I have a 2008 dodge ram 1500 hemi 4 by 4. It has 94000 miles on it. I went last week and had a flowmaster 40 series installed. The truck ran great through out the day and then that evening she started acting funny. When I would give it gas just normal as if I was stopped at a light, it sounded and felt like it building up pressure in the muffler and it would bog down, then make a popping noise and then run fine, until I stopped again. About 3 or 4 days later my checked engine light came on. Went to auto zone had it read and showed (exhaust gas recirculation A sensor high). About 2 days later the check engine light went off, and hasnt come back on. But the truck is still doing the same thing. Today I turned down on my street, gave it some gas, when I did it wouldn't go anywhere, it wouldn't rev up, nothing, it didn't die, just stalled out for about 2 seconds and starting running fine again. Any thoughts on what this could be would be greatly appreciated.

 

check your pcv tube and or pcv valve

the tube that runs from the valve cover to the air filter tube

might be loose or cracked

 

Take it back to the muffler shop and get it checked out.