Brain box install battery wrong,not getting no pluse to injectors

The most common cause of computer failure (dude, it's not called a brain box) is not finding the root cause of an injector or ignition part failure, or repeated jump starts. A bad injector or ignition coil can destroy the transistors inside the computer.

Any codes?Battery, connection,starter,fuel a filter and pump.

brain box

no it could be the wrong brain box for that car. they are part number specific.

if u connected battery backwards u blew a couple of main fuses under ur hood figure out wich ones and replace them ull be fine3

duplicate question

Did you miss a connection in the harness ?
Unless the coils are disconnected the plugs should fire if the injectors have pulse.

It seems that if you tried that many brain boxes, one of them would have worked.

Here are some things to check. (I am assuming you have gas in the tank, the battery is good and the engine cranks over but doesn't catch and run.) Perhaps one of these items was overlooked in the trouble-shooting:
Engine cranks but won't start:
Charcoal canister full of fuel, faulty MAP or MAF sensor, faulty engine coolant temp sensor, faulty EVAP canister vent valve, EGR valve stuck open, lack of or incorrect fuel pressure (fuel filter, fuel pump, fuel pump relay), water in fuel, fouled spark plugs, faulty ignition module, severe vacuum leak, severely clogged fuel injectors, wrong size o-rings on fuel injectors (prevents compression), faulty airflow sensor (if equipped), Idle Air Control (IAC) valve defective, disconnected-broken-loose wires for all of the above.

how much fuel preasure ? this van needs 54 psi to start the lowest 45psi,make sure theres enough preasure. if timing is on and theres spark and you have preasure it should start unless!! there no injector pluse, check the injectors for power and pluse.if you spray throtlebody and it starts then we know it a fuel problem start there, let me what happens.

there is a fuse for the injectors check voltage at the injector it should read battery voltage.or your prom is bad in the computer.