misfire

KTM530

Supramania Contributor
Jan 24, 2011
154
0
0
santa rosa
so pretty bad intermediate mis, I can see it at low idel and high idel on my wideband. It misses and gets rich. Right before the rich condition on my wide band O2 i can hear it mis almost like a "bump" noise (could this be detonation?) It just does it every now and then. so its got to be ignition right? I just changed my plugs to NGK's there gaped at .030" and the wires are a year old. New autozone CPS,used Precision 570cc injectors. soldered injector clips. Ignitor ground mod done a while ago and coils are bound to the same ground next to the battery. yesterday i swapped my coils out for a whole different set, and no results. maybe a sticky valve?
Again its completely random as far as i can tell.

I have not yet tried to check any resistance values on any equipment, what should I check first?
 
Last edited:

Devin LeBlanc

Banned
Apr 7, 2010
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Las Vegas NV.
Is this what it does? Watch the whole video..


[video=youtube;qXnqXe9h3S4]http://www.youtube.com/watch?v=qXnqXe9h3S4&list=UUXAoUj18n733K2VTCq8Kn7g&index=82&feature=plcp[/video]
 

KTM530

Supramania Contributor
Jan 24, 2011
154
0
0
santa rosa
no, mine seems to make more of a noise and have more of a affect on the engine. that seems very subtle.