Why does my 2004 Ford Focus die at idle?

My 2004 Ford Focus is running very rough and dies at an idle The coil pack has been changed and it has had a tune up. Could it be the EGR or mass air sensor Submitted:11 years ago. Category: Ford Show More Show Less Ask Your Own Ford Question Share this conversation Answered in 2 hours by: .

Why does my focus engine shake at idle?

About 2 weeks ago my idle has gone to crap, the rpms will dip very very low when at idle and my engine literally shakes because of it and will stale at times. If i apply a bit of throttle it will smooth out and run ok..

How to test idle speed on a focus?

You can disconnect the electrical connector on the IACV (Idle Air Control Valve) to see if it makes a difference to the idle speed as a crude, preliminary test to see if that part is malfunctioning. The IACV is a computer controlled throttle bypass opening that is used to set idle speed.

What causes stalling and poor idling on a focus?

The most common cause of stalling and poor idling, as has already been stated, are vacuum leaks and the PCV hose is a common source on the Focus. The SPI engine, as whynot mentioned, needs some special attention as well.

Why does my Ford Focus run at idle?

When a Ford Focus exhibits problems with running roughly at idle speeds, auto mechanics generally look first to either a vacuum problem, or more often, a problem with water getting into the Differential Pressure Feedback Sensor (DPFE), a part of the EGR (exhaust gas recirculation system).

Why does my Ford Focus fail emissions test?

If you live in a state with vehicle emissions testing, this may be the reason why your car fails the test. With the Ford Focus in particular, the problem may be caused by water getting into the DPFE sensor, interfering with its ability to accurately gauge pressure changes in the EGR system.

What does dpfe stand for in Ford Focus?

One of these components EGR’s differential pressure feedback sensor, commonly known as the DPFE. When the pressure feedback senses that pressure is low, it opens the EGR valve to increase the flow of recirculating exhaust gases, and shuts down the flow when it senses that pressure is high.

How big is the solenoid on a Ford Focus?

Cut vertically upward from the bottom along each of the two vertical lines, stopping at the line drawn horizontally. Fold the section of insulation upward. With the insulation held up, reinstall the EVR solenoid. Tighten to 36 +/- 6 lb.-in. (4.1 +/- 0.7 N.m)

Why does my Ford Focus not turn on?

SOMETIMES RUN GOOD BUT WHEN I START SLOWING DOWN OR STOPPING REFUSES TO TURN ON AGAIN. SEVERAL MECHANICS …

What’s the idle RPM on a Ford Focus?

With the engine warm, stationary idle (car not moving) is 700-750 rpm. If the car is in motion, the rev’s will only drop to 1500 at the lowest, until the vehicle speed is 15 mph or less, which is fine. I still have 1 problem though, and it has to do with the Air Conditioning affecting engine behavior.

What causes an Audi A4 to idle rough?

A super lean running engine will often idle rough. The fuel injection systems job is to atomize the fuel into fine mist. If a fuel injector has an issue with this process, it will either let too much or too little fuel into the combustion chamber relative to the amount of air.

Why are the spark plugs on my Ford Focus not working?

Spark Plugs – One of the absolute most common causes (if not the most common reason that your Focus may be misfiring) is the spark plugs. Although most modern vehicles use iridium spark plugs, they still need to be changed at the manufacturers recommended interval.

What happens when a 2004 Ford Focus dies?

My 2004 Ford Focus is running very rough and dies at an idle The coil pack has been changed and it has had a tune up. My 2004 Ford Focus is running very rough and dies at an idle The coil pack has been changed and it has had a tune up. – Answered by a verified Ford Mechanic

Why does my Ford Focus keep leaking fuel?

They could chafe against the rear wheelarch liners causing a failure. Ford should have fixed this for free, so make sure the work has been carried out. Cars built between July 2004 and February 2005 could have had problems with their fuel return pipes leaking. The pipes were made from material that degraded over time, allowing fuel to seep out.

Why did my Ford Focus catch on fire?

Ford Focus models built between June 1998 and March 1999 might have alternator problems. There was a possibility that the alternators could develop a short circuit, overheat and cause a fire. Some cars built between September and November 1998 might have had problems with their door latches.

What are the O2 sensors on a Ford Focus?

The oxygen sensors that are equipped in your Ford Focus are responsible for monitoring the exhaust to help the ECU determine the correct air/fuel mixture. Of all the sensors equipped in your vehicle, the O2 sensors may have it the hardest. They deal with super hot exhaust that can cover them in deposits that can leave them ineffective.

SOMETIMES RUN GOOD BUT WHEN I START SLOWING DOWN OR STOPPING REFUSES TO TURN ON AGAIN. SEVERAL MECHANICS …

What causes an oxygen sensor to go bad?

They deal with super hot exhaust that can cover them in deposits that can leave them ineffective. The heat of the exhaust can also bake the wiring going to/from them over time. If an oxygen sensor goes bad, it can make your Focus run too lean (or rich). A super lean running engine will often idle rough.

What causes an O2 sensor to malfunction?

Oxygen (O2) or A/F ratio sensor or sensor heater malfunction Open or short in O2 sensor circuit (wiring, harness) Fuel pressure or fuel injector problem Intake air or engine vacuum leaks Fuel pressure too high or too low Air suction in air intake system

What causes the p2195 Ford oxygen sensor to be faulty?

P2195 FORD Possible Causes Faulty Front Heated Oxygen Sensor Bank 1 Front Heated Oxygen Sensor Bank 1 harness is open or shorted Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection Inappropriate fuel pressure Faulty fuel injectors Intake air leaks may be faulty

Why does my 2004 Ford Focus die at idle?