Question about 2001 Ford Focus

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Rough idle problem

On my ford focus the revs are going to 1.000 rpm when the car is started up then drops down then goes back up help please

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I had this problem on my 1.8 focus. turned out to be the idle air control valve

Posted on Mar 06, 2015

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  • 134 Answers

This could be due to a bad MAF sensor or an Oxygen sensor. Also, take your car for a compression test to make sure there are not any vacuum leaks.

Posted on May 01, 2013

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Posted on Jan 02, 2017

emissionwiz
  • 77169 Answers

SOURCE: idles rough

Check for engine vacuum leaks, most likely around the upper intake manifold arear, look for vacuum hoses that have come off or a missing vacuum port block off cap at the rear of the engine drivers side, large cap.

Posted on Nov 04, 2008

emissionwiz
  • 77169 Answers

SOURCE: Ford Focus cutting out

Here is the most common cause of surges and stalls, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Posted on Dec 03, 2008

  • 1 Answer

SOURCE: 2001 v6 escape rough idle when cold

To update my earlier repair on the 2001 6 cyl Escape: When cold, and when the ignition was turned over but no accelerator pressure given, the rough idle finally returned the P0303 code again when the check engine light came on indicating that it wasn't caused by the plugs or the coil. FYI, I had replaced the intake manifold gaskets during the original repair and just prior to that I had replaced the fuel filter which was very dirty (I cut it open to see).

The repair manual referred to fuel injectors as a possible problem. I have run three tanks of fuel using different injector cleaning products and am very pleased with the results. Cold starts are much smoother and I am unable to coax out the P0303 code or any other code.

My opinion, change the fuel filter, use a fuel injector cleaner for a couple of tanks, change the plugs if the problem still exists. The coils were not the problem on my vehicle.

Posted on Mar 09, 2009

  • 179 Answers

SOURCE: car revs up whilst stopped, idle problems

you need a new oxygen sensor

Posted on May 31, 2009

  • 532 Answers

SOURCE: My 1996 Ford F150 4.9l 5spd. rough idle, poor drivability, stall

try replacing the throttle position sensor

Posted on Oct 24, 2009

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Probly a sensor issue or idleair control motor thats worn. Get car scanned at a partstor to confirm

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Why does ford focus 2000 rev high and return to normal when I start the car?


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Rpm does not drop below 1000


No,only on carburated engines it,idles down to the set point,on yours,it's fuel injected,pushing gas pedal won't kick idle down,should go down after a certain amount of time,does it automatically,If you start and drive a 5 mile ride and stop at a stop sign,it should idle at it's set point if there's no engine problems,which may be.5 to .7 on your tac.When you normally first start,it will idle between 1000 to 1200 rpm's,don't push on gas,let idle say 15 seconds,put in drive and go.

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I have a 2003 Hyundai Tiburon Gt.When im coming to a stop and Im in neutral my car idles high.I can rev it up it drops back down to a 1,000 rpm's or where it should idle at.


Hello
The engine and transmission in this cars drivetrain are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s)

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2003 ford focus rpm runs high when clutch is engaged


since this is a standard and you need to engage the clutch which basically shifts you into neutral to shift gears, this ALMOST sounds like the idle air control valve.

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Expedition 2000 XLT. The car revs at start up to 1.2 then slowly goes down to .8 then when I start to drive RPM is down to .5 or .6 and the engine becomes rough. I went to a Car Shop and paid 1800 for a...


Actually in most cases this would tell me a a dirty/defective IAC  Idle Air Control valve , these have dropped in price to about 55 buck either that the EGR valve is sticking 

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