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Ford Focus mk2 Duratec HE 2.0 - wave turns after turning on the directional

lukeros 6549 10
Best answers LABEL_AI_GENERATED

Why does a Ford Focus Mk2 2.0 Duratec HE idle fluctuate when the turn signals or hazards are switched on?

The most likely cause is a charging-system problem, especially low alternator output, a bad voltage regulator, or poor ground connections. One reply noted that 13.8 V at idle is too low, and another compared it with a similar car that held 14.2 V instead [#16370146][#16372454] The thread recommends checking the battery voltage after switching the engine off, because if it is above 12.60 V and the charging is still weak, the alternator, regulator, or masses are suspect [#16372073] It was also suggested to verify the meter and mass connections [#16370163] The original poster later reported that the alternator had been repaired but the rpm wave with turn signals remained, so the fault may still be in the wiring/grounds or measurement path rather than the alternator itself [#16377857]
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  • #1 16369196
    lukeros
    Level 10  
    Posts: 42
    Rate: 20
    Hello . As in the title, I wrote previous posts about undulating rotation but no one answered my question. Throttle cleaned, candles new, coils new. It waves when turning on the turn signals and emergency. What could it be? I measured the charging voltage, 13.8V at idle. Here is the link to the video where the same symptoms are shown. For me it is the same as for the author of this film
    https://www.youtube.com/watch?v=9noY7U4Vjtk&feature=youtu.be
    The same, only for me, with emergency waves, and also turn signals.
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  • #2 16369800
    emeryt2
    Level 42  
    Posts: 7630
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    Insert another battery or fully charge the one (this is from the movie).
    Such a little digression; You must have read Ulysses and hence the tendency to lack stop signs and capital letters. Reading it, it grinds its teeth, and this "sea" is probably Baltic.
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  • #3 16369849
    lukeros
    Level 10  
    Posts: 42
    Rate: 20
    Welcome back! Sorry for the spelling, I thought I would get some help here, not Polish lessons. And as for the battery is new, maybe it's the alternator, what else I noticed that when I raise the revs and drop to about 1500 rpm, the lights are gently looking.
  • #4 16370146
    andrzej20001
    Level 43  
    Posts: 17829
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    You do not have major problems with this car?
    lukeros wrote:
    13.8V at idle
    too low
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  • #5 16370163
    MobilTruck
    Level 31  
    Posts: 1703
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    If it bothers you so much, I would start with a review of the meter and then mass connections.
  • #6 16370249
    emeryt2
    Level 42  
    Posts: 7630
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    Rate: 2302
    Hello
    Only in the second post we found out that the battery was new.
    He is right Col. Andrzej - low charging, possibly an alternator or a charging module (regulator).
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  • #7 16371260
    lukeros
    Level 10  
    Posts: 42
    Rate: 20
    The biggest problem is when I go, I will stop, I wave for a moment harder and when I turn the directions on all the time in the rhythm of the flashing, the lights dim as I wrote today, but it's only once about 1500 rpm when it drops from the revolutions what was done new battery, candles, coils, throttle I checked for a change, I replaced the flap suction manifold with new ones, today I measured the voltage under load, lights on, windshield back, watch the movie and see what your task may be. Provides link: https://www.youtube.com/watch?v=KIkNRUlmnkc&feature=youtu.be
  • #8 16372073
    emeryt2
    Level 42  
    Posts: 7630
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    Well, your charging is very bad.
    At a standstill, after turning off the ignition and waiting for a while, what is the voltage on the battery? If it is above 12.60 volts then you can have;
    - blown alternator,
    - damaged voltage regulator,
    - or (as Kol.Pitool writes) - masses, masses.
  • #9 16372454
    lukeros
    Level 10  
    Posts: 42
    Rate: 20
    I checked the ground connections, and as for the voltage, moments after turning off 13.1. I checked with my brother, he has the same car with the same engine and he has 14.2 and not below this voltage. You need to get ready for the regeneration of the altka.
  • #10 16377857
    lukeros
    Level 10  
    Posts: 42
    Rate: 20
    The alternator is done and there is no improvement with the revolutions wave after turning on the turn signals or emergency. Do you have any more ideas?
  • #11 16760971
    ptr92
    Level 19  
    Posts: 559
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    What is the problem?
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Topic summary

LABEL_AI_GENERATED
The discussion revolves around a Ford Focus mk2 with a Duratec HE 2.0 engine experiencing voltage fluctuations when the turn signals or emergency lights are activated. The owner has replaced the throttle, spark plugs, and ignition coils, and measured a charging voltage of 13.8V at idle. Responses suggest potential issues with the alternator or voltage regulator, as well as grounding connections. The owner confirmed a voltage drop to 13.1V after turning off the ignition, while a comparison with a similar vehicle showed a healthy 14.2V. Despite replacing components, the problem persists, prompting further inquiries for solutions.
AI summary based on the discussion. May contain errors.
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