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Multiple misfires after plugs and coil pack replacement?

Tiny
JOSEPH.FOLWER
  • MEMBER
  • 2006 TOYOTA CAMRY
  • 3.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 245,000 MILES
Had the po351 originally and replaced it along with 2 through 6 now after new coils and plugs still misfires and bogs down of replacing all of that will not accelerate to 1,000 RPMs and spits and sputters.
Wednesday, June 19th, 2024 AT 7:12 PM

29 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Hi,

The original code indicates there isn't a feedback signal from the ignitor indicating the coil is working. I'm not sure what may have changed since the work was done. Have you checked to see if there are additional codes stored now?

As far as testing, I attached the diagnostics for the P0351 code below. Note that all cylinders can be checked using the same process. Take a look through them and let me know if you are comfortable performing them.

Take care,

Joe

See pics below.
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Wednesday, June 19th, 2024 AT 7:49 PM
Tiny
JOSEPH.FOLWER
  • MEMBER
  • 19 POSTS
Good evening. I believe it may be something other than the coil packs because I replaced the #1 with w new one and it came back with a p0351 again. I hope I can get these codes erased and start fresh. Please is there any way I can call you?
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Saturday, June 22nd, 2024 AT 5:08 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Hi,

For some reason, the PCM isn't getting a feedback signal that the cylinder is firing. Do me a favor. Switch the number 1 coil (New one) with cylinder 2. See if the code changes cylinders.

As far as calling, I am required to keep all communications here, online. I hope you understand. Also, to delete the code, you need a scan tool. By chance, do you have one?

Let me know what happens. Also, let me know how the vehicle is presently running.

Joe
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Sunday, June 23rd, 2024 AT 8:11 PM
Tiny
JOSEPH.FOLWER
  • MEMBER
  • 19 POSTS
I have done that car bogs down when pedal is pressed will spit sputter backfire.
Please tell me this is not a harness issue.
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Monday, June 24th, 2024 AT 8:05 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Hi,

Is it worse when you switch them? Does it produce a new code? As far as the problem, it could be in the wiring or the PCM.

Let me know if the code changes and if the vehicle runs worse when you switch the coils.

Joe
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Monday, June 24th, 2024 AT 10:18 PM
Tiny
JOSEPH.FOLWER
  • MEMBER
  • 19 POSTS
The codes are as follows, but I have another problem now my battery is dead so I have to charge it.
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Wednesday, June 26th, 2024 AT 4:33 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Hi,

Is the battery issue due to trying to start the engine? I ask because a weak battery or low voltage can cause all types if electrical issues.

As far as the codes are concerned, the only active one is the P0351. That will require the diagnostics I attached above. Let me know if you are comfortable performing them. Additionally, let me know about the battery. Once it is recharged, you may want to have it load tested at a parts store. Most will do it free of charge.

Let me know.

Joe
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Wednesday, June 26th, 2024 AT 9:30 PM
Tiny
JOSEPH.FOLWER
  • MEMBER
  • 19 POSTS
I have bought a new battery charger and will charge up hope it will hold at least 13.6 volts so the ECU can be properly read.
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Thursday, June 27th, 2024 AT 3:34 PM
Tiny
JOSEPH.FOLWER
  • MEMBER
  • 19 POSTS
Attached below is a video of the car running an surging maybe this will help.
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Thursday, June 27th, 2024 AT 4:09 PM
Tiny
JOSEPH.FOLWER
  • MEMBER
  • 19 POSTS
Okay, I have charged the battery and it's up to full cap now. I cleared the codes and the came back PO 351, PO352, PO 353, PO 354, PO355, and PO356.
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Thursday, June 27th, 2024 AT 4:33 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Hi,

The ECM is indicating there is no feedback from any of the coils. It is very unlikely that all coils failed.

Since all six coils have a common IGF wire to the ECM, that is where I would start checking. The wire may be damaged or there could be an issue with a connector. Worst case is the ECM has failed.

Each coil should have a white wire with a red tracer. This wire ties all of the coils together and then goes to the ECM. See if you are able to locate the wire I'm referring to and check it for damage.

Let me know.

Joe

See pic below.
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Thursday, June 27th, 2024 AT 8:28 PM
Tiny
JOSEPH.FOLWER
  • MEMBER
  • 19 POSTS
Okay, where do I get a larger photo of this? It is also I cannot just buy the harness for the coil packs the have to be hard wired in. Fuses are good in both places, so it is very likely I have a voltage drop going to the ECM. Also, I need the colors and the pin set for each coil. Please. However, if this wire puts the all the coils in a series there could be just one failure point or multiple failure points in this wire.
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Friday, June 28th, 2024 AT 6:58 AM
Tiny
JOSEPH.FOLWER
  • MEMBER
  • 19 POSTS
Ok Where do I get a larger photo of this. It is also I cannot just buy the harness for the coil packs the have to be hard wired in. Fuses are good in both places so it is very likely I have a voltage drop going to the ECM. Also I need the colors and the pin set for each coil. Please. However if this wire puts the all the coils in a series there could be just one failure point or multiple failure points in this wire.
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Friday, June 28th, 2024 AT 6:58 AM
Tiny
JOSEPH.FOLWER
  • MEMBER
  • 19 POSTS
Also, can you provide the location of each for each coil pack so I can make sure I have in the correct sequence in the harness.
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Friday, June 28th, 2024 AT 7:00 AM
Tiny
JOSEPH.FOLWER
  • MEMBER
  • 19 POSTS
I need the coil pack wire connection order and color so I can make sure they are in the correct place.
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Friday, June 28th, 2024 AT 9:57 AM
Tiny
JOSEPH.FOLWER
  • MEMBER
  • 19 POSTS
Can you help me verify which wire goes to which pin? I have seen the white and red wire they may be crossed somehow, I just need the information to best process this repair.
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Friday, June 28th, 2024 AT 2:15 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Hi,

I'm not sure what you need. The wiring schematic above shows the coils and the wire colors.

If you follow the IGT wire back to the ECM, it shows IGT 1, IGT 2 and up to six. Those are the cylinder numbers. If you look at the pic below, I included the cylinder configuration. That way you will know which cylinder to look at. Additionally, the arrow in the picture points toward the front of the vehicle. Therefore, bank 1 is nearest to the firewall.

Let me know if this helps.

Joe

See pic below.
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Saturday, June 29th, 2024 AT 7:32 PM
Tiny
JOSEPH.FOLWER
  • MEMBER
  • 19 POSTS
Well, this is what happened. I got the wires back right and it ran fine for a while however after a while it started hesitating and running rough up to 50 then after that it smooths out but it vibrates a lot like the coil pack issue but no codes, so now what?
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Monday, July 1st, 2024 AT 5:15 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Hi,

Do you notice any dark smoke from the exhaust or odd smells from the exhaust? If there are no codes, this will get a little more difficult to diagnose.

Let me know if there is anything out of the ordinary that you notice when this happens.

Joe
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Monday, July 1st, 2024 AT 8:22 PM
Tiny
JOSEPH.FOLWER
  • MEMBER
  • 19 POSTS
No, that not that I can tell. Loss of power through and vibrating through first and second.
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Tuesday, July 2nd, 2024 AT 5:53 AM

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