Low RPM with headlights on and other problems...

**renzo_d10** · September 17th, 2010 05:26 PM

Originally Posted by 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).

Di yan. Sentra ECCS e.

**ghosthunter** · September 17th, 2010 05:30 PM

Originally Posted by 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).

From his profile, he drives this car: Nissan Sentra ECCS SS 1992 A/T

**youngrider** · September 17th, 2010 05:52 PM

Sentra ECCS...Sorry, I failed to notice it.

I'm wondering, what is the idle-up mechanism of this car when AC is on, vacuum assisted, electronic spark advance with IAC valve activation.

Suggested order of inspection.

1. Battery connections and battery
2. Alternator belt
3. Alternator
4. Idle-up mechanism (is idle 750 RPM when AC is on)
5. ?
6. ?

**oj88** · September 18th, 2010 12:35 AM

Is the battery indicator on the dashboard lit up?

Almost the same set of symptoms happened to our ECCS a long time ago. 2 days later, it will no longer start due to a dead battery. We later found out that the alternator brushes were already worn out and it was no longer charging the battery.

**billnomoney** · September 18th, 2010 10:36 AM

insufficient ang supply for quick check,, start your engine , while running remove the battery terminal & observed the engine sound. at dapat ay still running parin at pag namatay si engine! si alternator ang salaring!

**isa1023** · September 18th, 2010 06:57 PM

Just be very careful. Removing the negative terminal from the battery pole will do just fine for a quick check.

**oj88** · September 18th, 2010 07:55 PM

Originally Posted by billnomoney

insufficient ang supply for quick check,, start your engine , while running remove the battery terminal & observed the engine sound. at dapat ay still running parin at pag namatay si engine! si alternator ang salaring!

Not advisable on cars with ECMs, which the Sentra ECCS obviously has. Doing so may introduce electrical surges and could cause more damage. Much more if indeed the alternator or RR is defective and is sending out unregulated and/or noisy electricity.

Think of the battery as one giant capacitor.

Beyond the hands of a good electrician, the Nissan CONSULT should be able to tell you if the charging system is out of spec.

**MarcRio** · September 18th, 2010 08:38 PM

Alternator or battery problem.

**D15B** · September 18th, 2010 09:35 PM

maybe you need a good grounding in your car. put a grounding kit just search it on how to hook it up. hth..

**aijie28** · September 18th, 2010 10:30 PM

pa add ako din nag dideam yung handbrake light,door open light(yun nga ba yun). nad dideam sya parang signal light pero hindi mo masyado halata kasi onting deam lang mine is nissan vanette. balak ko sana mag add ng grounding kit. puro bulok na kasi eh