I propose to work together to collect all currently available information in one note. I’ll start, and you correct me, complete me and, I hope, we will get an algorithm for solving most cases.
0. Deal with obvious symptoms, if any. For example:
0.1 Check Engine light is on Error codes / Check Engine / Engine fault light. (R)
0.2 Speedometer needle jumps: Abnormal behavior of instrument needles, most likely a malfunction of the speed sensor. (R)
1. Insufficient pressure in the fuel rail.
Automatic transmission: problems when switching on kickdown, freezing speed when switching. Long time switching gearbox.
Diagnostic methods: measure the pressure in the fuel line, ramp. (R)
Possible reasons:
1.1 Fuel pump screens are clogged: Clean the fuel pump screens. (R)
1.2 The fuel pump is out of order or cannot produce the required pressure: Replace or repair the fuel pump. (R)
1.3 The fuel system is not sealed, incl. through the fuel pressure regulator.
Useful tips: it is recommended to cut out: The hatch for access to the fuel pump from the passenger compartment. (R)
2. Problems in the ignition system.
Symptoms: the whole set (does not pull/stalls/shuts up.)
Diagnostic methods: cracks on the ignition coil, check in a dark room for sparks in high-voltage wires, at the connection points with spark plugs and coil,
Possible reasons:
2.1 Ignition coil. (R)
2.2 Spark plugs. (R)
2.3 High-voltage wires. (R)
Example of faulty wires: Engine does not pull/stalls/shuts up. (P) (message #17233164)
10. Air leak in the intake manifold Requires additional verification!
Symptoms: shutting up
Description:
Diagnostic methods:
described in the first message of the profile topic: Intake manifold, problems, air leaks.
Solution methods: replace the intake manifold gasket.
11. The timing belt has jumped: The engine does not pull/stalls/shuts up. (P) (post #14421629)
Primary symptoms:
Ford Focus 2 stalls immediately after starting the engine: the main reasons for the problem
Ford Focus 2 is no longer produced today, which means that owners of this car may encounter a variety of defects. If this is some minor breakdown that does not affect driving, then you can continue to operate the car. But what to do if the problem is more severe. The reason for the noise of the dual mass flywheel on the Ford Focus 2.0. Replacement of dual mass. For example, Ford Fox 2 starts and immediately stalls, what is the reason? By the way, this is a fairly common malfunction that can happen under completely different circumstances.
We will talk further about the main and more common reasons. Quite often the problem may lie in the throttle valve. First you need to check the throttle position sensor. If everything is fine with it, there may be a problem with the contacts or connectors that need to be thoroughly cleaned. By the way, poor engine performance may be due to a clogged damper. It can also be cleaned and the normal state of the motor will be restored.
Main reasons
Another reason for the disgusting start-up of the unit may lie in the spark plugs. How to remove the rear drum bearing is the same as on the Ford Focus 2nd and 3rd generation. Check their condition. There are 1 valves for a Ford Focus and it just consumes 500 grams of oil, what should I do? In the service. Of course, in case of dilemmas with spark plugs, the engine most likely will not start at all due to lack or excess fuel supply. Ford Focus 1 accelerator stalls Ford Focus 1 conclusions after a month of ownership. Door handle lock repair kit for Ford Focus 2. Detailed information about spare parts for Ford. Focus your attention on the catalyst. If it is clogged and unable to perform its function normally, the engine may stall after starting. The problem is that the escape of gases is difficult. Connecting the aux connector to a Ford Focus 3. The malfunction is eliminated by replacing the catalyst or dismantling it.
So, you are faced with the problem that after starting the engine, it immediately stalls. In general, the second Focus is a reliable and unpretentious car, but time takes its toll.
Fortunately, experienced owners of this model share information, and we were able to identify 2 main malfunctions that can cause unstable operation of the power unit:
Read also:
Starts and stalls. White smoke. Ford Focus Diesel 1.8
The engine starts and stalls. The client visited several services. In the end, no one could find anything
Ford Focus 1 stalls
Result!!! Poor contact at the ignition coil connector! I don’t press the accelerator, everything is at XX.
Read also:
- regulator idle move;
- injector.
It is because of the idle speed regulator that a similar situation can occur when the engine constantly stalls. How can you be sure that this is the problem? A simple and quick diagnosis will help clarify the problem and help you understand that you need to look for something else. What kind of light bulbs are on Ford Focus 3? (Solved). To diagnose, you need to perform the following steps:
- warm up the engine to operating temperature and drive for some time;
- stops, turn off the car and try to start the engine again;
- If the engine starts and stalls, then we have identified the problem.
By the way, the same trouble can occur when starting a cold engine for the first time. Ford Focus 1 stalls: at idle, at. It may start but then stall. Moreover, even if the engine continues to run, the idle speed will float and stabilize only after gas operation.
A sign of a breakdown of the idle speed control is also the engine starting only after pressing the accelerator pedal. Then it stalls. Focus 2001 Zetek 1.8. And this is a problem in cold weather. I have focus. When the pedal is released, the engine can stall. Please note that failure of this part may be accompanied by other symptoms. For example, when stopping at a traffic light, the car may stall for no reason. Then the engine starts and everything is fine.
Summarizing
As we were able to find out, unstable engine operation on the second Focus can have many reasons. In some cases, it is quite difficult to identify them, while sometimes the problem can be solved very simply - by restarting the system, removing and replacing wires, etc.
