1993 nissan maxima 3.OL 2 day ago there was spark when cranking but today there is no spark when cranking i check for spark at the coil and spark plug wire no spark what all i need to check to fix the problem?
If your doing a lot of cranking and testing, You need to hook up battery charger or use jumper cables to see if spark comes back. Make sure the battery has a full charge and connections all good. Even if battery is only down a couple of tenths, it might make a difference. 12.6 volts is the generic spec for a full charge. I have seen starter motor taking all the voltage, not much if anything left for ignition system. Could be other issues?
i'm not doing a lots of cranking i just went out to the car today and crank the engine it wouldn't start no spark it was starting 2 day ago.
Check for applicable trouble codes? My wiring info for your model year isn't very good. I'd want to check ignition system, but, can't see anything from here.
the scan tool i have it just Check for applicable trouble codes from 1996 and newer vehicles, where is the diagnostic connector located on the 1993 nissan maxima? i don't see it under the left driver's side of the instrument panel.
You get at the ecu/electronic control unit, under center of dash, then follow instructions in picture, look for flashing lite, count the flashes, looking for two digit codes. 
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Does the tachometer register while cranking the engine ?
SOURCE: 2001 hyundai santa fe 6
HI......
OK. just follow the number on the ignition coils.
And the number on the cylinders are.
The FIREWALL side are 1,3,5, Starting from the belts location.
The RADIATOR side are 2,4,6, Starting from the belts location.
The coil with number 1 go to cylinder 1. as the same way the rest of the coils and cylinders.
OK... I hope this solve your question .
THank you for use fixya.
SOURCE: help spark plug wire 95 sunfire 2.2
so did u change the wires or not? - if not thats what yu need to do...esp the main coil wire. Also did u change the rotor button and distributor cap ? if not do those too.
SOURCE: i got 1995 nissan maxima
The knock sensor error could be the sensor, sensor circuit, or some misfire caused by a dirty/bad injector or some ignition problem.
One issue that might tie it all together is coolant leak causing the misfire/knock like a head gasket, but I think you would be throwing more codes or you would see more problems than what you have.
SOURCE: order to put wires on nissan maxima
For the 1993 Nissan Maxixa 3.0L:
Firing Order:
1-2-3-4-5-6
Cylinders:
......(back)
1.......3........5
2.......4........6
......(front)
Distributor Connections:
...(back)
............1
......6
5.................2
............3
......4
..(front)
SOURCE: 2003 ford Taurus DHOC 3.0
Hi.
The PCM is located in the rear right corner of the engine compartment, sticking to the firewall:
The PCM can be replaced with a new or used god-working one. In both cases the PCM must be reprogrammed using a Tech 2 tool that costs about $3000. The operation is done at the garage.
The PCM is unlikely causing misfire on a single cylinder. Check wires going to spark plugs. If the coil is getting no 12V on the ignition side check ignition. It is strange that one coil has no power, the engine usually does not start when that happens because the same coil gives power to spark plugs on different cylinders.
Check if there is a capacitor fixed to the head aside the coil (there should be one). It should be cylindrical and one inch long, held by a single screw and located aside the coil. If there is a capacitor, that must be replaced with the coil. If you have not replaced the capacitor that is probably involved in the problem.
If you have already replaced crankshaft position sensor, check crankshaft position sensor harness in PCM. I uploaded here the bulletin with CKPS to PCM testing:2003 Taurus CKPK PCM testing.
Test the PCM and CKPS connectors. Check again voltage to coils and spark plug cables. I understood that spark plug cable nr.3 has no spark from coil. Check DC in from ignition to coil.
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