Cobb AP3 Misfire Count

[Heardcuh]

Not able to get the gauge to show up, it's not even in the list in alphabetical order. Anyone know any reason it might not show up?

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[PRG3k]

What is the exact name of the stat you're looking for? There are a couple diff. ways to monitor knock on the AP

The correct stat to monitor is 'Ignition Correction (specific cylinder)'. The other stat is 'Knock Count (specific cylinder)' which is not as important.

 

[Heardcuh]

"Misfire count" I believe. One time about 2 months ago after a launch on Tune+ with the pregapped denso's, I slipped the clutch slowly while using the Tune+ LC and heard a weird crack as I went, shifted into second but then let off because of what I heard. When I came to a stop I had a really rough idle and checked the tailpipes, every few seconds a discordant, strong puff of exhaust gas would blow out and disrupted the normal idle rhythm. I continued to drive home on it like that. When I finally pulled the plugs I noticed the insulator had slid down on my cyl 3 plug. Before that I had been monitoring "Misfire Count" on my Accessport and the number would reflect 1, 8, 50 and eventually get to a number like 8492748298473892874928174. Scared me a bit. I had to replace the plugs with some OEM plugs from the auto parts store and drove on those and the Cobb OTS tune for a while before I got more plugs from Tune+. The thing is though, my idle is sometimes a little weird, like there's a beat out of sync sometimes and when cruising down the highway my AFR will sometimes go from high 12's to high 14's randomly when I'm on completely straight roads so I'm wondering if I'm having misfires or if I did damage to my cat after driving around after I had that plug with the insulator that slid down.

 

[stevnoof]

Yea u probably shouldn't see a godzillion misfire counts. One is to many. Maybe bring it into a local shop for inspection, tell them what happened.

 

[Shushunmire]

Shouldn't AFR always be at around 14.7:1?

 

[TEXAS HEAT]

Shouldn't AFR always be at around 14.7:1?

Targeted afr's are usually 14.7 to 1 at idle and cruising which is stoich for unleaded non ethanol fuel. For e10 stoich is actually a little more rich at 14.3 to 1.

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