Very intermittent misfire 2002 camry

Diagnosing a misfire for a 2002 Toyota camry. It's very intermittent and takes weeks to set a check engine light. I got some secondary ignition captures and curraet ramp patterns also. Would this current ramp pattern be enough to call a coil?

Eh, I don't think those captures necessarily suggest an ignition issue. Any freeze frame data? Mostly wondering about a cold start issue. Flattened intake gaskets or a leaking head gasket, like that.

Well I didn't snap a pic of freeze frame. But I did notice fueltrims were high. They get higher with rpms.

if its that intermittent. try swapping the injector and drive it for a few weeks . if its a 4 cylinder there easy to change. how high do the fuel trim numbers go?? an ignition misfire fuel trims dont go that positive.

Around 20 percent

id say either an injector or an intake gasket leaking

I was thinking the same but fuel trims rise with higher rpms.

then id say injector for rising trims. if i were working on it and it takes a few weeks to set the code id swap the injector and ship it then see if the code follows

I'm with cheryl, injector swapping would be super easy in this case.

FWIW, I went through a very similar situation with my Scion. Intermittent misfires first thing in the morning, then fine the rest of the day. Moved coils/plugs/injectors because it was so random. Finally did the classic water spray test on the intake, failed miserably. :lol:

Even if a miss isn't happening, try the water test anyway. Any kind of failure is grounds for gasket replacement.

Thanks for the insight guys

As already said a single cylinder misfire in the initial first few seconds after start up points to a head gasket issue but you would normally expect some coolant loss.

I had a strange one a few months back it was a misfire on a single cylinder lasting only for about 100 yards at about 1/2 a mile after a cold start it , it turned out to be an inlet gasket leak. The explanation I came to was the cold start enrichment was going off but the engine wasn't fully warm.