2019 Mustang GT "Bogging" Issue

[Guitar00Dude]

I wasn't insinuating you were, so I apologize if it seemed that way. You were right to reach out to Ford. It's all a balancing act. You do need to push to get passed the first wall of defense, so to speak, but you definitely don't want to irritate the person that is the difference between a "it's normal" and "all fixed!"

As per the issue causing harm. Does it stop stuttering if you give it more throttle? More importantly, does it just downshift? If so then I wouldn't say you're in any danger. It just seems like the computer thinks you're accelerating for a split second. PCM update would be my first move, but not the MAF sensor. That seems like an odd course of action, IMO. It's not surging, and you didn't mention it felt down on power. I also don't think bogging is the right term. The engine is bogged down, or lugging, but that's more of a byproduct of the issue at hand because you're in a high gear at real low engine speeds.

No problem Defeeds. Just wanted to take the opportunity to make sure I made it known I am doing everything possible to not be an @$$ to anyone trying to help me. It doesn't down shift when it happens. I've had my car in twice for this and the first time they claimed they updated the PCM to the latest version to fix this issue.

Yeah.. didn't really know what else to call it.. it's like i am letting off the throttle a bit, but the car isn't slowing down. I have keeping my pedal constant. So I would think it is not the throttle body, but the IMRCs.. that's my bet right now. And I wonder if the "Active Grille Sensor" they said they changed was actually the IMRC sensor? I am pretty sure we don't have active grilles.

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[Dfeeds]

No problem Defeeds. Just wanted to take the opportunity to make sure I made it known I am doing everything possible to not be an @$$ to anyone trying to help me. It doesn't down shift when it happens. I've had my car in twice for this and the first time they claimed they updated the PCM to the latest version to fix this issue.

Yeah.. didn't really know what else to call it.. it's like i am letting off the throttle a bit, but the car isn't slowing down. I have keeping my pedal constant. So I would think it is not the throttle body, but the IMRCs.. that's my bet right now. And I wonder if the "Active Grille Sensor" they said they changed was actually the IMRC sensor? I am pretty sure we don't have active grilles.

I'm pretty sure the base GT has the active grille shutters. It's the performance pack 1/2 that don't have it.

Our cars don't have a cable driven throttle, so your pedal position is more like a sensor the computer uses to determine how much to open the butterfly valve on the TB. Think of it like a keyboard. You press the A key and A pops up on screen. Then you spill water on your keyboard and now when you press A you get a string of letters instead. The physical input means nothing if there's a malfunction down the line. It's hard from a single video but it seems like your car just isn't accurately registering your throttle position. Hence why several have suggested the TPS is at fault.

I know, on older Mustangs that were cable driven, it was easy to see what was happening when a TPS went south. You could hold an voltage meter up to the wires and actually see the issue. The voltage would be a steady increase as you opened the throttle, but at one specific spot it would get a massive voltage spike or be a dead spot. So you would be fine until you hit that exact spot. This led to many misdiagnosed repairs if someone preferred to throw parts at a problem.

 

[Guitar00Dude]

I'm pretty sure the base GT has the active grille shutters. It's the performance pack 1/2 that don't have it.

Our cars don't have a cable driven throttle, so your pedal position is more like a sensor the computer uses to determine how much to open the butterfly valve on the TB. Think of it like a keyboard. You press the A key and A pops up on screen. Then you spill water on your keyboard and now when you press A you get a string of letters instead. The physical input means nothing if there's a malfunction down the line. It's hard from a single video but it seems like your car just isn't accurately registering your throttle position. Hence why several have suggested the TPS is at fault.

I know, on older Mustangs that were cable driven, it was easy to see what was happening when a TPS went south. You could hold an voltage meter up to the wires and actually see the issue. The voltage would be a steady increase as you opened the throttle, but at one specific spot it would get a massive voltage spike or be a dead spot. So you would be fine until you hit that exact spot. This led to many misdiagnosed repairs if someone preferred to throw parts at a problem.

Gotcha. Yeah. I think we have had drive by wire since 2005. I agree. I wouldn't be surprised if they try a new TPS when I drop my car off in a couple weeks.

 

[Booch443]

I purchased a brand new 2019 Mustang in March of this year and took it in for 500-mile complimentary oil. One week after the oil change, the first cold start of the day (2-second press of start button) the engine labored (typically starts right up) then lagged and flooded - gas smell filled the cabin while the gauges danced all over the board for about 10 - 15 seconds to include fuel pressure. After running at idle for a bit, I took it out for a 5-mile drive and the results are loss of about 1/3 of the normal power/sluggish. Ever since the occurrence, the vehicle hesitates, slow to engage, and the power band is greatly diminished. I reached out to Whipple for manufacturer support and direction given I thought maybe the PCM detected an issue and reduced the output. Whipple agrees that something happened and directed me to check for any codes. With this information, I reached out to my dealer several weeks ago and just now with no progress. My gauges fluctuate much like yours in the video - which leads me to there may be a similar baseline issue or not. I will keep you posted.

 

[Guitar00Dude]

I purchased a brand new 2019 Mustang in March of this year and took it in for 500-mile complimentary oil. One week after the oil change, the first cold start of the day (2-second press of start button) the engine labored (typically starts right up) then lagged and flooded - gas smell filled the cabin while the gauges danced all over the board for about 10 - 15 seconds to include fuel pressure. After running at idle for a bit, I took it out for a 5-mile drive and the results are loss of about 1/3 of the normal power/sluggish. Ever since the occurrence, the vehicle hesitates, slow to engage, and the power band is greatly diminished. I reached out to Whipple for manufacturer support and direction given I thought maybe the PCM detected an issue and reduced the output. Whipple agrees that something happened and directed me to check for any codes. With this information, I reached out to my dealer several weeks ago and just now with no progress. My gauges fluctuate much like yours in the video - which leads me to there may be a similar baseline issue or not. I will keep you posted.

Thank you. Yes. Please keep up posted.

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