Hello. I have a problem with Skoda Fabia 1.4mpi AZE engine code. Namely, jerks at a lower speed of 1200-1600 rpm. The electrician said I had a vacuum problem so I started with it. Head gasket replaced, head made. After this operation, it improved a little, but injection time 3.09-4.12 and...

Fuel pressure to check. It tugs when it has a high fuel demand.

3 bar without vacuum 2.5 with vacuum at idle. Added after 3 [hours] 41 [minutes]: I did not write that the car with LPG. The problem occurs on Pb and LPG. Usually this is the case when I slow down the car to a speed range of 1200-1600 and want to equalize or increase it. Then it starts to jerk. The only thing that saves me at the moment is pressing the clutch and letting the RPM fall to minimum or pressing the clutch and adding gas. After that, the engine runs normally until I have to slow down or raise the engine again in the 1200-1600 RPM range, then the problem returns

What LPG installation, because I can't see even a vintage car.

Year of manufacture 2001. Installation Kme. Only if Pb or LPG are the same symptoms. I drove a bit on Pb itself because I thought it was by LPG but nothing has changed

How long have you been riding on LPG?

I bought Skode with gas. She made 60,000 on the installation.

Check the pressure in the cylinder, gas rings work harder, maybe they are running out.

I did it at the very beginning. Pressure 12.5 on each cylinder. As I was replacing the head gasket, I pulled out the sleeves to replace the gaskets under them. Even the edge is not on the sleeves and the honing is original. Nothing gets oil from oil to oil.

You had the bottle turned off? Gas from pipes burnt out? Because if not, it sucks.

The common part for these fuels is the ignition system. Replace the coil module for the test. What are your spark plugs?

[Solved] Skoda Fabia 1.4 mpi AZE Engine Issue: Jerking at 1200-1600 RPM, Vacuum & Software Problems?

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#1 17053319 21 Feb 2018 16:28

Łuki0601 Łuki0601

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Post #1
17053319 21 Feb 2018 16:28

Hello. I have a problem with Skoda Fabia 1.4mpi AZE engine code. Namely, jerks at a lower speed of 1200-1600 rpm. The electrician said I had a vacuum problem so I started with it. Head gasket replaced, head made. After this operation, it improved a little, but injection time 3.09-4.12 and negative pressure 360-390 shows on Vag. I replaced the throttle, gas pedal, coil, candles. The problem persists. I called the service and they told me that maybe the software was falling apart. Is it possible? I am asking for advice because I have put too much money into this car
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#2 17053336 21 Feb 2018 16:37

Pawel wawa Pawel wawa

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Post #2
17053336 21 Feb 2018 16:37

Fuel pressure to check. It tugs when it has a high fuel demand.
#3 17053378 21 Feb 2018 20:35

Łuki0601 Łuki0601

Level 9

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Post #3
17053378 21 Feb 2018 20:35

3 bar without vacuum 2.5 with vacuum at idle.
Added after 3 [hours] 41 [minutes]:
I did not write that the car with LPG. The problem occurs on Pb and LPG. Usually this is the case when I slow down the car to a speed range of 1200-1600 and want to equalize or increase it. Then it starts to jerk. The only thing that saves me at the moment is pressing the clutch and letting the RPM fall to minimum or pressing the clutch and adding gas. After that, the engine runs normally until I have to slow down or raise the engine again in the 1200-1600 RPM range, then the problem returns
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#4 17054532 21 Feb 2018 22:55

Pawel wawa Pawel wawa

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Post #4
17054532 21 Feb 2018 22:55

What LPG installation, because I can't see even a vintage car.
#5 17054669 22 Feb 2018 00:09

Łuki0601 Łuki0601

Level 9

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Post #5
17054669 22 Feb 2018 00:09

Year of manufacture 2001. Installation Kme. Only if Pb or LPG are the same symptoms. I drove a bit on Pb itself because I thought it was by LPG but nothing has changed
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#6 17055565 22 Feb 2018 15:10

szumi214 szumi214

Level 11

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Post #6
17055565 22 Feb 2018 15:10

How long have you been riding on LPG?
#7 17055766 22 Feb 2018 16:46

Łuki0601 Łuki0601

Level 9

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Post #7
17055766 22 Feb 2018 16:46

I bought Skode with gas. She made 60,000 on the installation.
#8 17055790 22 Feb 2018 17:01

szumi214 szumi214

Level 11

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Post #8
17055790 22 Feb 2018 17:01

Check the pressure in the cylinder, gas rings work harder, maybe they are running out.
#9 17056012 22 Feb 2018 18:35

Łuki0601 Łuki0601

Level 9

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Post #9
17056012 22 Feb 2018 18:35

I did it at the very beginning. Pressure 12.5 on each cylinder. As I was replacing the head gasket, I pulled out the sleeves to replace the gaskets under them. Even the edge is not on the sleeves and the honing is original. Nothing gets oil from oil to oil.
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#10 17056272 22 Feb 2018 20:08

Pawel wawa Pawel wawa

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Post #10
17056272 22 Feb 2018 20:08

Łuki0601 wrote:
I drove a bit on Pb itself because I thought it was by LPG but nothing has changed
You had the bottle turned off? Gas from pipes burnt out? Because if not, it sucks.
#11 17056341 22 Feb 2018 20:28

hobbista hobbista

Level 22

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Post #11
17056341 22 Feb 2018 20:28

Łuki0601 wrote:
Only if Pb or LPG are the same symptoms.
The common part for these fuels is the ignition system. Replace the coil module for the test. What are your spark plugs?
#12 17057983 23 Feb 2018 16:00

Łuki0601 Łuki0601

Level 9

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Post #12
17057983 23 Feb 2018 16:00

New NTG candles, new coil. Gas injectors disconnected. Ie disconnected tubes.
#13 17110192 17 Mar 2018 20:54

Łuki0601 Łuki0601

Level 9

» | Topic author Positive voted Helpful post? (+98)

Post #13
17110192 17 Mar 2018 20:54

Problem solved.
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Topic summary

The discussion revolves around a Skoda Fabia 1.4 MPI AZE engine experiencing jerking issues at 1200-1600 RPM, affecting both petrol and LPG fuel types. Initial diagnostics suggested a vacuum problem, leading to a head gasket replacement and head work, which provided slight improvement. Despite replacing components such as the throttle, gas pedal, ignition coil, and spark plugs, the jerking persisted. Users suggested checking fuel pressure, cylinder pressure, and the ignition system, with one noting that the LPG installation might be contributing to the issue. The author confirmed that the problem occurs regardless of fuel type and mentioned that the gas injectors were disconnected for testing. Ultimately, the author indicated that the problem was resolved, although the specific solution was not detailed.
Summary generated by the language model.