Ignition Problem

1996 INFINITI G20
150,000 MILES • 2.0L • 4 CYL • FWD • AUTOMATIC
Avatar
ANDREW THOMAS2
  • MEMBER
  • 12 POSTS
Touched the capacitor and it crumbled. So was looking up part number T50276. It is 0.5 uF from Mitsubishi. Cannot find it anywhere. Now is it electrolytic or Non electrolytic. Most under 1 uF is Non. Is this protecting from surges? Car will start sometimes but rare and when it does it does not want to idle, it is like I am intermittently depressing accelerator. seems like it is robbing power from other components too. And with it not in will I burn up other things on the run circuit?
Jun 14, 2016 at 12:37 PM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
Can you send a picture of what you are talking about please?
Jun 16, 2016 at 8:06 AM
Avatar
ANDREW THOMAS2
  • MEMBER
  • 12 POSTS
Is this stopping spikes of current from the secondary? And isn't their supposed to be a diode inside the relay for it?
Images (Click to enlarge)
Attached Media
Attached Media
Jun 16, 2016 at 10:36 AM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
That looks like a noise suppressor for the radio and has noting to do with the way the engine runs. Does the engine have low power misfire? what is it doing
Jun 16, 2016 at 11:16 AM
Avatar
ANDREW THOMAS2
  • MEMBER
  • 12 POSTS
I soldered the wire back in to the cap and it will start fine. Idle fine. But I do have about .6 volt drop in the ignition circuit. And when I jump the inhibitor relay ..battery straight to start. It will run but also coolant sensor had about.298 and tps .650. Ect power comes from ecu and tps from tcu. But both on same ground.
Jun 16, 2016 at 11:28 AM
Avatar
ANDREW THOMAS2
  • MEMBER
  • 12 POSTS
No misfire but on bumpy roads before I found bad capacitor it would stall out driving.
Jun 16, 2016 at 11:32 AM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
Disconnect the ignition coil and rerun the tests you could have a shorted coil. It could be the computer has gone bad as well
Jun 16, 2016 at 11:32 AM
Avatar
ANDREW THOMAS2
  • MEMBER
  • 12 POSTS
Coil secondary 15k a little low. All sensors spec. No fries in ecu or tcu. But I already tried unplug coil. Still same
Jun 16, 2016 at 11:40 AM
Avatar
ANDREW THOMAS2
  • MEMBER
  • 12 POSTS
Ahh there was a wire soldered to back of radio battery power wire to run extra amp. Looks like it shorted to ground because it's bare. And shorted o2 rear
Jun 16, 2016 at 11:47 AM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
Did you fix the wire and is the o2 sensor okay now?
Jun 17, 2016 at 8:28 AM
Avatar
ANDREW THOMAS2
  • MEMBER
  • 12 POSTS
Fix the wire and heat shrink. O2 bad. Still low power to sensors and half a volt drop to acc and run.
Jun 17, 2016 at 9:09 AM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
Thanks for getting back to me, it seems like a power transistor is shorted out, here is a wiring diagram that shows the o2 sensors wiring.

Let me know what you find.

Best, Ken

Image (Click to enlarge)
Attached Media
Jun 17, 2016 at 9:21 AM
Avatar
ANDREW THOMAS2
  • MEMBER
  • 12 POSTS
Cannot read codes or use consult., but mil lamp says 13 ect temp.. 84 trans diag comm line. 10 5 egrc.. 43 tps.. 126 tps... 28 overheat..
Jun 17, 2016 at 9:25 AM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
Lets disconnect the battery to clear codes, if that doesn't work it sounds like the computer is bad.

Best, Ken
Jun 17, 2016 at 9:30 AM
Avatar
ANDREW THOMAS2
  • MEMBER
  • 12 POSTS
Consult will not power. Will not start with inhibitor switch in. But if I jump inhibitor relay it will start.
Jun 17, 2016 at 11:50 AM
Avatar
ANDREW THOMAS2
  • MEMBER
  • 12 POSTS
Power transistor spec and air regulator good too. Where else does the white green ignition wire go your diagram is alot better. Maybe that is why the inhibitor switch has to be jumped.
Jun 17, 2016 at 12:01 PM
Avatar
ANDREW THOMAS2
  • MEMBER
  • 12 POSTS
Theft warning relay 2 .. E56 pin 1 has 12 volts pin 3 does not. So replaced splice was 12 until I tried to start then went dead again
Jun 17, 2016 at 12:10 PM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
Hey ANDREW,

Sorry for the delayed response this question must have slipped through the cracks. Did you ever get the problem fixed?

Best, Ken
Dec 21, 2016 at 11:43 AM
Avatar
CSMOHT
  • MEMBER
  • 1 POST
It's called an external ignition coil good luck trying to find them you got to buy the whole distributor to get it and that's the reason why his car is not starting just dealt with the same thing
Sep 12, 2019 at 2:14 PM