I am spraying a ton of white smoke an have a miss also dumping gas like crazy.and just changed o2 sensors

What color smoke
Blue is oil, white is coolant, black is burning to much gas

If this is a gas engine, check for air leaks on the intake manifold and every vacuum line and switch you see. Use a pump spray water bottle and with the engine running, spray around seams and such.

A change in rpm or stalling will indicate the leak.

What is probably happening is the air leak is making the system run rich to balance the air/fuel ratio. This would make more fuel dump into the engine where it is not needed.

Another possibility is a loss of the signal from an O2 sensor. The O2 sensor sends a signal to the ECM to set the fuel demands and let the engine controls know that the fuel ratio is rich-normal-lean to adjust to optimum running condition.

Now if this is a Diesel, the hard to start condition would be due to an inoperative glowplug timer or worn glowplugs. If this is the mechanically injected model, the injector pump is timed to get the fuel into the cylinder either earlier or later to change the fuel ratio. Your diesel injector pump would need to be retimed. It will help across the board.

Please rate my info and let me know how you solved this.

White smoke is usually steam which would indicate a blown head gasket or crack in block. Hope it's something easier.

sounds like you have an air leak in the induction side some where. pressurising the inlet with a dedicated smoke machine would prove this, optionally with the engine running if you spray around the seams and joints of the inlet with penetrating oil you may get lucky and find it, you will know when as the engine tone changes when the oil fills the air leak momentarily.

Replace oxygen and exhaust sensor

This means its running rich, burnning to much gas. this could be due to a bad mass air flow sensor or bad o2 sensors or even a bad fuel pressure regulator, i would start with the fuel pressure regulator, remove the vacuum hose that goes to it and start the engine and see if gas is leaking from the port that vac hose goes to and if it is then replace that regulator and see how it runs from there. the rest you will need a scan tool to check the readings of the o2 sensors and mass air flow sensor. another thing is that if the engine is running rough it may be misfiring , skipping due to bad wires or sparkplugs. white smoke means alot of gas is being burnt and a regulator would be the first thing i would look at. good day.

I don't think it is your O2 sensor especially from the catylatic, because you mention smelling like gas and presence of gasoline. "Plugs" hopefully referal to the spark plugs, try to trace where you see gasoline and where it is coming strongest from. This is a case of leaked fuel line, fuel rails, fuel injectors.
1) Trace the source of where it is wet, there maybe a leak somewhere and you car is not getting the amount of fuel pressure to combust and thus make the engine dies. 2) Check your fuel injectors, fuel line rail, could be leaking or become loosen and is spraying gas when the fuel line is pressured into the spark plug socket. 3) You may have a dead spark plug one or more, and isn't combusting the gasoline, thus creating no compression leading to engine dying. 4) Leaking head gasket. Best is tracing where the gas is spewing from. That should help.

its the ecu ,my camry had the same problem. one of the injectors is staying open and flooding the cylinder.changerd the injectors same problem,changed the ecu problem solved.

One thing to check is the fuel pressure regulator.
If the diaphram is leaking it will cause gas to be pulled into the vacuum system causing lots of white smoke and extreme rough running.

injectors ,when dirty, tend not to spray as well,so it might be that......try some fuel injector cleaner. Also if you have a bad o2 sensor .The o2 sensor tells the computer how to mix the air and gas mixture