What to do if the engine starts to stall
8-valve injection engine VAZ 2114
In order to determine why the engine in a VAZ 2114 is misfiring, you must follow the recommendations of professionals. First of all, you need to determine which cylinder is out of order, for this you need to:
- open the hood with the engine running;
- remember the sound and nature of the operation of the power plant;
- remove the high-voltage wires from the spark plugs one by one, if the sound and rhythm of operation changes, then continue further, as soon as it is discovered that when the spark plug is de-energized, the nature of the sound does not change, which means the faulty cylinder has been identified.
Next, you need to unscrew the spark plug and determine its condition and performance.
It is unscrewed using a special spark plug wrench, which is recommended to be carried with you in an emergency kit. It takes up little space, but is a unique key that cannot be replaced and can come in handy at the most unexpected time. After all, even simply by replacing a heavily carbonated spark plug with a new one, you can temporarily solve the problem with starting the engine.
The next step is to determine the condition of the removed spark plug. If the electrode is intact and clean, and there is a large amount of soot on the head, then with a high degree of probability it can be determined that dust has entered the combustion chamber of the cylinder, therefore the fault must be looked for in the air supply system through the air filter.
If the entire head, along with the electrode, is covered in smoke, and it is severely burnt out, it means that a lean mixture was supplied and detonation combustion occurred with ignition advance. When the head is also completely covered with smoke and the electrode is in good condition, this means that a rich mixture was supplied and there was a delay in the ignition supply.
Assessing the condition of the spark plug gives direction in finding the true cause of cylinder failure. However, you should also check the performance of the candle itself. There is a proven method for this - “by spark”. If a spark breaks through, even if weak due to carbon deposits, then you must definitely look further. But if there is no spark at all, then you should replace the spark plug with a new one and check it. If there is a good spark, you can try to start the car and monitor the dynamics of changes.
Spark plug faults
If the car has a fairly high mileage, then trying to find the reason why the engine is shaking, you must do the following:
- change the spark plug;
- change the set of high-voltage wires; during prolonged operation under conditions of high temperatures and voltages, microcracks appear on the shell, leading to breakdowns and failure; experienced auto electricians recommend periodically changing this set for prevention;
- measure the compression in the idle cylinder; if it is broken, then perhaps the rings are stuck or the valves are burnt out;
- adjust the valves, this procedure should be carried out for prevention every 15 - 20 thousand kilometers;
- determine the performance of the ignition coil, this is a fairly common failure, the best solution is to replace the old one with a new one;
- change the air filter;
- Check that the timing belt is installed correctly.
All the specified procedures have been completed, but the engine still “troubles”. We need to move on:
- Conduct diagnostics of the electronic control unit and replace if necessary.
- Check the fuel supply system, down to the injectors.
- Determine the performance of the oxygen sensor, if it is faulty or produces deteriorated indicators - repair or replace.
- The failure of the crankshaft position sensor is determined by the computer, and an error should be generated indicating a breakdown. If this happens, replace it.
Spark plug
Very often the engine on a VAZ 2114 stalls due to faulty spark plugs. Sometimes a check mark blinks on the dashboard. Visual inspection often allows you to identify failed elements. In this case, you may notice carbon deposits, as well as other dirt and damage. You can check the serviceability of the spark plug with the help of a friend, since it is difficult to do this alone. The check is carried out as follows: One person starts the car starter, and the other puts the metal part of the spark plug with a high voltage to the engine. If the element is working properly, a spark should appear when the starter operates. If it is not there, the spark plugs need to be changed.
We make a diagnosis ourselves
Now that you know the reasons, let's look at how the diagnosis is done. You need to start with the simplest. Let it be a non-working cylinder.
So, the first thing you should do is start the engine and open the hood.
Then listen to the engine running and remember that sound. Now take out the high-voltage wires one by one. The spark plugs will not receive voltage and the cylinders will stop working. Listen. Has the sound changed? If not, then your problem is a bad cylinder.
Let's sum it up
The Chevrolet Niva engine may stall due to interruptions in the ignition system, poor transmission, or due to problems with the air supply.
In most cases, problems can be resolved independently by inspecting each part one by one. It is better to start troubleshooting from the simplest to the more complex.
The impetus for writing this post was a real repair at the request of a client, which consisted of a simple replacement of the vacuum booster, but isn’t it true that the engine may be tripping for the wrong reasons... In this post I want to consider the main reasons for this most unpleasant phenomenon, as well as methods for diagnosing and troubleshooting repair.
Trouble VAZ engine
Let's start with the signs that the engine is running rough. “Engine trouble” - by this we mean that one or more cylinders are not working. Accordingly, the engine does not develop full power, does not have the necessary traction force, fuel consumption increases... But we all already know this, closer to the point.
