Low RPM with headlights on and other problems...

[randyV]

May problem lang po ako sa car ko. The symptoms are as follows:

1. Low RPM with headlights and aircon on and during full-steering... halos mamamatay makina...

2. Brakes are weak with A/C on... ok naman with A/C off..

3. Halos mamamatay din ang makina when backing-up... lalo na kapag naka on ang headlights..


Idle RPM is normal naman.. around 750... bagong palit din ang sparkplugs.


Ano po kaya problem nito?


Thanks a lot ...

[isa1023]

I'm no expert sir but I think it's either weak alternator or most likely, compressor belt locked too tight or compressor clutch bearing close to stucking up or giving up.

Is your car using carburator or EFI?

If it's using carb, another possibility could be that the idle-up mechanism for aircon is either clogged or no longer working.

[ghosthunter]

Check the battery terminals.

Sounds like you have a bad connection to the battery.

Clean the terminals and re-tighten.

[randyV]

I'm no expert sir but I think it's either weak alternator or most likely, compressor belt locked too tight or compressor clutch bearing close to stucking up or giving up.

Is your car using carburator or EFI?

If it's using carb, another possibility could be that the idle-up mechanism for aircon is either clogged or no longer working.

My Car is EFI --- Sentra ECCS

[randyV]

Additional symptom, RPM drops and headlight dims when aircon is on turned on...

[CivicVTi]

Most likely a malfunctioning alternator or battery. Have it checked by an electrical specialist. A battery store can check your alternator charging/battery status for free.

[ben_david19]

sir bili kayo ng voltmeter (digital preferably around 900 pesos lang naman).

if reading is below 12.50, mahinang-mahina na po ang charging ng alternator niyo.

[randyV]

Thanks po sa mga reply...

Additional symptom po ulit... dashboard panel lights also dim when aircon is turned on...

[ghosthunter]

Thanks po sa mga reply...

Additional symptom po ulit... dashboard panel lights also dim when aircon is turned on...

That's pretty much the effect if the voltage of the electrical system drops.

Check if the battery is good.

Check if the connection to the battery is good or loose.

[youngrider]

Is your car diesel powered? (brake boost is by vacuum pump at the tail of alternator)

Possible causes:

Imprope alternator belt tension, worn alternator belt, weak alternator, non-functioning AC idle-up mechanism, weak engine power (any cause).