Coils interchangeable? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

prodjay10 · 12-17-2019, 08:09 PM

Are round and square coils interchangeable? Looking to diagnose a misfire by replacing half the coils with some spares.

prodjay10 · 12-17-2019, 08:10 PM

Gen3

**mongocanfly** · 12-17-2019, 10:31 PM

Are the plugs the same?...I thought I had a set of round coils but I dont..

prodjay10 · 12-19-2019, 04:58 PM

I think the plugs are the same, but they have different mounting holes. I just replaced all 4 with harness and bracket. That didn’t solve my misfire. Turns out the spark plugs were cracked. I must have done that during the swap.

prodjay10 · 12-28-2019, 03:15 AM

Replaced the cracked spark plugs and the misfire codes went away, gas mileage went up, no more shake or shake on acceleration. But if I pull up the misfire counter I see that misfires are being detected. There aren't enough to set a code. Is it normal? How would I fix this?

prodjay10 · 12-28-2019, 03:16 AM

I changed the spark plug wires all the way around, ran some fuel injector cleaner, and I changed the oil. Thats about it.

12-17-2019, 08:09 PM	#1
prodjay10 Registered User Join Date: Jun 2016 Location: Phoenix AZ Posts: 429	Coils interchangeable? Are round and square coils interchangeable? Looking to diagnose a misfire by replacing half the coils with some spares.

12-17-2019, 08:10 PM	#2
prodjay10 Registered User Join Date: Jun 2016 Location: Phoenix AZ Posts: 429	Re: Coils interchangeable? Gen3

12-17-2019, 10:31 PM	#3
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,670	Re: Coils interchangeable? Are the plugs the same?...I thought I had a set of round coils but I dont.. __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

12-19-2019, 04:58 PM	#4
prodjay10 Registered User Join Date: Jun 2016 Location: Phoenix AZ Posts: 429	Re: Coils interchangeable? I think the plugs are the same, but they have different mounting holes. I just replaced all 4 with harness and bracket. That didn’t solve my misfire. Turns out the spark plugs were cracked. I must have done that during the swap.

12-28-2019, 03:15 AM	#5
prodjay10 Registered User Join Date: Jun 2016 Location: Phoenix AZ Posts: 429	Re: Coils interchangeable? Replaced the cracked spark plugs and the misfire codes went away, gas mileage went up, no more shake or shake on acceleration. But if I pull up the misfire counter I see that misfires are being detected. There aren't enough to set a code. Is it normal? How would I fix this?

12-28-2019, 03:16 AM	#6
prodjay10 Registered User Join Date: Jun 2016 Location: Phoenix AZ Posts: 429	Re: Coils interchangeable? I changed the spark plug wires all the way around, ran some fuel injector cleaner, and I changed the oil. Thats about it.



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