Extremely rough idle, blowing black smoke...5.0 EFI
Cars been doin this for awhile now, once I start it up (both cold and warm), the idle drops really low (but the revs bounce back to normal idle while it does it) and it struggles to stay running, and every now and then it dies. It blows black smoke out the tailpipe when it does this, so I know its dumping in way too much fuel. I'm thinkin a coolant temperature sensor or something, telling the engine to put in more fuel that it needs. Any clues? If so, this shouldnt be a too expensive fix? seeing that I'll be doing it at my shop.