Question about 1992 Nissan 240SX Fastback

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240sx my car will crank but will not start... i can hear the fan come on the fuel pump and the starter spins... i do not have the knowledge of the trouble codes for the ecu.... we did the diagnostic thing on the back of the ecu and it does all the blinking but i have no idea what to do next

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  • skullzzz Aug 12, 2008

    hi yesterday i have change my engine. the strarter spin, i have some gas and the spark plug do her job.but the engine dosen t start. im really confused about this please help me.

  • randygalati Mar 19, 2009

    i have an ignition problem i tried the spark test on all plugs and even checked the coil that goes to the distributor and its live with 12 volts and still no spark is it the ecu?? cause i dnt want to mess with that thing..

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Hi 240 SX Girl-

We'll start with the basics, okay? An engine requires three things in order to start and run:

  1. Compression;
  2. Spark (Ignition delivered at the proper timing); and
  3. Fuel / Air Mixture
We'll assume that your engine has compression and narrow it down to either a fuel or an ignition problem.

The most likely culprit is a fuel delivery problem, usually a bad fuel pump, or a fault in the fuel pump control circuitry. Check the fuel pump fuse, locate the fuel pump relay and swap it with one of the other relays that is of the same type (like a fan relay). If this does not get you anywhere, disconnect the air ducting to the throttle body (where the throttle cable from the accelerator pedal connects) and squirt some starter fluid directly into the throttle body throat while a helper tries to crank the engine... If it tries to start and run, you now know it is definitely a fuel delivery problem, and you can narrow it down from there, but at this point I would say it is a bad fuel pump.

If it STILL does not try to start, you might not be getting ignition to the spark plugs. You can check this by removing one of the plug wires, inserting an insulated screwdriver into the plug connector, and holding the metal shaft of the driver very close to engine metal (ground), while someone turns the engine over. There should be a spark from the screwdriver shaft to the engine if ignition is present. BUT BE CAREFUL!!! THE SPARK PULSE IS VERY HIGH VOLTAGE AND COULD GIVE YOU A GOOD JOLT IF YOU TOUCH THE METAL SHAFT WHILE DOING THIS!!!

If there is no spark present, it could be any number of things in the ignition system causing this, and post a comment stating you need further help and I'll walk you through ignition diagnosis.

But try the above first --- I'm pretty sure this will get you going again, and if it does, please remember to rate my advice --- your approval is my ONLY compensation for providing this advice!

Thanks,
WildBill

Posted on Jul 14, 2008

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We tried all the above and still won't start. We have good fuel great spark.

Posted on Nov 16, 2008

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