If you have a misfire on all 4 cylinders you have your choice of replacing them all and hoping that is the problem OR finding a local s2k owner willing to swap coil packs for a day to see if the misfire clears up. If you can't find someone to trade coil packs with, then you have an expensive gamble...either the coil packs or the injectors are bad and there really isn't a good way to tell unless you replace one or the other. Ignition Coil packs run about $90 each. Some part of the engine, it probably overheated and you just need to replace the cylinder heads or if lucky the little rubber seals that most likely melted.
sounds like someone is ready for that $600 tuneup
Possibly one of the cylinders is misfiring. Try a tune-up and/or check the cylinder compression of all 4 cylinders.
Cylinder 1 is misfiring. 300 indicates a problem with all cylinders and 301 or 302 would indicate a problem with cylinders 1 or 2 respectively
It means the #4 cylinder is misfiring. Can be bad plug, plug wire, burnt valve or blown head gasket. Replace all the plugs and wires and see if the misfire goes away. If not, run a compression test on all cylinders.
SOunds like it is misfiring and not burning all of it. First check ignition, fuel pressure, if ok, check compression all cylinders.
2.2 or 3.5 engine info needed along with codes and which 2 cylinders are misfiring.
Engine cylinders # 1 and # 4 are misfiring
P0300 - Random Misfire . P0300 indicates multiple cylinders are misfiring or the PCM cannot identify which cylinder is misfiring .
It probably overheated due to misfiring or poor condition of engine tune. This overheating causes the internal core of the converter to break up and rattle. Replace the converter but make sure the engine is tuned up properly and firing on all cylinders.
1: Replace the injector. 2: If still misfiring, replace the engine.
Cylinder #4 is misfiring in an engine with 4 or more cylinders. Engines have a firing order that is used to number the cylinders and it depends upon the engine which one is #4.
I really hate to be the one to tell you the bad news but it is possible that you have bent some valves. Take the spark plugs out of the missing cylinders and run a compression check on those two.