d17beast

i finally got a used ecu and had it reflashed to run my car. then about two weeks later it starts to stutter a lot and idle really bad. at times if i left the car warm up, it drives just fine until i stop and restart it again.

so today, i used a CanOBDII reader and it says all my cylinders are misfiring. codes were P0301, P0302 P0303 P0304, AND P0300 random misfire (is what the last one said).

but before i used the obd2 reader, my car would shake and stutter as i drive, it never died on me but sometimes the speed would just stop at 50mph then speed up again. not sure why and when this last for a day or two the CEL light comes on then dissapears.

im at a lost and i dont really know where to start so if some of you guys can give me quick advice it would probably be very helpful.

its probably written somewhere in these threads but im not too familiar with it so please help if you can. thanks.