BoostedCoop
Supporting VIP
- 5
- 5
- Aug 5, 2018
-
Walden,
New_York
Hello all, I have searched and searched every thread, and though several are similar they all seem to lead to dead ends. Here is what happened:
Car was running and driving fine, no noticable issues. I leave the car for about a month untouched, arrive back and the battery is dead. I hook it up to the charger, battery barely taking any power. I put it to the 200amp jump cycle and try to start the car, turns and turns for days, wont start. Few things I noticed, RPMs and boost gauge do not move when key is cycled and engine turned over, and possibly related, maybe not, sunroof stopped working. Check engine light does turn on. Car is a 95 GSX with a 6 bolt swap, 90 CAS. Car has never not started before.
Here is a list of what I have done in diagnosis so far:
Attempted to scan car, found scan tool did not connect, nor would link connect (and no green light on cable.
Checked power at pin 16 on OBD2 port, read 12v
Checked continuity at 4 and 5 on OBD2 port, both good.
Fuel pump kicks on (external pump setup with separate relay using MPI relay to trigger).
Checked for spark, confirmed spark.
Checked all wiring over leading to ECU and relays, as well as checked every fuse inside and out. Also confirmed all clean contacts, no corrosion.
MPI relay functions, confirmed voltage at both black/red wires, attempted grounding the blue wire (though as stated, fuel pump functioning), and traced back to ECU to confirm voltage.
I caved and sent my ECU in to ECMTuning to repair, they checked everything over and gave it a clean bill of health and sent back.
I checked all wiring over, no rodent damage and no issues found. All grounds intact, clean, and corrosion free. I had also added grounds prior to ensure no issues ever arose.
Here are "issues" I have found.
OBD2 pin 1 reads .2volts, reading in other threads it appears it should have 5 volts. I traced the wire to the pin on ECU and checked, same voltage there. Followed pin 56 and pin 62 from ECU through harness to large blue plug in center console, no issues there.
Injectors have 12v to them, cannot confirm pulse, and plugs dry.
Obviously primary issue being car wont start, assuming the lack of connection at diagnostic port and not running being related.
Does anyone have any direction to go? My vision is going from looking at wiring schematics for the last 10 hours straight, and my car is ripped apart and looks like a war has ripped through it.
Car was running and driving fine, no noticable issues. I leave the car for about a month untouched, arrive back and the battery is dead. I hook it up to the charger, battery barely taking any power. I put it to the 200amp jump cycle and try to start the car, turns and turns for days, wont start. Few things I noticed, RPMs and boost gauge do not move when key is cycled and engine turned over, and possibly related, maybe not, sunroof stopped working. Check engine light does turn on. Car is a 95 GSX with a 6 bolt swap, 90 CAS. Car has never not started before.
Here is a list of what I have done in diagnosis so far:
Attempted to scan car, found scan tool did not connect, nor would link connect (and no green light on cable.
Checked power at pin 16 on OBD2 port, read 12v
Checked continuity at 4 and 5 on OBD2 port, both good.
Fuel pump kicks on (external pump setup with separate relay using MPI relay to trigger).
Checked for spark, confirmed spark.
Checked all wiring over leading to ECU and relays, as well as checked every fuse inside and out. Also confirmed all clean contacts, no corrosion.
MPI relay functions, confirmed voltage at both black/red wires, attempted grounding the blue wire (though as stated, fuel pump functioning), and traced back to ECU to confirm voltage.
I caved and sent my ECU in to ECMTuning to repair, they checked everything over and gave it a clean bill of health and sent back.
I checked all wiring over, no rodent damage and no issues found. All grounds intact, clean, and corrosion free. I had also added grounds prior to ensure no issues ever arose.
Here are "issues" I have found.
OBD2 pin 1 reads .2volts, reading in other threads it appears it should have 5 volts. I traced the wire to the pin on ECU and checked, same voltage there. Followed pin 56 and pin 62 from ECU through harness to large blue plug in center console, no issues there.
Injectors have 12v to them, cannot confirm pulse, and plugs dry.
Obviously primary issue being car wont start, assuming the lack of connection at diagnostic port and not running being related.
Does anyone have any direction to go? My vision is going from looking at wiring schematics for the last 10 hours straight, and my car is ripped apart and looks like a war has ripped through it.
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