Just recently got my engine replaced, only 500 miles on it. Check engine light was on took it to the shop said they fixed it. Its popping at idle when engine is cold. Anyone have any idea what the problem can be? The dealer clearly doesnt know what it could be. Heres a video

 

it's a new engine? or did they try to use some sea-foam and give it back to you while pocketing all the cash from Mazda?

 

*Refurbished engine and I doubt a big dealer would commit fraud, maybe just some shotty work

 

have u replaced all coils and plugs and wires and check cat during work?

is the engine fully warm up in the video?

 

Engine is not fully warm. It does do it when its warm though but on ocasion it stops. And I did realis they replaced some wires but left some old ones in? Same with the plugs and coils i guess but the old engine started up and sounded fine.

 

I get the same idle pop after taking the car out of storage. Fresh oil and fuel and a good, slow warm-up gets rid of it on mine. And like others said, check the health of your ignition.