Question about 2003 Ford Focus

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Have a 2003 ford focus. idling problem

Have a 2003 ford focus. when the car is idling and i turn on the hazards the car begins to noticeably surge. have changed both alternator and battery in past month

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  • Gil Nolasco May 11, 2010

    By surge you mean the engine speeds up? Any other things cause it to surge? Like turn signals or A/C?

  • johnmac1892 May 11, 2010

    sounds like the engine is hunting a bit. it's most noticeable when i turn on the hazards but turning on the headlines does it sometimes as well.

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  • Ford Master
  • 4,369 Answers

If you have 14 volts or more at the battery at 1000 rpms, the battery & alternator are fine. If you get the same surge when you turn the bower motor on high speed, it is just the normal load on the alternator as it puts out more current. The engine is supposed to compensate by kicking up the idle. It does this through the IAC, idle air control. You may need to clean the IAC passages and the throttle body passages. I also would clean the MAF sensor heated wires with carb cleaner or MAF sensor cleaner. The MAF is in the iar intake hose and has a 2 or 3 wire connector going to it. The heated wires are in the air stream. Then disconnect the battery for 2 hours to clear the "Keep alive memory"
It will relearn after you drive for 10 miles. May run rough for that time.
good luck.

Posted on May 11, 2010

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Posted on Jan 02, 2017

shaggyrat
  • 1224 Answers

SOURCE: Misfire and eratic idle on Ford Focus petrol 1.8i

motor mounts need replacement and sounds like your cars comp. is about to take a hit and go down
the air flow control unit sounds like it also has has a clog in it and needs to be serviced this is a big one when you get to driving at higher speeds the fan turns off and the air outside controls cooling air/fuel mixture rate sometimes too much air intake can make the vehicle act eratic

Posted on May 21, 2008

  • 1 Answer

SOURCE: 2003 ford focus ztw alternator r+r

what to do to a2003 ford focus if the alternator wire shorted out

Posted on May 08, 2009

  • 534 Answers

SOURCE: I have a 2003 ford focus. Ford staes the

Check your battery ground connections. Make sure the vehicle chassis (and alternator) is properly grounded.
Check for any loose connections around the main high current 12V supply fuses.
Check the clicking in the steering column is not a loose supply wire arcing.

Posted on Jun 20, 2009

  • 291 Answers

SOURCE: 2003 Ford Focus p1747 short solenoid error

THIS IS A COMMON CODE.. THIS IS A PRESSURE SELENOID LOCATED INSIDE THE TRANSMISSION.... SOMETIMES CALLED A SHIFT SELENOID... THERE IS A FIRST TO SECOND SHIFT SELENOID AND A SECOND TO THIRD AND A THIRD TO OVERDRIVE... THE SHORT CIRCUIT CODE CAN BE TWO THINGS.. FIRST A BAD SPOT IN WIRING HARNESS CAUSING SHORT CONDITION.. DOUBTFULL... OTHER CONDITION IS THE SELENOID ITS SELF COULD BE GOING BAD DRAWING MORE CURRENT THAN NORMAL. THIS WILL REGISTER THIS CODE....YOU HAVE TO REMOVE THE TRANSMISSION PAN TO EXSPOSE THE VALVE BODY.. THERE YOU WILL SEE SEVERAL SHIFT SELENOIDS...WHEN YOU PURCHASE THE REPLACEMENT IT WILL GIVE YOU A GOOD IDEA WHAT TO LOOK FOR....THEY JUST PLUG IN AND 1 OR 2 SCREWS HOLD THEM IN.... LET ME KNOW IF MORE HELP NEEDED

Posted on Sep 01, 2009

honeymokey
  • 3113 Answers

SOURCE: Our 2001 ford focus when it idles it surges

Check the pcv hose for leaks at the intake manifold. Common problem.

Posted on Jan 23, 2010

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1 Answer

2003 Ford Focus ZXT


Oxygen sensors do go bad, but having the code there doesn't necessarily mean a bad sensor.

In your case P2195 means your front oxygen sensor (on the exhaust manifold) read a lean mixture for more than 25 seconds on 2 consecutive drive cycles (2 times you turned your engine on, then off).

Ford does have a service bulletin out for that code and the code usually indicates you have a vacuum leak somewhere around the engine.

If your car drives well, I wouldn't worry about it right now. It's not a condition that will leave you stranded in any way, the worst that can happen is decreased fuel mileage.

I'd run the car for a while and see if the light comes back on, and if it does, how often. It may never light up again. If it does light up, and/or if you notice any increased fuel consumption, erratic idle (engine feels like it wants to stall at idle), or any other driveability issue, i'd start by looking for a vacuum leak before anything else...

Other possible causes could be
-Bad Oxygen sensor (possible, but i wouldn't jump to this)
-Bad injector(s) (unlikely, you'd probably notice in the way the engine runs)
-Fuel pressure issues (you'd notice this too)
-Bad engine computer (very unlikely)

A vacuum leak can a lot of times be pin pointed easily:
Start the engine and let it idle. Get a propane torch (the kind used to solder plumbing pipes) and open the gas valve slightly (without lighting the torch). Pass the torch around vacuum lines and connections (they run from the intake/throttle body to the transmission, brake booster, PCV valve etc...) When the torch comes around where the leak is, the engine speed will increase noticeably.

There are pumps available to check for this but I find this method to be quite easier, cheaper and more reliable.

Aug 28, 2008 | 2003 Ford Focus

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