KA-T No start (Spark and Fuel) - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ceezer · 01-26-2013, 05:24 PM

I will attempt to be as descriptive as possible. 1992 KA24deT, some 200k on chassis, about 180k on 1991 swapped dual cam.

Short version: Fuel pump not priming, no spark at all.
Have tested: ECU, Relays and fuses, Coil, power transistor, CAS, Dizzy,

Longer version:
Went ahead and installed a turbo kit (t25 bottom mount with ecu for 370cc injectors, n60 mafs), adjustable SARD fuel pressure regulator, and gauges (boost, aftermarket tach, oil pressure, and oil temp). After completing the job, the car started and was allowed to run for about 30 minutes while burping radiator and checking for any leaks. Shut the car to fix the tachometer and when we went to start it, it cranked but didn't turn over. The fuel pump (walboro 255lph) would not prime and it was later on that we also found it to not be sparking. To temporarily get the car going, we ran new wire running from the battery to a switch to the fuel pump. At this time, the fuel pump primed, stayed on, and showed the correct fuel level.
Next, to diagnose the no spark, we pulled out the entire ignition coil and chip, with bracket and all, and placed it into a working 240sx and sure it fired up just fine. To test the CAS and dizzy, we took it out and put it in the known working 240 once again and it fired up. Using a test light, we tested all power transistor wires and discovered that the white wire (coming from ecu pin #1) was not lighting up when connected to the test light. It did, however, have continuity.
Onward in our investigations, we swapped out the ecu for the stock one (again only temporarily) but still no spark. We have swapped all fuses and relays from the donor 240 but nothing.

Help is needed. Please and thank you all.

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01-26-2013, 05:24 PM	#1
ceezer Join Date: Dec 2012 Location: San Jose Age: 32 Posts: 10 Trader Rating: (0) Feedback Score: 0 reviews	KA-T No start (Spark and Fuel) I will attempt to be as descriptive as possible. 1992 KA24deT, some 200k on chassis, about 180k on 1991 swapped dual cam. Short version: Fuel pump not priming, no spark at all. Have tested: ECU, Relays and fuses, Coil, power transistor, CAS, Dizzy, Longer version: Went ahead and installed a turbo kit (t25 bottom mount with ecu for 370cc injectors, n60 mafs), adjustable SARD fuel pressure regulator, and gauges (boost, aftermarket tach, oil pressure, and oil temp). After completing the job, the car started and was allowed to run for about 30 minutes while burping radiator and checking for any leaks. Shut the car to fix the tachometer and when we went to start it, it cranked but didn't turn over. The fuel pump (walboro 255lph) would not prime and it was later on that we also found it to not be sparking. To temporarily get the car going, we ran new wire running from the battery to a switch to the fuel pump. At this time, the fuel pump primed, stayed on, and showed the correct fuel level. Next, to diagnose the no spark, we pulled out the entire ignition coil and chip, with bracket and all, and placed it into a working 240sx and sure it fired up just fine. To test the CAS and dizzy, we took it out and put it in the known working 240 once again and it fired up. Using a test light, we tested all power transistor wires and discovered that the white wire (coming from ecu pin #1) was not lighting up when connected to the test light. It did, however, have continuity. Onward in our investigations, we swapped out the ecu for the stock one (again only temporarily) but still no spark. We have swapped all fuses and relays from the donor 240 but nothing. Help is needed. Please and thank you all.