Anybody has these symptoms?

[ALBundy]

The only other thing to check is the air mass sensor. It could also affect the shifting of your gearbox.

 

[flash]

See, see, OMGWTF, whacked your car kau kau and see what happened? Hmmm, sounds very perplexing. Until your alarm even got affected. Sounds like a manifestation of electrical problems? Symptoms sounded like what happened to my Wira. Intermittent loss of power, no matter how much I tekan, the car could not accelerate, alarm going berserk, sometime works, sometimes not, sometimes goes blaring. Sent to workshop, check here and there, could not detect anything wrong. In the end, one day, while driving, everything shut down. Could not restart. Nothing electrical was working. Changed battery, back to normal. Later found out the old battery was shorting....

How old is your battery?

 

[et5]

Hi Lee

Sounds like your electrics are shorting somewhere..have you checked your wiring and fusebox?
btw did you recently install any new ICE? maybe some wires not sealed properly :huh:

hope you solve it soon bro..and hope its not your gearbox!

 

[flash]

Originally posted by et5@Jun 5 2006, 09:38 AM
Hi Lee

Sounds like your electrics are shorting somewhere..have you checked your wiring and fusebox?
btw did you recently install any new ICE? maybe some wires not sealed properly :huh:

hope you solve it soon bro..and hope its not your gearbox!

Ha ha, his gearbox was serviced last year before a track day. But his car has lots of Pivots.... 3 at the last count? Maybe one of them is da culprit?

 

[Lee36328]

The Pivots are working wonderfully. Stop suspecting my pivots.

 

[Lee36328]

This puzzling problem manifesting in several seemingly unrelated symptoms was indeed traced to the battery. Good guess, Flash. If I got your opinion earlier, it would have saved me some perplexing time.

Since it was such an eye opener, I decided to post it up here as a case study.

I really thought something was wrong with my airflow, or airflow sensor, or O2 sensor and what not. Something to do with incoming air, definitely. And maybe time to service my gearbox too.

What finally gave me a clue was my alarm guy. "Alarm sounding without lights flashing? That means something is wrong w the fuse," he said.

The alarm is designed w a backup power source, which sounds when the main power source fails or is tampered with. I got my battery more than a year ago. The last I checked, it was still at 12.5 v.

But now, with my alarms blaring even when SWITCHED OFF, I was desparate to try anything. Get Jeffrey at M1 to give me a Delkor battery (maintenance free).

Hey presto! All symptoms improved or disappeared.

1. sudden loss of power while driving - no power no matter how hard you rev, intermittent; comes and goes. Gone.

2. fuel consumption climbing up. Much better now.

3. gearbox does not shift smoothly - no power between 2500 and 3000 rpm much improved.

4. alarm keeps going off for no reason completely back to normal.

5. rough idling and revving. smooth as baby's cheek.

My fuel consumption was as high as 15.95 litre/100 km at one point. At last full-tank check, it was at 11.52 litre/100 km, an improvement of 27.8%. A full tank can last me 500 km or more easily, mixed driving.

Thanks for all the valuable and interesting inputs, guys. They are helpful tips for future related problems.

From now on, I'm changing my battery once a year.

 

[3CI]

Originally posted by Lee36328@Jun 3 2006, 03:14 PM
Symptoms in my car recently :

1. sudden loss of power while driving - no power no matter how hard you rev, intermittent; comes and goes.

2. fuel consumption climbing up

3. gearbox does not shift smoothly - no power between 2500 and 3000 rpm

4. alarm keeps going off for no reason

5. rough idling and revving

Any ideas anyone?

im face before (not BMW) , is waja..

If not mistake , is valve problem ... . .. but we done this after overhaul

 

[flash]

Originally posted by Lee36328@Jun 5 2006, 10:24 AM
This puzzling problem manifesting in several seemingly unrelated symptoms was indeed traced to the battery. Good guess, Flash. If I got your opinion earlier, it would have saved me some perplexing time.

