(low Idle) 2007 Ford Focus SE

K TAYLOR

MEMBER
2007 FORD FOCUS
4 CYL
FWD
AUTOMATIC
72,000 MILES

1. Starts normal with normal (Idle, But while driving and after engine warms up, the first time you step on the brake or slow down the (Idel drops) to where you can't harly hear the engine run. The engine has never stalled or stop, but the idle is not normal.
2. Changed the fuel filter, as well as spark plugs, the air fillter seems good, but did get a check engine lite with all fluid levels OK. Reset Computer by disconeting and reconecting the ground from the battery. The lite has never came back on.

5 Replies

WRENCHTECH

MECHANIC
20,757 POSTS

Why do you think it's not normal? Do you know what the actual RPM is?

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Saturday, January 22nd, 2011 AT 11:48 PM

K TAYLOR

MEMBER
3 POSTS

When the lights are on they also dim when the idel drops. I don, t have a way of gauging the RPM, but I'm burning between 80-10 in gas and am thinking of Upgrading the octane untell I can figer out whether it's a Duct Cleaning, 02 Sensor, Oxygen Sensor, A Speed Sensor or Idle Control Valve. Wish I hadn't reset the computer.

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Sunday, January 23rd, 2011 AT 12:36 AM

WRENCHTECH

MECHANIC
20,757 POSTS

You're over thinking this. It does not sound like a problem. The PCM controls the idles speed and the goal is the lowest possible "stable" idle. If it's not stalling, don't worry about it. The lights dimming is normal too.

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Sunday, January 23rd, 2011 AT 12:49 AM

K TAYLOR

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So let me ask this one last quistion. If we have low idel to the point of stalling or stalling in your best opinion what would you look at most obvious as the cause lease to last? Thank You For your Help. K Taylor

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Sunday, January 23rd, 2011 AT 1:05 AM

WRENCHTECH