3.8 l number 1 plug not firing

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Jun 22, 2014 | 05:05 PM

asmith

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3.8 l number 1 plug not firing

number 1 plug was not firing I replaced that ignition and coil and it is still not firing on that plug

Jun 22, 2014 | 05:21 PM

viniepooh

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From: MIchigan

Ignition module maybe?

Jun 22, 2014 | 05:33 PM

asmith

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Do you know of any way to test the icm

Jun 22, 2014 | 10:51 PM

Soft Ride

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Welcome to the forum Andy..Here is a how to on testing ICM
https://www.gmforum.com/trouble-shoo...m-test-299761/
I assume you have tried a new spark plug & wires.. yes?
Have you scanned for any engines codes?

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Jun 23, 2014 | 06:26 AM

jwfirebird

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look for corrosion, alot of times that pin is corroded, you can sand it and put dielectric grease on it

Jun 23, 2014 | 09:02 AM

Mike

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Shouldn't matter. If #1 isn't firing, then #3 shouldn't be firing either. They both fire at the same time. It'* either a bad sparkplug wire or a REALLY bad sparkplug.