I don't know you drive what car or is it the same problem.
On saga blm same problem occur. Couple of months ago, start engine without AC only can run. If with AC, it'll drag the engine and cause engine to die.

At first send to nearby mech, I ask him to increase RPM, he said it's all controlled by ECU, so can't. (That time it didn't die when AC turn on).

Then later AC problem came, sent it to more honest mech, he said this problem very normal with saga blm.
Need to clean throttle body & if possible clean intake valves. After clean it no more engine die.

There are intake valve spray that you can diy yourself also

This post has been edited by AllnGap: Nov 13 2018, 06:13 PM

throttle body is the control centre for the air intake, when u press on pedal throttle body will open its mouth
if the jerk is coming when it's low RPM (idling), so the throttle body is not functioning well as it could not maintain smooth airflow.
either throttle body or the O2 sensor there going crazy. (sensor can get dirty as well, or fail)

When turn on AC, the drag simply pulls the engine and kills it. nothing to do with AC, it's the throttle body cant maintain its function.

better to service it and see got difference or not.
some mechanics might ask you to ended up changing throttle body, O2 sensor, but the problem is just that it's dirty.







watch this if your engine is jerking when idling.



This post has been edited by AllnGap: Nov 13 2018, 11:01 PM

Won't take so long. A week or two maybe for it to familiarise.
But dirty throttle body & air sensors can cause stupid problems that you can never think off. Can cause engine light turn on, then you panic and ended up spending thousands.

Later change alternator, spark plug, battery, starter ding-dong when the real problem is it's dirty n couldn't operate normally

Your car no more jerking d ??

All smooth ?? That throttle body should be serviced like every year or 2years once.
Car will feel better, power immediately deliver

If have voltmeter would it be easier ?
Cuz when driving voltage should be around 14.

If it's like 12.5 then alternator not working.

I mean voltage on alternator.
Cuz alternator not working the voltage won't be 14

i think safe to assume that after 15years or more than 200,000km all the things upcar d

my old car at 195,000km confirm got lots of problem.

AC = sometimes compressor dont run (suspect clutch KO)
alternator = car left there for weeks, after jumpstart drive 20min also cant start, new battery btw. alternator should be dead
starter = cant start smoothly

looks like gotta ask them refurbish all 3

This post has been edited by AllnGap: May 28 2019, 07:28 PM

Alternator inside has some carbon brush and ball bearings

If your battery can't charge properly then alternator might on its way.

My old kenari alternator kacau around 190,000km.

I think yours still have plenty of life in it