Of course, you can pay attention to all sorts of breakdowns and try to fix them on your own. If this does not bring any results, then it is best to contact professionals who can diagnose and fix the problem.
During the service life, various emergency situations may arise. It's good when the problem is obvious. But it happens when one or another symptom may indicate several problems at once. Such manifestations on Ford Focus 1 include a stalling engine, for example, at idle, when moving slowly or braking. Naturally, this is a problem not only with the Focus, but with any car.
By collecting and analyzing the many years of experience of FordFocus owners, we can identify a number of problems that such a symptom may indicate. Usually it manifests itself in conjunction with the fact that the car does not start, power is lost, etc.
Problems that a stalling engine may indicate
When the Ford Focus engine stalls, you can assume from the experience of other car owners and craftsmen that in the car:
- Problems with fuel pressure.
- Problems with the ignition system.
- Faulty idle air control valve.
- Air leaks through crankcase ventilation hoses.
- Throttle position sensor failure.
- Incorrect operation of the mass air flow sensor.
- Adsorber malfunction.
- Wiring problems.
- The timing belt has jumped.
The list of problems is, of course, not exhaustive. The symptom when the engine stalls can confidently be called universal, since it can be caused by many completely different problems.
Fuel pressure problems
Insufficient pressure in the fuel rail causes a wide range of symptoms: no traction, the engine stalls at idle, and “shuts up” when driving. To diagnose a potential malfunction, it is recommended to measure the pressure in the fuel line and determine the reasons for possible deviations from the norm. You need to measure it with the fuel pump and pressure regulator on the fuel rail, since this is where the pressure of the entire system is created.
Possible reasons:
- Fuel pump strainer is clogged. Cleaning the unit will help solve the problem.
- Failure of the fuel pump, as a result of which the required fuel pressure cannot be pumped into the system. The situation will be corrected by replacing or repairing the pump.
- Problems with system tightness, including through the fuel pressure regulator. The way to fix the problem is to ensure tightness by eliminating places through which pressure is lost.
Ignition system problems
Incorrect ignition operation can cause a number of different manifestations, including:
- The engine will not start;
- stalls at idle;
- craving disappears;
- and so on.
To identify an ignition problem, it is necessary to conduct a thorough inspection of the system elements. Obviously, the engine does not start or stalls for this reason if cracks are detected on the ignition coil, as well as sparks on the high-voltage wires at the junction with the coil and spark plugs.
The causes of ignition failures, due to which the engine on a Ford Focus stalls at idle or slow speed, and does not start, may be a malfunction of the ignition coil, spark plugs, or wires. The solution to the problem is to repair or replace faulty components.
Faulty idle air control valve
It manifests itself in the fact that the Ford Focus stalls at idle, at slow speeds, or immediately after starting. Diagnosing the problem involves checking the condition of the idle air control valve. Repair - flushing the unit with carburetor cleaner.
Air leak through crankcase ventilation hoses
The Ford Focus engine stalls if through the crankcase ventilation hoses and the hose that connects the intake pipe and the vacuum brake booster. To fix the problem, you need to tighten the clamps that secure the parts, as well as replace damaged or worn hoses. After this, the car starts normally and the symptoms disappear.
Throttle position sensor failure
Diagnostics of the unit is carried out by measuring the resistance on the Ford Focus throttle position sensor through the connector at the fuel rail (under the hood, in the far left corner near the tanks). The solution to the problem is replacing the throttle assembly or cleaning (washing) the throttle valve.
Incorrect operation of the mass air flow sensor
The problem is also characterized by universal symptoms. That is, the Ford Focus engine stalls and power drops. The fault is diagnosed using the on-board computer. Intake manifold air temperature data must be adequate.
Canister malfunction
It manifests itself in the fact that the engine in a Ford Focus stalls when braking and idling. This happens especially often in traffic jams, when braking, at idle or at slow speeds. The car starts normally, but after a while in traffic jam mode it stalls again.
The malfunction can be diagnosed by turning off the canister purge valve. If after disconnecting the problem the problem disappeared, then the problem was in the adsorber. Another way to fix the breakdown is to replace the valve.
Experienced Ford Focus owners who have encountered the problem described claim that after turning off the valve, throttle response and gas pedal response improve, the engine starts normally when hot, and does not stall when braking, at low speeds or at idle.
Timing belt jumped
The main symptoms of the malfunction are that the engine stalls, the Ford Focus accelerates poorly, the engine stalls at slow speeds and when braking, the power drops, the car starts poorly when hot or does not start. This set of manifestations may indicate that the timing belt has slipped. This causes a violation of the valve timing, which leads to the problems described above.
Thus, as you can see, the engine of your Ford Focus stalls, as a rule, when braking, idling or when driving slowly, for a number of completely different reasons. To determine the possible reason for this behavior of the mechanism, it is recommended to do it yourself or with the help of a specialist:
- check the pressure in the fuel rail;
- check the operating temperature of the engine, as well as the air in the intake manifold;
- throttle position sensor resistance;
- the tightness of the clamps on the crankcase ventilation hoses.
Even if this set of diagnostic measures cannot unambiguously answer the question: why the engine of your Ford Focus stalls, it will help eliminate a number of possible problems.
