How to tell a faulty ECU?

All sifus & simous,

Anyone know how to tell,diagnose or check if the ECU is spoiled or whatsoever??

Many thanks!

Thanks to all bros who had comment...

zan : u're definately right, if the ECU is totally KO then of course it will tell us. But I would love to know how to tell if it's NOT totally faulty but part of it or going to KO?

SkYwAlKeR : at this moment, I would juz like to know whether my ECU is faulty. My car jerks for no apparent reason, after changing and checking all things such as; spark plugs, fuel pump, injectors, plug cable, throttle body....errrrm I thk it's abt that. But it still jerks?? Hai...tot of checking the ECU and fuel tank. Any idea? And would be glad if you could share how to check an ECU if I would hv to replace it. Thanks...

xerofighter : how abt manual? I'm driving manual. My car jerks as u've mentioned but no check lights on...what the heck! Cant seem to fix it. At the moment none of the mechanics are able to diagnose what's the problem.

Vacuum hose too is replaced! Any other things that would cause a car to jerk?? HELP!!! So damn frustrated to drive ever since, feel like juz taking a bus!

Bro, something like that though. It's heavier if air-cond is on. It will normally feel hard/jerking/hesitate to go during low rpms e.g. below 3k. Normally jerks as I accelerate from 1k~3k on each gear. Higher gear jerks lesser. Mine is a 6 yrs old car, considered old I thk, it's transplanted with MIVEC inside. Any idea what to check with the gearbox? Check the flywheel (didn't skim), clutch plate and clutch or check the gears area?? Thanks...

What actually the problem u're referring me to?

ryucky81 said:

jerk har.ur car will feel heavy or not har when tekan minyak? old car or new car. if new car go back service centre. if old car have ur gear box check.

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escaflowne : Bro, thanks. But if you read my earlier postings I've done what you've posted but to no avail. Thanks anyway.

Does a faulty distributor coil makes a car jerk??

Bro, mine jerks only at low rpms (<3k). Can you please tell me what to check with the gearbox?? Thanks...

This is what ryucky81 said too but what to check for??

I see...the syncro mesh. I didn't know it will make a car jerk...ok ok I'll get it check. But shit, I juz change the gear oil, using Q8. Damn...Thanks man...

Bro, it's MIVEC...and I'm would like to know how to diagnose or check the ECU. The easiest is to get a spare and replace it to check. But can the chop shop borrow ar? If not how...

escaflowne said:

What car are you driving? i guess as what you said,need to check from the ECU.

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