VAZ 2114 troits at idle
If the engine stalls when cold (at idle), there are three possible reasons:
- problems with fuel supply;
- problems in the ignition system;
- valves are poorly adjusted.
In this situation it is necessary:
a) do a general flushing of the fuel system, and also clean the injectors using ultrasound;
b) change the spark plug, a set of high-voltage wires and diagnose the ignition coil;
c) adjust the valves and, if necessary, replace them.
What to do if the engine stalls when hot. In this regard, professional auto mechanics believe that the reasons are the same as in the first case. At idle speed when the engine is warm, one of the cylinders may stop working due to malfunctions in the fuel supply system or lack of spark. The procedure is the same as for failures on a cold engine.
Although in a professional environment it is believed that engine tripling is a fairly rare failure, nevertheless, discussion of this problem on automobile forums, including for the VAZ 2114, suggests that these problems exist due to a large list of possible reasons for such failures, this becomes a serious headache for the motorist who encounters it. However, if you approach solving this problem calmly and thoughtfully, without trying to haphazardly replace one thing or another, it is quite possible to solve this problem.
Source
High voltage wires
Often the reasons why the engine stalls when cold is related to the failure of high-voltage wires. You can check their condition with a multimeter. If the elements are faulty, sometimes the tripping may not disappear even when the engine is warm. The problem is solved by replacing the wires. But sometimes it is enough to dry them and eliminate the causes of moisture getting on the elements, if it turned out to be the cause of the malfunction.
Useful : 7 reasons why the engine on a VAZ 2114 gets hot
Valve clearances
Unadjusted and too large valve clearances often lead to the “four” engine stalling when cold. This problem can be identified visually. Sometimes, if the valves are adjusted incorrectly, an unheated engine may make a characteristic knocking or knocking noise. Adjustment will eliminate the problem. If you have the skills, you can do it yourself.
Ignition module
The check light flashes frequently and the engine stalls due to moisture getting on the ignition module. In this case, tripping is usually observed on a cold engine. If symptoms persist after warming up, the coil may be broken. You can determine if it is broken with a multimeter. If moisture gets on a part, it is enough to dry it and eliminate the cause of the liquid. If it is faulty, the module will need to be replaced.
Useful : How to check the ignition module on a VAZ 2114?
Which engine is better: 1.5 8kl or 1.6 8kl?
When choosing a car, people often wonder, which engine is better? In our case, everything is not so simple. A similar question may arise if we consider the purchase of a car in an already shaggy year: 2006-2007. It was during this period that both 1.6l and 1.5l engines were installed on the VAZ 2113 2114 2115, the characteristics of which are outlined above.
In essence, the 1.5 and 1.6L 8cl engines are no different, except for volume, exhaust standards, fuel supply systems and a couple of sensors. Therefore, the main distinguishing point is the engine size. A difference of 0.1 liters gives much more torque from the bottom, a little more maximum power and, perhaps, even the same or even lower engine consumption than a 1.5 liter. The only negative is that it is noisier at idle.
Troit in wet weather
Yes, and this is not a joke. Many owners who have VAZ cars note that recently washed or just on a damp day, “iron horses” begin to trip.
Common causes include fluid that has gotten into the spark plug wells.
As a result, the spark plug stops sparking, which means the cylinder cannot work correctly. But that's not all.
Thus, various sensors could fail due to exposure to an aggressive environment. Also, when washing with high pressure washers, various vulnerable parts could be damaged.
As for environmental conditions, in wet weather the engine stalls after a long period of inactivity. The engine does not start immediately, but after the fifth or sixth time. The engine runs rough and unstable until it warms up completely. Visual inspection often does not give results. Engine operation becomes normal after some time until it cools down completely or until the next rain. The reason here is partly the same as after a car wash.
Dampness, or more precisely, condensation accumulates under the distributor body. There is an easy way to diagnose this problem. Start the engine in the dark. If you see lights under your hood, you need to replace the wires.
Don't forget about candles. If the engine does not want to start in damp conditions, then most likely the spark plugs need to be replaced. They may have stopped producing a strong spark. On a wet, rainy day, moisture can accumulate on the candles, which leads to current leakage. Ignition coils are also often to blame. Their bodies crack, and condensation accumulates in them.
Possible reasons
It turns out that there are quite a lot of reasons for such a malfunction in the VAZ-2114 engine. They directly depend on the nature of the vehicle malfunction. So, most often the VAZ-2114 engine will triple due to:
- non-working candle;
- broken high-voltage wire;
- ignition coil failure;
- faulty control unit;
- presence of air leaks in the intake manifold;
- exhaust valve burnout;
- broken cylinder head gasket;
- broken compression rings on the piston;
- burning out of the piston itself;
- a broken piston bridge between the compression rings.
But since we are considering a VAZ-2114, the engine can also be damaged by faults in the injector - a fuel system with distributed injection.
