hesitation

  1. G

    '15 hesitation while driving

    I have a 2015 XLT with about 177K on it. While driving, it seems to be missing sometimes. It does it at different speeds and Not during gear chenges. It feels like a traditional slipping torque converter, but like I said, it doesn't necessarily do it during gear changes, but just driving... What...
  2. A

    Does your Expy burn LOTS of oil??

    We have had too many issues for a brand new vehicle (2019 Expy MAX), IMO. I posted in March 2020 @ 6K miles about the timing chain, axle seal leak, & pinion seal problems that apparently were causing the hesitation/lag issues I was experiencing (see previous post for more details). Well, the...
  3. J

    Replaced Fuel Pump - Immediate whining noise from Tank and hesitation

    HI all, 2002 Expedition 5.4L. I just replaced the Fuel Pump with a new Delphi fuel pump assembly. It went relatively smooth with the exception of a couple electrical connectors were difficult to disconnect. Steps to replace fuel pump. 1. Disconnected battery 2. Disconnect filler neck hose and...
  4. J

    Replaced Fuel Pump - Immediate whining noise from Tank and hesitation

    HI all, 2002 Expedition 5.4L. I just replaced the Fuel Pump with a new Delphi fuel pump assembly. It went relatively smooth with the exception of a couple electrical connectors were difficult to disconnect. Steps to replace fuel pump. 1. Disconnected battery 2. Disconnect filler neck...
  5. O

    Help with low power

    Hello all. 2010 Navigator 5.4 3v with 186,000 miles. I recently noticed a significant decrease in power between about 1800 and 3000 rpms. The power picks up above that. It surged very bad when it started but is much smoother now after what's listed below, but still no power in that rpm range...
  6. Matticus

    Lunge/hesitation at low RPM caused by TPS?

    I had the motor swapped in my 2012 expy about 6 months ago. Shortly after the swap, I've noticed a sort of "lunge" and also hesitation when accelerating with light throttle from a stop through at least the first three gears - always between ~1300 - ~1700 rpm. I'll lightly press the throttle to...

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