Power loss

Asked by Aug 02, 2018 at 03:32 AM about the 2008 Ford Fiesta

Question type: Maintenance & Repair

Car will drive fine on flat roads but when I'm going
up hills and hit 30000 rpm it will not accelerate any
more and engine light will come on when I turn the
car on and off it clears the fault until I hit a hill
again, I've had the air flow sensor replaced but still
have same issue can anyone help

1 Answer

2,095

This problem could be the Electronic Throttle Body. It has a ' Drive by Wire' system. Also let the car idle for a while and place your hand as near as the exhaust pipe outlet as possible and check if there is any pressure coming out of the exhaust pipe. The Catalytic Converter could also be blocked. There are two oxygen sensors on your vehicle, An upstream and a down stream oxygen sensor. The upstream sensor is upstream of the CAT near the exhaust manifold and the down stream is below the CAT on the exhaust pipe end. They both feed the car's compuer minute signals of between 200 and 900 mV. The upstream signals flutcuate between these voltages and the down stream keeps a contant voltage of 5 to 800 mV. If the CAT is blocked or has two much restriction the down stream sensor will fluctuate.

Your Answer:

Ford Fiesta Experts

  • #1
    Rowefast
    Reputation
    160
  • #2
    tennisshoes
    Reputation
    140
  • #3
    COMETGUY61
    Reputation
    130
View All

Used Cars for Sale

2019 Ford Fiesta For Sale
8 listings starting at $21,924
2018 Ford Fiesta For Sale
22 listings starting at $17,990
2017 Ford Fiesta For Sale
45 listings starting at $12,988
2016 Ford Fiesta For Sale
7 Great Deals out of 58 listings starting at $8,974
2015 Ford Fiesta For Sale
11 Great Deals out of 143 listings starting at $4,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.