Okay, so gave it a shot and honestly not sure what it did. A few times while it was sputtering it felt like maybe it was getting sucked back a little but I was holding it tight to the tailpipe. Then if I looked at it closer while it was sputtering it looked like it actually pushed it out. I’ll have to do it again.
Also just to keep you updated first 20 miles I drove it today no issues I noticed. Towards the end of my trip it started up. Had some real bad stumbles at one point where it felt like it was trying to stall and jump back to normal. The stft did jump up real high while that occurred. After a few seconds it stopped and when I got pulled in I had the sputters on and off and started the test.
While idling I snapped the throttle a few times. I noticed the first couple of times I had some smoke or vapor come out the exhaust briefly. Wasn’t heavy and it dissipated quick. It happened a couple of times but then no more smoke when snapping the throttle. I kept it running and noticed the sputtering had pretty much stopped. I drove it up and down the street and didn’t really feel anything. Stopped and got gas and didn’t have any issues after restating and driving back. Kind of weed cause other times the sputtering would get worse and worse. Even would get some stalls. I did notice a strong smell of maybe burnt fuel if that makes sense from the exhaust and it was really hot back there.
PS, not sure if this is important or not but noticing when I get a check engine light whether it a 300 or 305 the freeze frame data shows that it went into open loop.
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Thursday, July 9th, 2020 AT 4:25 PM