Thanks for the quick reply. I edited my original post to include more info. I drove the car maybe 30 minutes total before I started to smell the slight scent of exhaust fumes. This has never happened before when switching from cold to hot. I don’t switch the vent dial to heat, I leave it on max and just switch the temperature dial from cold to hot.
I’m not sure if this is related, but about 3 days ago I had a friend help me clean the area behind the EGR valve a bit (I think it could use a more thorough cleaning) in an effort to remove some of the build-up.
Cleaning it did appear to help with the acceleration issue that I was having, although it did not eliminate it completely. The check engine light went out immediately after cleaning and I had better acceleration, but eventually the light came back on.
I started having the issue with acceleration after replacing the EGR valve. For example, if I was trying to do a hard acceleration onto the interstate while merging the engine seemed to stutter out and I would have to lift my foot off the accelerator and press it down again and do that process repeatedly until it got up to about 35 miles per hour and then it would accelerate normally. If I keep accelerating, the check engine light starts blinking. I’ve been driving like this for the past five months since replacing the EGR valve. I’ve been doing more driving lately, so I decided to have the EGR valve area cleaned.
There was no issue with acceleration until I had the new EGR valve put on about 5 months ago. The only reason I had the EGR valve replaced was because that was supposedly the reason why my check engine light was coming on according to AutoZone when they did the check engine light testing.
I saw a video on YouTube that said one reason the EGR code was coming up could be because the housing behind needed to be cleaned versus the EGR being bad.
I backed into a curb about a month ago and then my car was immediately louder afterwards upon acceleration. I thought maybe it put a hole in the muffler? Could these issues be related to the reason why I am smelling exhaust fumes only when the heat is on?