you have either a bad spark plug or bad spark plug wire. If you replace the cylinder 6 spark plug and still have a misfire condition, replace your spark plug wires. If replacing the plug and wires doesn't fix the problem, replace the ignition coil.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

coil pack is bad about 200 to 300 easy to fix just by the one for the front of the engine(closest to the front of the vehicle)

2000 Chevrolet Lumina 3.1 liter V-6 VIN "J"




Hope helps.

DO SPARK PLUGS AND WIRES CHANGE IF NOT HAVE DONE TUNE UP IN A LONG WHILE. CLEAN FUEL INJECTORS.CLOGGED FUEL INJECTORS WILL CAUSE CYLINDER MISFIRE ALSO.

Possibly a bad plug. Check the compression on cylinder 5.

Check to see if the two cylinders misfiring are on the same coil pack. If so, change the coil pack in question.

This happened to me on 1997 Cadillac Deville Limousine.

Also, check for a blown head gasket with compression test.

Here is a diagram of the firing order for you 3800 engine. Cylinders 1 and 4 are misfiring because the operate under the same "Coil Pack" and the coil pack has unfortunately gone bad. O'Reilly sells them for between $30-50 depending on the amount of warranty coverage you want. To replace, simply unscrew the screws that hold the coil pack in place. WAIT before unplugging the plug wires. Place the old coil pack and new coil pack next to each other, unplug one plug wire, then plug it to that same port on the new coil pack. then do the same for the other plug wire. Then screw your new coil pack in place, and start you car. should run fine!