Angry Alex

I already checked the coilpack, and changed the plugs. I still I have constant misfires in Cyl3. Any sugestion as what to do next as to what to do next?

Ray Khan

have you tried any cleaners? Seafoam or BG44k? I suggest using old plugs when you run the cleaner though especially if you use something in the gas tank and get under boost. If you run some seafoam thorugh the intake manifold, I think the plug are ok.

Angry Alex

the misfires count up about 1 every 2 secs in cyl3 and it continues to misfire underload.

Audi2ptzero

Misfire can also be caused by being too lean in that cylinder, so you might want to move the injectors around to rule it out.

Devious27t

i would say its those injectors as they have a very inconsistent spray pattern and your idle issues are most likely caused by the min pulse rate on the greentops being to high for what the car requests.

in my logging of pulse rate i found that the car requested a pulse rate of 1.64 m/s while the min. on the greentop is 1.70. this caused major issues with misfiring at idle. also when i logged the car at WOT with the greentops in the injector pulse width would increase too quickly causing misfires in multiple cylinders, it gradually got worse and worse. started with one cylinder and spread across three. i have since switched my injector setup.

Enclave

What injectors did you end up running?

Devious27t

they are siemens injectors.