The check engine light is flashing? If so that's a miss fire. Check your oil and coolant for milky colors for the headgasket or do it right and do a compression check
how cold is it? you sure its not just condensation inside the tailpipe?
That's what I was gonna say...and you'll need a compression checker. And also stumbling could.be because of the misfire....if you haven't changed your plugs, wires, and coil packs I'd go ahead and do all of it.
Does it go away after the engine is warmed up and you drove a minute??
If you blew the hg chances are your car would heat up and probably over heat real fast
Yes and normally this would have happened when it was actually hot outside... Check coolant and oil level and consistency before anything.... coolant could have oily smell turning brown and oil milky
that was quick
That's what she said!