misfires... after cam

[ZL1Killa]

If it was one or two plug wires that would show up as a
specific cylinder misfire code. More likely is that the cam has
just made the motor "trip the threshold" for declaring a misfire
(as opposed to actual misfiring). More crank ripple does this,
see it with lightweight torque converters too. If it stays just
"random" then I'd start upping the threshold values in the
misfire tables (x2 everything for starters).


http://www.ls1tech.com/forums/showthread.php?t=983021

Where are these tables that he is talking about in EFI LIVE, lol. it has been a while since I changed my cars tune and messed with it so i'm a little rusty. gettin back on that learning curve

[ZL1Killa]

ok found them. which ones do I change to a higher value? all of them?

[ZL1Killa]

guys, any input. Not trying to be demanding but figuring that after cam swaps and such that people would know this as an easy one

[charcold-bowtie]

perhaps this will help.

http://forum.efilive.com/showthread.php?t=6835&highlight=knock+sensor

[ZL1Killa]

well... maybe. thanks for that post/link too. didn't get a chance to log misfires, but I did mess with the misfire tables. I'm not getting knock/detonation, so I don't think it applies to me

[ZL1Killa]

ok, had to modify the misfire thresholds table(s) in the tune and it went away, car runs great. for some reason 220 or low 22x cams like to come right within the factories computer misfire threshold and trigger it.

problem solved and she runs great