Shifting_Gears
Well-Known Member
- Joined
- Sep 13, 2018
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- Location
- South Florida
- Vehicle(s)
- 2016 Mustang GT
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- #1
Hopefully this will save time and a headache for those of you that get this problem.
I started experiencing a lower RPM misfire which was most prominent off of idle to 3k rpm. I would get an intermittent CEL which would produce a P0300 or P0308 code (random misfire or Cyl 8 misfire).
The misfire was constant until higher RPM and it smoothed out. The car had full power WOT but felt a little off down low.
Took it to the dealer and they confirmed my suspicions, it was a broken actuator rod on the intake manifold assembly. So one bank of IMRC’s was stuck closed and the other functioning. The entire assembly was replaced under warranty.
They ran an ignition, injector, fuel pump and compression tests all of which were fine. There are other threads about this occurring with the 15-17 cars. Not sure about 18+ but it seems to be picking up for the 15-17 models as age and mileage increase. My car is a ‘16 and this happened just short of 8k.
Hope this helps!
I started experiencing a lower RPM misfire which was most prominent off of idle to 3k rpm. I would get an intermittent CEL which would produce a P0300 or P0308 code (random misfire or Cyl 8 misfire).
The misfire was constant until higher RPM and it smoothed out. The car had full power WOT but felt a little off down low.
Took it to the dealer and they confirmed my suspicions, it was a broken actuator rod on the intake manifold assembly. So one bank of IMRC’s was stuck closed and the other functioning. The entire assembly was replaced under warranty.
They ran an ignition, injector, fuel pump and compression tests all of which were fine. There are other threads about this occurring with the 15-17 cars. Not sure about 18+ but it seems to be picking up for the 15-17 models as age and mileage increase. My car is a ‘16 and this happened just short of 8k.
Hope this helps!
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