Ok guys, i got a 1993 redtop sr, swapped in a 1992 240sx. The thing was running great up untill a few weeks ago, i pulled into a gas station to fill up, shut the car off filled it with gas and went to start back up, cranked and cranked and nothing she wouldn't fire... At first i thought it was the fuel pump because i couldn't hear it turn on every time i turned the key to the on position. Luckily i had a new walbro 255 to throw in so after installing the fuel pump turned on the key and the pump still wouldn't turn on, so long story short I ran a positive wire from the battery, installed a switch in the dash to turn power on and off and put an inline 15A fuse, hooked it up to the fuel pump and used the existing ground wire. fianlly i hear the fuel pump turning on! so tried to fire her up, still nothing.
So then i began diagnosing other stuff. I wanted to see if the injectors where firring so i pulled the CAS and spun it with my hands, they are in fact firring, so i tested for spark no spark... so i get my test light out and i have constant positive power, but when i hook it up to the neg and the other end of the test light to the pos battery terminal the light will not turn on, so im thinking its my ground. So my question is, does the ground for the coil packs all hook up to the bolt on the back of the engine? because That bolt looks secure and i have not touched it so i cant see why all of a sudden it would stop providing a good ground...
at this point i am running out of ideas and I am really hoping this isn't an ecu problem...I need some new thoughts and ideas, i really just want to get this thing running again... pls help all info will be really appreciated. Thanks.
