Nissan Repair: No Fire To Plugs, leaky injector, nissan dealer

Question
1996 Infiniti I30 (same as Maxima) 3.0 V6   Plugs don't fire.
120,000 miles

Work is being done by by mechanic of 45 years.
Things that have been done.

Replaced cam posistion sensor
Replaced the 2 crankshaft sensors
Tried a different computer

Tested injectors and they are squirting gas
Tested coil packs. Getting proper voltage, but not pulsing a spark to fire the plugs

At one point, put back original computer, hooked everything back up and tried to fire it up.  Got spark for about 3 minutes but would not fire up because plugs were too wet.  No more spark pulse now.

Local Nissan dealer has been working with my mechanic and at this point they don't know what else it could be.

Any further ideas would be a help.  Thanks

Answer
Paul,

Check to see if there is spark.

No spark then check the output from ECM.

If there is spark check fuel pressure.

A leaky injector or two can kill the process.

If there is fuel pressure and it is below normal that would indicate leaky injectors or a bad fuel pressure relay or a bad pump.

This is a process of elimination and you have to divide sysems to get to the root of the problem.

Are there any codes?  Email me back as I would like to help in the correction of the problem.