Hesitation under load

Tiny
SACREDCOWBBQ
  • MEMBER
  • 1997 LINCOLN TOWN CAR
  • V8
  • 2WD
  • AUTOMATIC
  • 190,000 MILES
After fueling, I was driving 70 mph. Going uphill, I lost power. It dropped down to 38 mph. I stopped and got SeaFoam. Same issue afterwards. I eventually would take my foot off the gas for ten seconds, then it would accelerate normally again.

Since I have had this car, it has always had a whine when I have my foot on the gas, which I assume is the fuel pump. It stops whining when I have my foot off the pedal.

Any thoughts? Just replaced the thermostat. Aside from the whine, it has always been reliable.
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Friday, October 5th, 2018 AT 2:13 PM

3 Replies

Tiny
DL AUTOSHOP
  • MEMBER
Hello, I am Danny.

I have two things that come to mind. It is possible your fuel pump may be failing/worn and not having sufficient pressure. Or 2, your catalytic converters may be plugged. I would suggest performing a fuel pump pressure test first. If you do not have a tester your local auto parts stores have a tool loaner program and will rent you one. I have attached a tutorial showing you how to do it. With the key on and engine off the pressure should be 30-45 P.S.I. As far as the catalytic converters you would need to go to a muffler/exhaust shop and have them tested to see if they're plugged. I have attached a tutorial for that as well. Hope this all helps and let us know if you have any other questions. Thanks for using 2CarPros.
Danny-

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter
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Saturday, October 6th, 2018 AT 7:36 PM
Tiny
SACREDCOWBBQ
  • MEMBER
Awesome! Thank you so much, Danny. I will get right on this.
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Saturday, October 6th, 2018 AT 7:40 PM
Tiny
DL AUTOSHOP
  • MEMBER
Okay,
I will recheck your heater code. What was the symptom? Thanks again for using 2CarPros.
Danny-
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Saturday, October 6th, 2018 AT 10:22 PM

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