Nissan Repair: 240sx no spark?, fuse blocks, smell of gas

Question
QUESTION: Was working on an a/c problem while car was running unplugged the a/c drier a couple times and the car shut off as I was pushing the plug in. Don't know if this had anything to do with this but now I do not have any spark. turns over just not cranking. is there a way to check ecm and where is it located? right front kickpanel? any ideas greatly appreciated.

ANSWER: Nathan,

Unplug the pressure switch at the dryer again to see if the compressor is dragging the car down and not letting it run.  That would be my first guess.  ECM is under the passenger seat or the passenger kick panel.  I do not know what year your car is so it makes it difficult.  I would also check the master fuses and fuse links at the positive post of the battery and the fuse blocks under the hood to make sure a circuit was not overloaded.  Email me back and let me know the year and what you have found and we'll go from there.

---------- FOLLOW-UP ----------

QUESTION: OK 1997 240sx automatic. checked all fuses under hood and inside. car was running while working on ac and it shut off while running like it stalled. first was fuse check then we moved to checking for spark and found none. got a code p1320 I believe, which is supposed to be ignition. car is turning over and pumping gas for we can hear fuel pump and faint smell of gas while trying to crank. 2 people have suggested ecm but I don't know how to test. through some reasearch have found out there is a light on the ecm that indicates power @ the ecm and if no power to the light to try the ecm relay mounted in front of the ecm. does this sound correct. hopes this helps you help me. thanks for the quick response and looking forward to hearing from you again.

Answer
Nathan,

Did you check the wires at the positive battery cable?  There is a little assembly of fuse links and some have small fuses there.  Anyway, if you have checked that and you have no spark then you are going to have to backtrack from the coil to see where the power is failing.  Remember that there is a start and run mode on the ignition.  The first being 12 volts to the coil and the second is close to 9 volts.  Get a test light or a multi-meter and check to see what the coil is getting in respect to voltage.  Email me back with what you find.