Q: Fiesta mk7 zetecs power problem

asked by on September 03, 2016

Hi I'm having a problem with my petrol zetecs s 58 plate where when I'm driving the car normally it will all of a sudden loss power even when my foot is half way to the floor and feel like it breaking so I take it out of gear give it a rev then it's back to normal. I changed my spark plugs and air filter but it seems to be getting worse, I was wondering could it be either the coil pack or leads or the MAF sensor. I also got told it could be the fuel filter getting blocked. Also the average speed reader on the trip meter doesn't work

Ignition Coil Replacement $132.12 - $587.62 Get a Quote
Mass Airflow Sensor Replacement $188.36 - $786.53 Get a Quote
Fuel Pump Replacement $145.32 - $1299.70 Get a Quote
Fuel Filter Replacement $98.50 - $325.56 Get a Quote
Brake System Inspection $94.99 - $114.99 Get a Quote

If your vehicle is losing power, I would recommend having an engine diagnostic performed by a qualified mechanic. This inspection would run several tests including a scan of your vehicle for trouble codes and going from there depending on what codes may have been stored in your vehicle’s PCM (powertrain control module). If the problem happens all the time, it is possible that you may have an ignition coil or MAF sensor issue.

If the problem happens intermittently, you may have a fuel issue such as a fuel pump going bad or a clogged fuel filter just like you suggested. Since it is likely that you have a trouble code stored due to this issue, the code(s) will give a better indication of which system of your vehicle is causing this loss of power issue you are having.

I also want to mention that if you said it feels like the vehicle is braking while you are driving it, I would recommend having your brakes inspected as well. Sometimes your brake calipers can get stuck causing them to constantly be applying the brakes which can cause the vehicle to brake even when the brake pedal is not depressed. Finally, the average speed meter not working is likely unrelated to the loss of power issue you are having. I would recommend checking in your owners manual to see if there is a way to reset it. For a complete inspection of the car, consider having a professional, like one from YourMechanic, diagnose your car in order to have the correct repairs made.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Car not cranking or starting.
This vehicle has a starter relay that is mounted in the main fuse box inside the car. This is most likely the cause of the no crank condition you are having. I recommend you have the relay inspected (https://www.yourmechanic.com/services/car-is-not-starting-inspection) by...
Car doesn't always start.
Hi there! Your I am not able to give you a definitive answer without inspecting the car. However, a malfunctioning anti-theft system is sure to cause a no-start condition. In this instance, the key is turned and the dashboard lighting...
Clutch pedal going soft after you bleed it. Has s new clutch and a auto shop says it's the master cylinder
Hello. If the clutch pedal is going soft even after it is bled, then that is an indicator that there is either a problem with the master cylinder (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-clutch-master-cylinder) or the slave cylinder (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-clutch-slave-cylinder). If the seals inside the master...
I have checked the oil level and the oil level on the dipstick is far over 'maximum'. Should I carry out a full service?
You should find out the reason the oil is overfull. If the oil is contaminated with water then you may have a head gasket blown. If the oil is contaminated with fuel then you may have a fuel injection system...
oil light on. Will not start.
The low oil level and knocking noise may be very likely related in that this may have caused a number of things to fail such as crankshaft bearings or rod bearings. Depending on the severity of this, it may have...
Check Engine Light is on - trouble code P0420
As you may know, trouble code P0420 (https://www.yourmechanic.com/article/p0420-obd-ii-trouble-code-catalyst-system-efficiency-below-threshold-bank-1-by-jamahl-walker) relates to the inefficiency of the catalyst system, which detects the presence of oxygen in the exhaust gases. This can be caused by failing O2 sensors that need to be replaced. This...
Where is the heater fan blower motor relay located? 2003 Chevy Silverado 1500
Hello - the blower fan relay (https://www.yourmechanic.com/services/blower-motor-relay-replacement) is located behind the glove box - small black plastic square. Make sure both fuses for the HVAC/heater are good, and have power to them (one is 10 amp, one is 30 amp)....
Theres is a battery sign on dashboard and my steering wheel is hard ti turn especially in reverse
Hello There, This is a commonly known problem in the Fiats. Your car has a power steering system that is electrically powered which is why the steering becomes difficult when the battery is not charging properly. As the system voltage...
2007 Dodge caravan won't start
Hello, thank you for writing in. This is a great question. The battery is solely responsible for starting the vehicle. This is assuming your connections and wires are clean, dry, and tight. Once the battery starts the vehicle, the alternator...

Related articles

Symptoms of a Bad or Failing ABS Speed Sensor
Common signs include the ABS Light coming on, decreased stopping time, and less stability under icy or wet driving conditions.
How to Replace an Ambient Temperature Sensor
The ambient temperature sensor monitors the car's temperature inside and out. This sensor allows the AC to maintain comfortable cabin temperatures.
Top 10 Best-Selling Cars of 2016
Ford F-series pickup trucks, Toyota Camry, and Honda Civic are some of the best-selling cars of 2016 and all deliver on reliability and efficiency.