Author Topic: I-DSI L13A Fit join both coils pack signal cable from the same cylinder  (Read 1145 times)

ronclone

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  • Posts: 2
  • Country: ve
  • My Honda: 2007 honda fit L13A
Hi, new in the community and would appreciate your help guys.

2007 fit L13A engine with i-dsi, I have a problem and I need the car as soon as possible for work.

Is it possible to join 2 signal cables for the coil packs of the same cylinder?

I had a short and it seems to have damaged the pcm. Cylinder 1 doesn't get any signal from the pcm in the front coil pack and is running just with the back coil. It does get 12v and good ground, just no signal. I can't afford a pcm at the moment and thought it might be possible to send the same signal to both coil packs. I know I might loose some efficiency since they're not meant to fire at the same time, but I wonder if it is at all possible until I can replace the pcm.

Will the increased load further damage the pcm?

Does both coils work at all rpms? Or is it the case that they only work under certain circumstances?

Any help would be appreciated. Since I just can't replace the ECU at the moment. Not an option for me right now.

c.lday44

  • Approved Member
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  • Posts: 58
  • Country: gb
  • My Honda: 2007 Honda Jazz SE 1.4 i-DSi
Re: I-DSI L13A Fit join both coils pack signal cable from the same cylinder
« Reply #1 on: August 07, 2025, 06:34:40 PM »
I'm not sure on the possibility of your suggested repair, but when I last changed my spark plugs I completely forgot to plug the front coil pack on cylinder 4 back in. I did not notice, the car ran great still, I drove it like that for months before I scanned it with an OBD reader out of curiosity when scanning a friends Mini R50, saw the code, pulled the cover off the top and saw it unplugged. It sounded fractionally smoother once I plugged it in but it was by no means misfiring.

Long story short, you'll probably be okay to drive it for a short while on one spark plug

ronclone

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  • New Member
  • Posts: 2
  • Country: ve
  • My Honda: 2007 honda fit L13A
Re: I-DSI L13A Fit join both coils pack signal cable from the same cylinder
« Reply #2 on: August 08, 2025, 04:13:36 PM »
I'm not sure on the possibility of your suggested repair, but when I last changed my spark plugs I completely forgot to plug the front coil pack on cylinder 4 back in. I did not notice, the car ran great still, I drove it like that for months before I scanned it with an OBD reader out of curiosity when scanning a friends Mini R50, saw the code, pulled the cover off the top and saw it unplugged. It sounded fractionally smoother once I plugged it in but it was by no means misfiring.

Long story short, you'll probably be okay to drive it for a short while on one spark plug

Thanks for the info. I decided against doing the jump between coils thing since I figured I wouldn't gain much, just double the spark.
You're right. I've been driving it without the front coil and it still runs ok. That gives me some time to fix whatever is happening with the ECU.

Added bonus of the dsi is the redundancy it adds to the ignition.


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