Engine Misfires

gippy87 · 09-20-2017, 01:48 AM

I'm playing around with my aeroforce interceptor gauge and set it to monitor each cylinder for misfires. While cruising i noticed i was getting misfires at random. No consistency to when it happened or which cylinder. Other things to note are I there was no indication of a misfire in the way the car was driving or the way it sound and no codes are being set for misfires even though the scanner is showing many. What gives?

ChicagoTommy · 11-15-2017, 05:12 AM

First of all, how many is 'many'? If it's a single digit number, I wouldn't even think twice about it as it's well within the margin of error. GM knows that the crank position sensor will report very very slight variances in crank speed. You usually need to be in the low triple digits on the counter before you'll trip a CEL for misfires, and once you're at that point, you'll really feel it. As long as you're not feeling anything and no CEL is present, proceed as normal.

09-20-2017, 01:48 AM	#1
gippy87 Drives: 2016 2ss Join Date: Aug 2016 Location: RI Posts: 179	Engine Misfires I'm playing around with my aeroforce interceptor gauge and set it to monitor each cylinder for misfires. While cruising i noticed i was getting misfires at random. No consistency to when it happened or which cylinder. Other things to note are I there was no indication of a misfire in the way the car was driving or the way it sound and no codes are being set for misfires even though the scanner is showing many. What gives?

11-15-2017, 05:12 AM	#2
ChicagoTommy Drives: 2017 Camaro; 2017 Acadia Denali Join Date: Jun 2016 Location: Chicago, IL/Williams Bay WI Posts: 1,022	First of all, how many is 'many'? If it's a single digit number, I wouldn't even think twice about it as it's well within the margin of error. GM knows that the crank position sensor will report very very slight variances in crank speed. You usually need to be in the low triple digits on the counter before you'll trip a CEL for misfires, and once you're at that point, you'll really feel it. As long as you're not feeling anything and no CEL is present, proceed as normal. __________________ This is in no way a personal attack or confrontation, and is not necessarily the view of the management or sponsors, and the thoughts contained herein are mine, and is not intended to hurt anyone's feelings or ruin their delicate self esteem, or to invalidate anyone's personal views or thoughts, nor is it a condemnation of anyone's race, religion, sex, sexual preferences, handicaps, or intellectual abilities.

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