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Discussion Starter #1
So I am getting multiple misfire codes. Ford tech says it is due to the turbo smart blow valve dummy plug failing. The valve bane with the MAPerformance kit. Charging me a diagnostic charge, but could a vent to atmosphere BOV cause all of this? This is being run with the Ford Performance Tune on a 2018.

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So I am getting multiple misfire codes. Ford tech says it is due to the turbo smart blow valve dummy plug failing. The valve bane with the MAPerformance kit. Charging me a diagnostic charge, but could a vent to atmosphere BOV cause all of this? This is being run with the Ford Performance Tune on a 2018.

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Something else is causing the misfire codes likely. As for the bypass valve code... If it is the turbosnart defender plug then you can get a replacement from AM.

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Discussion Starter #3
So I received the defender plug from Turbosmart today, it is testing in the 38-39ohms range. I am certain that is because I am using probes, not alligator clips (hard to keep steady contact). That should explain the P0035 Code. The old one, that the tech said was causing the problem, registers 0ohms. The old one definitely appears melted, so I am wondering if there is a place I should zip tie it to to keep it away from heat. The misfire codes, I am still wondering about. Bad gas? Dealer seems to think it is a cascading effect from the sensor, but I'm skeptical.
 

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So I received the defender plug from Turbosmart today, it is testing in the 38-39ohms range. I am certain that is because I am using probes, not alligator clips (hard to keep steady contact). That should explain the P0035 Code. The old one, that the tech said was causing the problem, registers 0ohms. The old one definitely appears melted, so I am wondering if there is a place I should zip tie it to to keep it away from heat. The misfire codes, I am still wondering about. Bad gas? Dealer seems to think it is a cascading effect from the sensor, but I'm skeptical.
There are over a dozen reasons you might see misfire codes on the ECU. It's best to start with the ignition system. If the misfire is happening in a single cylinder then check the coil to see if it is bad. Start from the easiest and cheapest fix and work your way up to the most expensive fix. Bad gas can certainly cause a misfire code as well. I fill up with 93 pump at a random gas station once and popped a cylinder 1 misfire code that has since disapeared.

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Discussion Starter #5
Misfire codes are gone. Going to clear perm bypass valve code and see what happens. I did fill up at Costco and that’s when the misfire codes started. Different Costco than my normal one. Arlington vs Dallas. The one in Dallas probably gets more turn over on the premium than the Arlington one. I see lots of cars there that require premium. Arlington, probably not as much.
 

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Discussion Starter #6
Well, no codes in three days. I’m going to assume it was the dummy plug for the BOV.
 
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