Take away its cigarettes
Cracked intake manifold...
Most likely a cracked intake manifold.
exercise and no smoking
Not Smoking.
It has been my experience that most backfiring problems are cause by intake vacuum leaks. You might want to check the torque on the intake manifold retaining bolts or it may be a worn intake manifold gasket. You might also want to inspect the vacuum hoses for cracks or loose connections. You might also check the timing. If the timing is off, it can also cause backfire and starting problems.
He smokes in the manga but he only started smoking after the death of Asuma and keeps on smoking till he kills Hidan in the Nara forest. after that he stops smoking.
If you put fuel into the intake and it starts and keeps running, replace the engine coolant sensor. If you put fuel into the intake and it starts but stalls it probably is a bad fuel pump or pressure regulator. Do a fuel pressure test. Need to know what model, year and engine you have to help you any more.
This can occur when there is an excessive passage of air into the combustion chamber or malfunction of the inlet manifold sensor, air intake themistore and iddle stepper motor.
what year and what engine??
Take a look at the oil dipstick, is it milky? Is there white smoke coming out the tail pipe? May be leaking internally. If your beretta has a v-6 odds are that your intake manifold gaskets are leaking these gaskets are plastic and must be replaced periodically your antifreeze is most likely leaking there and burning off immediately thus you'll see no leak.I recommend youy take the car to a shop for diagnosis...
Because a true 350 vortec I think relies on the vortec intake in order for the pressure to stay correct. I just remember i had my vortec box off of my truck one time I started it and It died just put the old vortec air intake back on and it should be fine. sounds like you have vacumn leaks around the intake manifold, this can be checked with a can of carb spray,
The engine temperature sensor has failed. It is under the intake manifold. 20 dollar part, approx. 100 dollar labor. It sure will make it run better!