P1300 code

Tiny
KENNEYG
  • MEMBER
  • 2001 TOYOTA TACOMA
  • 3.4L
  • V6
  • 4WD
  • AUTOMATIC
  • 31,000 MILES
Truck started running real rough suddenly. Reader showed I had a P0304 code. I checked #4 plug and had a hole in the rubber that goes over the spark plug. Only 31,000 miles on a rebuilt engine with new plugs and wires, so I replaced all wires and tubes (best grade belden) down from the coils, not the plugs or coils though. Now it won't run and I get the 1300 code (coil). Should I just replace all coils since I don't know if they were replaced with rebuild or could it be something else? I'm not sure how to check each individual coil. Thanks in advance.
Wednesday, December 18th, 2019 AT 4:09 PM

3 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

Any time you even suspect an ignition component, i.E. Spark plug, spark plug wires, coil, coil packs, or Coil On Plug [COP], of being bad, you should replace it without question. This will prevent Direct Trouble Codes[DTC][s] like this from happening, and it is a good policy to follow. This is what I do with my own vehicle. I hope that this helps.

Thanks,
Alex
2CarPros
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Wednesday, December 18th, 2019 AT 4:22 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,009 POSTS
Hello,

Here is how to replace the coils in the diagrams below and the video as well:

https://youtu.be/rU6uxV5dLoA

Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.
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Wednesday, December 18th, 2019 AT 5:41 PM
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

I'm sorry, I forgot to add this guide down below on how to inspect and test your vehicle's ignition coils. Please go through it and get back to us with the results.

Thanks,
Alex
2CarPros
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Thursday, December 19th, 2019 AT 1:12 AM

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