I had the same problem in my 99 firebird....check the engine module or it could be the coils mine was both along with a faulty catalytic converter..if you smell a rotten egg then its the cat... goodluck
Check the current at the fuel pump; fuel pump might be going.
TRY THE O2 SENSORS HAPPIN TO MY 1996 IMPALA TO BUT THE WIRES WERE CROSSED ON MINE
P0300 Diagnostic Code - Random Misfire
Engine may stumble or miss
Engine may be hard to start
you may notice no issues
Failing spark plugs or spark plug wires
Bad coil or coil pack
Failing oxygen sensor(s)
Bad fuel injector or more than one
Stuck exhaust valve
Bad catalytic converter
EGR valve or valve passage clogging
Bad camshaft position sensor
Bad PCM or ECM
Best first action is a tune up, new plugs, wires, inspect all hoses and wire connections then reset the code. If it returns you will need to narrow it down to a system, coils and coil packs should be tested, catalytic converters for function ( do you smell rotten eggs?). A misfire that jumps cylinders could indicate a lean condition, do you have any other codes along with the 300? this will help clue you in to the source, check valve function to make sure they are opening and closing fully.
This is probably pone of the most difficult codes to troubleshoot, so start with the basics and work your way into the more expensive options, in many cases a good old tune up solves the problem, back it up with a fuel system cleaning and see where you stand.
Doubtful. Bad spark plugs would give you a rough idle, hesitation and poor performance. And they may also give you a P0300 code for random misfire.
Code P0300, Intermittent rough idle,
yes it can
Well...the misfire on 1 and 3 would explain the rough idle. The misfire could be from worn plugs, wires, bad coil, or bad injectors.
If it is slipping in gear or any out of the ordinary rough shifting.
Old spark plugs can make a car misfire, run rough, and not fire at all.
Misfire? Due for a tune up? Check engine light on?
Check idle adjustment (rpm) then check timing, then check for misfire-start there.
Check the Park Avenue EGR valve for a clog. A clogged valve can cause a rough idle and stall at a light.
Run a compression test.
Check engine light is on with a misfire code, rough idle, lack of power, low compression.
you have a cylinder misfire