Why is my car dont start some time

How old is car but if I had to just guess I’d say master cylinder. But many things can affect the brake bleeding one of the largest issues is the car being level and not on a hill or only having one wheel jacked up at a time. But if you know the master is good (replaced already) then the only thing to do is start with a full brake resivour the start the bleeding process by gravity bleeding first which is simply opening the bleeder screws one at a time starting with the passenger rear wheel pump brakes six times on the sixth pump hold down have someone else open the bleeder screw on the passenger rear wheel first continue four to five times then move to drivers rear wheel pump and hold brakes open bleeder (pedal will drop) hold until bleeder is closed then pump again and repeat four to five times then move to passenger front continue to drivers front last always making sure brake. Resivour never gets low if it does start process over.

Often just open the bleeder valve and let gravity do the work for you. Make sure the brake fluid is topped off. Work from the farthest brake cylinder to the closest cylinder to the brake reservoir.

This may have altered the programming of the alarm or ignition cutout. Your car may have a body control module which may have been altered. It may be more helpful if you specify more details including what model car you have and if it has an alarm or engine immobiliser.

tune it up, (repeat) if never tune its TOW TIME. sorry. every 60,000 miles is mandatory on call cars.
start it with 10% throttle (rigth foot)
if that dont help, try staring wide open throttle (super secret unflood mode)
called pedal to the metal, by truckers,

good luck getting home.
check for spark
try test fuel
id sell any Isuzu here state side, they are like Yugos now.
or suzuk'is. (gone)

If you get it started and shut it off will it fire right back up, but you let it set for a extended period of time it has to crank for a while?. Sounds like you have bad fuel pump if so, it's allowing fuel to bleed all the way back into the tank, so when you first try to start it has to fill all those lines back up...

Try turning the ignition on (not to turn the engine over but only on) for 5 seconds and then off then repeat that three or four times then try and start it. If it starts up immediately after that then you have a fuel pressure problem and by doing this you are priming up the high pressure fuel rail. possible causes are a fuel filter blockage, if you dont know the history of the fuel filter then replace it, or could be a pump issue or a pressure regulator on the rail issue.

turn the key as far as you can without starting it press the gas pedal 3 times all the way to the floor and shut the key off you have to do it all in a 5 second window so you might have to try a few times befor you get it if you dont turn the key off quick enough it wont work

The automatic air bag sensor is tested EVERYTIME to start the car/van. Your system has detected a failure in the Air Bag deployment sensor. It is not dangerous... but the air bag with the faulty sensor will not deploy in an accident.

You have two minutes to match the first tire/wheel position, and five minutes overall to match all four tire/wheel positions. If it takes longer than two minutes, to match the first tire and wheel, or more than five minutes to match all four tire and wheel positions the matching process stops and you need to start over.
The TPMS sensor matching process is outlined below:

1. Set the parking brake.
2. Turn the ignition switch to ON/RUN with the engine off.
3. Press the Remote Keyless Entry (RKE) transmitter's lock and unlock buttons at the same time for approximately five seconds. The horn sounds twice to signal the receiver is in relearn mode and TIRE LEARNING ACTIVE message displays on the DIC screen.
4. Start with the driver side front tire.
5. Remove the valve cap from the valve cap stem. Activate the TPMS sensor by increasing or decreasing the tire's air pressure for five seconds, or until a horn chirp sounds. The horn chirp, which may take up to 30 seconds to sound, confirms that the sensor identification code has been matched to this tire and wheel position.
6. Proceed to the passenger side front tire, and repeat the procedure in Step 5.
7. Proceed to the passenger side rear tire, and repeat the procedure in Step 5.
8. Proceed to the driver side rear tire, and repeat the procedure in Step 5. The horn sounds two times to indicate the sensor identification code has been matched to the driver side rear tire, and the TPMS sensor matching process is no longer active. The TIRE LEARNING ACTIVE message on the DIC display screen goes off.
9. Turn the ignition switch to LOCK/OFF.
10. Set all four tires to the recommended air pressure level as indicated on the Tire and Loading Information label.
11. Put the valve caps back on the valve stems.

does the air bag light prove out when the key is turned on?