Engine really struggling to run climate control

[tmf001]

So here's a problem one in a long line since I've gotten 2.8 Signum last June.

Basically whenever the climate control is on, regardless if its cold or hot air, the motor really starts to struggle.
On idle the revs go up and become irregular, it starts shaking, etc.

For some background, since last summer I've had the alternator restored, then the alternator pulley failed and was replaced. Then last month it was in at dealers, they found that the wire going to the LED daylights had not been properly fastened and was heating up which seams to have messed up the electrical elsewhere.
The dealer thinks that as result of them daylights wire burning up, the wiring between the alternator and the battery needs replacing. Quoted me 1500 euro for new wiring

Basically could it just be that the blower fan is done for and is pushing the alternator for more energy than it would normally need?
The problem only seams to occur when the auto climate is on. Other electricals run fine even seat heating and cooling.

Anyone seen something like that ?

[justin32]

Have you had the charging voltage checked with the CC is on?

[tmf001]

Have you had the charging voltage checked with the CC is on?

Just checked, the voltage is perfectly within range abt 13.5 with engine on 11.8 when off.

Also did tried to push the electricals to the limit without CC on, like had all seats heated etc. And that pushed the revs up a bit two, made the engine shake a bit.

[tmf001]

Another thing, it really drives like crap with CC on, it might be just me, but with CC on it feels really heavy and sluggish.

[Jon1796]

What was V when everything was on.


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[tmf001]

Just the normal 13.5v, that's the strange thing, the alternator and battery seem to be fine

[Dog_Book]

You say theres a problem with climate control on, how do you turn it off? Mine has full ACC and its on all the time unless i manually switch the fan speed to 0 of course.

[Jon1796]

Going out on a limb here coil packs and plug gap. If gap is to big and coils are weak she gonna struggle.
As your asking a lot of ‘V’.


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[fatfred]

Just checked, the voltage is perfectly within range abt 13.5 with engine on 11.8 when off.

Also did tried to push the electricals to the limit without CC on, like had all seats heated etc. And that pushed the revs up a bit two, made the engine shake a bit.

I would expect around 14V charging.

Post by @plasma here

[Sindy]

I'd try a new battery first, shouldn't be as low as 11.8 with the engine off. See if you can borrow a known good battery off a mate before spending anything.