Since it was such an eye opener, I decided to post it up here as a case study.

I really thought something was wrong with my airflow, or airflow sensor, or O2 sensor and what not. Something to do with incoming air, definitely. And maybe time to service my gearbox too.

What finally gave me a clue was my alarm guy. "Alarm sounding without lights flashing? That means something is wrong w the fuse," he said.

The alarm is designed w a backup power source, which sounds when the main power source fails or is tampered with. I got my battery more than a year ago. The last I checked, it was still at 12.5 v.

But now, with my alarms blaring even when SWITCHED OFF, I was desparate to try anything. Get Jeffrey at M1 to give me a Delkor battery (maintenance free).

Hey presto! All symptoms improved or disappeared.

1. sudden loss of power while driving - no power no matter how hard you rev, intermittent; comes and goes. Gone.

2. fuel consumption climbing up. Much better now.

3. gearbox does not shift smoothly - no power between 2500 and 3000 rpm much improved.

4. alarm keeps going off for no reason completely back to normal.

5. rough idling and revving. smooth as baby's cheek.

My fuel consumption was as high as 15.95 litre/100 km at one point. At last full-tank check, it was at 11.52 litre/100 km, an improvement of 27.8%. A full tank can last me 500 km or more easily, mixed driving.

Thanks for all the valuable and interesting inputs, guys. They are helpful tips for future related problems.

From now on, I'm changing my battery once a year.

Hee hee, not a guess but from experience. Happened to one of my dad's old car too.

Somehow a battery that is about to die is either not giving the full charge or draining excessive power from the alternator. Hence the ECU and other modules which rely on stable electrical power is not getting what they are supposed to be getting and gets a "headache" i.e. "limp" mode....

 

[Lee36328]

No, it's more direct than that.

The battery powers everything electronic in the car. The alternator only charges up the battery when needed.

Hence, weak battery, weak car. Ignition, sensors, solenoids, etc are all affected.

 

[flash]

Originally posted by Lee36328@Jun 5 2006, 02:43 PM
No, it's more direct than that.

The battery powers everything electronic in the car. The alternator only charges up the battery when needed.

Hence, weak battery, weak car. Ignition, sensors, solenoids, etc are all affected.

Hmmmm, thot it was the other way round. The battery is for starting and powering the ancilliaries when the engine is not started. Once engine is started, the alternator recharges the battery and it also powers the electrical equipment.

If so, then the following could not be true....

My ex-Babe once had a weak battery because of a mysterious power drain. My mech did not have the cables with him then. He took the battery from his car, put his battery in my car and started it. He did a quick swap and replaced with my battery. Now if all power has to come from the battery directly, the engine should have died while he was exchanging the batteries....

 

[Lee36328]

Car Batteries

A car battery is principally used to start the engine. It is also used to filter or stabilize power and to provide extra power for the ignition, lighting and other accessories when their combined load exceeds the capability of the charging system, i.e., when the engine is idling. It also provides power to the electrical system when the charging system is not operating. The battery lies hidden under the bonnet and is an essential component of your vehicle. Regular care is a must, for if it in bad shape, the car will refuse to move. "Push-start" is a solution but cannot be carried on for long. A well-maintained battery lasts for two years. Regular care of your battery is a must, otherwise your car will not move. "Push-start" is an option but not a long term solution. A well maintained battery usually lasts for two years.

 

[vinson]

Try the adjustor valve at the manifold. Just got mine replaced today. Smoother & Quieter.

 

[Lee36328]

Originally posted by flash@Jun 5 2006, 03:25 PM
If so, then the following could not be true....

My ex-Babe once had a weak battery because of a mysterious power drain. My mech did not have the cables with him then. He took the battery from his car, put his battery in my car and started it. He did a quick swap and replaced with my battery. Now if all power has to come from the battery directly, the engine should have died while he was exchanging the batteries....