Code P0191: Ford Escape 2008 V6 loss acceleration power on motion and check engine sign is on

Tiny
MAVIS AYORINDE OLORUNLEKE
  • MEMBER
  • 2008 FORD ESCAPE
  • 3.0L
  • V6
  • FWD
  • AUTOMATIC
  • 121,500 MILES
Hello all, please I have similar problem but in different form. I bought my car last year at 107km miles, but presently with 120km miles. Recently I was declining from hill when I suddenly lose power on my accelerator and "check engine sign" showed in yellow on my dashboard with oil an battery indicator in Red. I put of the ignition and restart, to drive it home, but the check engine sign remain on the dashboard. After diagnostic scan code P0191 Fuel rail pressure sensor circuit/performance was shown and it was changes. After one week of using, it came up while was on highway at 120km. I was able to manage it back to the mechanic. And a routine service was carried on it. He advice I drive it for a complete cycle to see it will happen again. 3 days after, its occur again (i.E the engine lose power, that accelerator was ineffective and check engine sign came up) while my wife was driving BUT this time when she put it off and re-start the engine, lo there was no check engine sign again. But has anyone experience such issues on his SUV either tribute or Mazda of same model. What did you change apart from Fuel Rail Pressure Sensor? It happens again on Saturday, the check engine sign came up and engine short-off. Several attempt to restart was going of intermittently. I had to let it rest some few minute before its start. I drove it again to my mechanic and this time we planned to check fuel pump and filter. Has anyone experience this issue before? Thanks for feedback.
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Monday, March 20th, 2017 AT 3:30 AM

6 Replies

Tiny
HMAC300
  • EXPERT
See pic for most common causes , but this may be more in the fuel pressure range being low so check pressure with a gauge auto parts rent it see link. or have your mechanic do it. but its pretty easy.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator see pic on causes as well pic will be in another answer
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Monday, March 20th, 2017 AT 6:51 AM
Tiny
HMAC300
  • EXPERT
Here is pic
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Monday, March 20th, 2017 AT 6:53 AM
Tiny
MAVIS AYORINDE OLORUNLEKE
  • MEMBER
Hello, We have checked with my mechanic as I didnt have a gauge to test the pump pressure but he said it was my pump that need to be changed and fuel filter. Another person said its the accelerator pedal and throttle unit which is ridiculously expensive. We haven't open the fuel pump unit yet.
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Wednesday, March 22nd, 2017 AT 1:07 AM
Tiny
HMAC300
  • EXPERT
It comes down to whom are you going to believe your mechanic or another person. Low fuel pressure will cause your problem. If yo have ever run the car out of fuel then i'd go with the pump because the pump gets it lube from the fuel.
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Wednesday, March 22nd, 2017 AT 6:41 AM
Tiny
MAVIS AYORINDE OLORUNLEKE
  • MEMBER
I took it to my a mechanic and the fuel pump, fuel filter And air filter was change. From observation, all of it look rusty and the filter on the fuel pump is seriously clogged with brownish particle that may seal when the vehicle tank is pressurized.
I have being testing it since yesterday with AC most of the time. Till Saturday before I can ascertain if its being resolve or not after a long hour drive. However, fuel consumption is still an issue here. How can I maximize millage on my fuel? Any idea?
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Wednesday, March 29th, 2017 AT 10:30 AM
Tiny
HMAC300
  • EXPERT
I assume that it runs ok then after pump/filter changes. Fuel mileage depends on a lot of things how hard you drive, 4wd etc. Not knowing your driving habits I can't really say other than if everything is ok then just drive with a light of throttle as you can
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Wednesday, March 29th, 2017 AT 12:07 PM

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