scoutman75 Posted February 28, 2011 Share Posted February 28, 2011 hey all ive got a good one for you 78 280z l28e automatic all stock has been parked for 6 yrs,drained the tank replaced all the filters and replaced plugs wires cap and rotor.started and ran fine i was using it for a daily driver for 3 months until it started this on cold start up will crank and not start when you check no spark no injector pulse ,i have already upgraded the ignition to a 280zx dissy for a good solid spark.i have checked and cleaned all the computer and ignition module connections,replaced the ignition switch and battery and put a different computer in the car.also installed a engine body computer ground kit heres the strange part to get it to start you can take a grounded test lite and touch the dist. wiring connector on the left fender you will here the injectors pulse and coil fire then it will run all day long restart every time untill it sets all nite before you start asking all the newbie questions about fuel fire and spark ,im a ase master tech w/20 yrs on the job and 10 yrs of owning 6 different z's but this one has me stumped all the people in our local z club have taken a stab at this one and all came up scratching their heads bobby burress okc president oklahoma z car club Quote Link to comment Share on other sites More sharing options...
NewZed Posted February 28, 2011 Share Posted February 28, 2011 (edited) Sounds like something electronic. Solid sate devices do strange things. Grounding the coil warms up the ignition module and the Pin 1 ECU circuit. Edited February 28, 2011 by NewZed Quote Link to comment Share on other sites More sharing options...
roger.svoboda Posted March 1, 2011 Share Posted March 1, 2011 your perception that the dizzy has anything to do with spark strength leads me to wonder about the rest of your post. Had you said coil and ignition module I would lend more credence to your statements. the fact that grounding something makes it work would lead me to believe you have the Lucas, Prince of Darkness disease. Lack of Earthings to use the Limey phrase. Quote Link to comment Share on other sites More sharing options...
scoutman75 Posted March 3, 2011 Author Share Posted March 3, 2011 (edited) your perception that the dizzy has anything to do with spark strength leads me to wonder about the rest of your post. Had you said coil and ignition module I would lend more credence to your statements. the fact that grounding something makes it work would lead me to believe you have the Lucas, Prince of Darkness disease. Lack of Earthings to use the Limey phrase. the 280zx dist. will supply a more stable and better controlled signal for your coil and increase coil saturation time,and if you read the post you would have also noticed i cleaned all grounds and added a complete grounding kit for the electrical system,including computer and ignition module Edited March 3, 2011 by scoutman75 Quote Link to comment Share on other sites More sharing options...
scoutman75 Posted March 3, 2011 Author Share Posted March 3, 2011 Sounds like something electronic. Solid sate devices do strange things. Grounding the coil warms up the ignition module and the Pin 1 ECU circuit. i was thinking along the same lines but already replaced the computer(i have 4 spares for this car)and the 78 ignition module is 375.00 to get another one so the 280 zx distibuter replaces the 78 module so thats all been bypassed , all the signals the computer look good on my labscope but being the 78 is different slightly from thh75-77 z's (and i dont have a manual for the 78 car) Quote Link to comment Share on other sites More sharing options...
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