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Category: Ford
Satisfied Customers: 26081
Experience:  ASE CERTIFIED TECHNICIAN ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
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09 ford focus 2.0l has no codes showing. It idles rough and

Customer Question

09 ford focus 2.0l has no codes showing. It idles rough and power surged when using accessories such as brakes lights radio heater and Windows.... when you use them it all seems to draw excessive power. Hooked up ODB2 reader and still no codes show but shows that it is drawing more power then it normally should and coolant is running at 77-78º.
JA: Have you checked the brake fluid? How's the level and when was it last changed?
Customer: Front brakes were just done fluids clean and topped
JA: Are you fixing your Focus yourself? What have you tried so far?
Customer: Yes oil and filter change
JA: Anything else you want the mechanic to know before I connect you?
Customer: The transmition also slips slightly turning corners and at a highway speed. And a humming noise from the front end
Submitted: 8 months ago.
Category: Ford
Expert:  AMEDEE replied 8 months ago.

Hello and welcome!

My name is ***** ***** I can assist you with your question.

Expert:  AMEDEE replied 8 months ago.

There are a few things that can cause this rough idle condition. I will list the most common for you.

The most common cause for this condition is a faulty mass air flow sensor, air or vacuum leak or faulty engine/motor mounts. Ford has a TSB for this condition caused by a faulty "dog bone" or motor mount. It is TSB 11-3-24.

Expert:  AMEDEE replied 8 months ago.

Another possible cause would be incorrect camshaft timing or a loose timing chain which can and will affect the engine idle. I would check engine vacuum to ensure is is nice and smooth and withing specifications. Also, dont forget about the spark plugs and ignition coils as they can cause the engine to misfire if they go bad. I have even seen these cause misfires without even setting a trouble codes in the computer.

Expert:  AMEDEE replied 8 months ago.

I am glad I can help!

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