Well unfortunately the harness didnt fix my Issue, the new plug was installed by Carl H but the car is still only firing on the front 3.
Ive tested and Ohm checked every wire and everything checks out, but the minute I fire the car up the back 3 are dead.
The car has perfect idle, but make zero power.
Im pretty much at a loss right now and If I cant figure it out soon Im probably going to pull the motor, call my losses and go to a different motor.
I was really hoping this harness deal was the issue but looks like just more wasted time and my car still isnt running right.
Rb20det running on front 3 cylinders (no spark on rear 3)
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thes13project
- Posts: 38
- Joined: Mon Apr 20, 2009 6:14 pm
- Car: 1993 240sx Coupe s13.4 RB20, 1993 240sx Vert
- Contact:
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Yellow4g63
- Posts: 3718
- Joined: Mon Jan 20, 2003 6:07 pm
- Car: 95 Nissan RB20 240SX RB20
91 Nissan NX2000 VE power
95 Nissan 240SX Stock - Contact:
Re: (thes13project)
did u try to swap around the coils? or continuity test each pin to the ignitor?
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USMCgetsome
- Posts: 2030
- Joined: Wed Apr 14, 2004 7:38 pm
- Car: OWN S13.5 RB25DET/2003 G35
- Contact:
Re: (Yellow4g63)
hey buddy you need to check that coil pack harness. Its seperate from the main harness and has 2 ground wires(black) into 1 terminal lug. Also have you check the coil packs to the valve cover to see if they are firing? also, how did you confirm the last 3 aren't firing?
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RustspecS13
- Posts: 928
- Joined: Sat Sep 08, 2007 5:30 pm
- Car: '74 260z and '88 300zx turbo
Re: (USMCgetsome)
If it idles perfect how can it possibly have 3 bad/non functioning cylinders?
My SOHC KA will drop a few cylinders off idle and yet idle perfectly. I replaced my cap/rotor/wires/plugs and it went away for about 1K miles. I also still have the walboro and stock FPR so im sure its running rich at part throttle.
Sounds like your coils are weak, your plugs are gapped too wide or the eletrical grounds are crap. Can you measure the voltage at the 3 pin connector that supplies the coil pack power?
~Alex
My SOHC KA will drop a few cylinders off idle and yet idle perfectly. I replaced my cap/rotor/wires/plugs and it went away for about 1K miles. I also still have the walboro and stock FPR so im sure its running rich at part throttle.
Sounds like your coils are weak, your plugs are gapped too wide or the eletrical grounds are crap. Can you measure the voltage at the 3 pin connector that supplies the coil pack power?
~Alex
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Jordan_751
- Posts: 11
- Joined: Sat Dec 08, 2012 10:04 am
- Car: 240sx/ rb20 wiring
Re: Rb20det running on front 3 cylinders (no spark on rear 3
I really need some opinions and help on what my problem could be with my rb20 s13. the car was running fine and I pulled into the mall one day and it was like someone reached and shut the key off. Then all it would do is just turn over. And the power transistor was never grounded. It was just pushed to the back of the block. And I need the bracket that you bolt with it to bolt on the motor. I just can't think of another reason for why the car isn't firing. Any ideas?? If so let me know please!