Q: ford focus mk2 2.0 car idle rough and have no power.change.put feet on brake padel-car goes limp mode. 2005 Ford Focus

asked by on January 06, 2017

car idle rough at idle.have no power when accelerate.goes in limp mode as soon as I put my feet on brake padel.change ignition coils with no success.diagnose car with no success.

My car has 191000 miles.
My car has an automatic transmission.

Loss of power Inspection $79.99 - $99.99 Get a Quote

Hello - check first for problem codes, whether the Check Engine light is illuminated or not. The change in rough running behavior when you press the brake pedal may indicate a failed brake booster. A ruptured diaphragm in the booster would make the engine idle rough, and possibly cause other "drive-ability" issues like poor power. I would recommend a rough running inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

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

My did the scanning on my car and the scanner says that its the fuel pressure regulator.

My 2009 Dodge Ram Hemi 2500 makes a loud rumbling noise in the front end. I stop giving it gas couple times and it goes away

Hello, thank you for writing in. The noise may be coming from a number of issues with the vehicle. Considering the loss of power, you want to focus on the exhaust, air intake, and spark systems. An exhaust leak or...

My 2008 VW Touareg v8 4.2FSI is leaking oil on top of engine and running down the front of engine.

Hello. The most common leak on the front of this engine is the valve cover gaskets. They tend to leak and cause this to occur. Most of the time the engine will need to be cleaned in order to locate...

My car's Check Engine Light came on. The code is for engine knock sensor 1. Does this mean it is bad?

If your Check Engine Light came on for the knock sensor circuit then it is likely that there is an issue with the sensor. Knock sensors are designed to help protect the engine against detonation, commonly referred to as ping...

I have an issue with my Tahoe its idling rough the hand stays on 500 rpms but you can hear it in the engine

It would appear you have already attempted to perform all of the normal repairs to fix this issue. Due to the high number of repairs made, you may want to start by retracing your steps and confirming that all the...

Electric issue - 1999 Chevy S10

Hello. From what you describe it would appear that the battery or cables are having an issue. If power flows when the charger is hooked up, then that means that either the battery is dead or not making contact. I...

transmission slipping - 1997 Ford F-150

Hi. I would start by taking it in to have the transmission power flushed first as this will remove any debris from the inside of the transmission. Over time, fluid and additives lose their potency. Unlike simply draining and replacing...

AC doesn't work, compressor still works

Hello. If there is no air blowing out of the vents then the compressor is typically not the problem. It is common for the blower motor to fail and cause this as well as the blower resistor. Both of these...

Related articles

Symptoms of a Bad or Failing Speed Timing Sensor
Common signs include the transmission having difficulty shifting, Check Engine Light coming on, vehicle not starting, and loss of engine power.
How Long Does a Timing Chain Last?
A timing chain is a metal chain, as opposed to the timing belt which is made of rubber. The chain is located...
2012 Ford Fusion vs. 2012 Toyota Camry: Which Should I Buy?
While most people believe that domestic sedans just cannot compete with the Honda Accord and the Toyota Camry, the industry leaders, that is not necessarily true. Yes, there are some metrics where the Camry just excels, however the Ford Fusion...