1997 pontiac sunfire 2.2litre appears number two and four cylinders are dead but all have spark. after running engine for a bit plugs on those dead cylinders are blackish but dry car runs some what better at higher idle

You should replace your Cap and rotor....Check for any vacuum leaks, When you replaced your plugs, were there any plugs contaminated with engine oil ? Some times manifold gasket goes bad...and causes vacuum leak...Hope this helps you alittle more ???

Sounds like you have a bad cylinder...
This could be due to a number of reasons...
No spark at one cylinder, due to a bad spark plug, coil, or wire.
No fuel due to a bad injector
Bad cylinder with low or no compression

TRY CLEANING the post on your distributor (inside and out), and try replacing the plug wire. Sounds like your just not getting juice to that spark plug. Worst case, new distributor cap.

refill the oil and see if you can get the engine to turn. Try turning the crankshaft pulley with a socket. If the engine will not turn, it will have to be rebuilt. If you can get it started, locate the oil leak and get back to us. Even if it will start, it may need to be rebuilt--we'll have to see how it runs. :-(

With the hood open, there is 4 spark plugs and their location is in the front side of the engine. Each plug has a spark plug wire attached to it. The spark plug wires run from the right side of the engine from the coils to the spark plugs.
Caution, make sure you clean around each plug before removing them so you don't get debris in the cylinders.

If you have the DOHC 4 cylinder engine, the long ribbed center section on top of the engine contains the ignition module and coils. Release the 4? bolts and lift the assembly up to expose the spark plugs

sounds like a bad injector, just connection at the injector, also check for leaks at intake, one more thing , do a compression test on that cylinder start there, good luck.

check for power coming from coil packs to wires, could be bad wires, coil packs, ignition module(under coilpacks). check all fuses as well

let me guess the two center cylinders are out?

if so there's a bad head gasket

let me know

300 is cylinder missfire check the ignition coil but the basic is high tension wire and spark plug hope it FIXYA our problem thanks pierre