gcthree

Clear out of the blue, my car is now throwing 3 simultaneous CELs accompanied by rough running initially after startup, though it does clear once you've run the car. I have removed the MAF sensor and cleaned it (not that it was dirty in any way). I've posted a video of the rough running (as though a plug was fouled...). I understand that it could be a number of things, but is there a 'most likely' scenario to start the chase?

Thanks!
Bob

808Bill

https://www.renntech.org/forums/topic/10416-p0507/

z driver 88t

Does it do it more when the engine is hot vs. cold? Next time it does it, loosen the gas cap and see if the problem clears (may still throw a code, but may run smoother). You won't want to drive it that way, you'll start smelling fuel fumes pretty quickly, but it will give a clue as to the failure. If it does smooth out its most likely traceable to one of three things associated with EVAP system. Also report if it throws an 1130 at some point as well.