[Solved] Opel Zafira 1.8 A18XER: Engine Wavers, Stalls & Steering Lock Issues at Low Temperature

Hello,

In Zafira 1.8 (A18XER) sometimes just after firing (only after a few hours of parking) for several / several seconds the engine wavers at revolutions in the range of 1000-1100.
In addition, recently, when changing the gear (usually 2, 3, 4), after pressing the clutch, the revolutions are about 500-1500 revolutions and return to their position (800-900). Another thing related to this, when driving, and exactly when commuting, for example, to intersections or lights, after removing the leg from the gas and pressing the clutch, the engine goes out, after the previous rotation of the rotation.
The engine goes off sporadically and only if the engine is not heated to 90 degrees. On the road it is dangerous because after closing the engine the steering wheel is blocked during light traffic.
After heating the engine to 90 degrees, the above-described problems do not occur.
I do not know if these few second wavy turns have something to do with the speed of rotation when changing gear or the engine goes out, but I wrote it, because maybe someone will give me a hint and help me locate the fault.

I will add that the car has the BRC gas system installed, but the above-mentioned problems occur both as the car drives both on the gasoline itself and on lpg.

Is anyone able to help you locate the problem?

bubus1769 wrote:

It's worth it at the beginning

At the very beginning it is worth to do good diagnostics dedicated to Opel hardware.
The result of this action can explain a lot about the turnover.
Of course, to interpret the result of tests is necessary someone who has a concept and knows what values are correct.

I have an interface dedicated to opel and it only shows error P0171, but I had this error a few months earlier, before the symptoms appeared as above.
I do not know too much about parameters, and I do not even have anything to compare with.
I have heard that the throttle can be sated or a stepper motor, but I can not locate it in my engine.
Next week I will have to take down the throttles and clean it

bubus1769 wrote:

In this engine, there is no such thing as a crotch because the throttle is electronic, the error about the sub-mixture appeared on gas and gas or only on gas?

the mistake is all the time and on gas and gas (even if I drive only on gas for a long time)

Do you need to adapt after cleaning the throttle?

In 1.8 there was a problem with the mass flowmeter. Look for faq on this topic

Yesterday I cleaned the throttles, I started the car (without driving) and everything was going on, today I'm going to the streets and it turned out that it is not good. During the ride, after each pressing of the clutch, or throwing it in play, turns rotate, first fall to about 1000 revolutions and immediately jump to the level of 2000 - 2500 and sometimes up to 3500 revolutions. After a few seconds of waving at higher revolutions, it returns to around 800. Immediately after starting the engine, even as it stalls in the place, everything is ok with revolutions, the problem starts as I go a few meters, then even at low speed the spins jump.
I hooked it to the computer and showed error P2119, which was deleted on the engine and no longer shows.
Flowmeter efficient.

Did I do something wrong while cleaning the throttle, or is it some other fault or gets "left" air? Maybe you need to do a throttle adaptation? Any idea?

A hybrid ECU of the engine may be damaged.
It will locate the fastest and easiest way by "replacing" for the whole set (ECU, immo loop, transponder).
You will not even need to program anything (at least for the test)
This way you will eliminate the very common fault in Opel and you will be able to focus on the remaining elements of the engine.

It will update the topic a bit.
Last week I was on the site to make adaptations of the throttle and to see if something else might be wrong.
To my surprise, the site did not find a mistake in my car and according to them is OK!
After cleaning the throttle and after its adaptation and driving week, the situation looks like this:
I start the car, no waving, whether on a cold or warm engine. All you need to do is move and, as I put on the play, the revolutions wave to 1500, sometimes up to 2000 and 3000 revolutions, until the car stops, then it drops to about 800.
I will add that such symptoms came out after cleaning the throttle, before there was nothing like that.
Will it be a damaged ECU, or some leak in the system (I have no loss of power while driving)?

It remains probably only reading the parameters while driving.

Hello
I have the same problem I found out that this is a stepper motor that occurs with the X18XE1 throttle. 1500 price for a new 200-300 dose.
As for the ACU, it is rather a good new ACU about 1500 plus adaptation with an immobilizer at not easy to better complete a set to recognize the immobilizer
You can search for alegro

Vacuum tight lines? If there is an EGR valve, check it.

I don't know, but it is worth assuming that this wave may also result from the shaft position sensor. If the car is stationary and nothing is happening, it's ok. But if it moves and waves, this shaft sensor can be.

Moderated By gulson:

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Hello,
The problem practically solved itself, the car was running, the waviness was less and less, until after about 3-4 months it disappeared completely. I don't know what was the cause of the waving, maybe the throttle had to tune after cleaning. Even the mechanics could not find the problem, so the problem solved itself .