4G92 MIVEC questions, anyone running one

jay_lancer

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Hope they remove the battery terminal when doing the welding, but for exhaust normally the welding done off the car, then just hook up to the car when ready, or yours require welding while on the car?:hmmmm:
not sure, i was not there, I would have hoped they disconnected the battery. Maybe they did and it was just bad luck the ECU had an issue.

If a suitable ECU cannot be found, can they be repaired?

Thanks
 

vr2turbo

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not sure, i was not there, I would have hoped they disconnected the battery. Maybe they did and it was just bad luck the ECU had an issue.

If a suitable ECU cannot be found, can they be repaired?

Thanks
Depends what is wrong. mine the issue was leaking capacitors, so after changing was running....:driver:
 

Izso

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not sure, i was not there, I would have hoped they disconnected the battery. Maybe they did and it was just bad luck the ECU had an issue.

If a suitable ECU cannot be found, can they be repaired?

Thanks
There's a guy on FB that fixes ECUs and aftermarket ECUs etc. I can find the contact and share it with you if you're interested.
 

jay_lancer

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There's a guy on FB that fixes ECUs and aftermarket ECUs etc. I can find the contact and share it with you if you're interested.
that would be great, any lead I can find would be very welcome at this stage

thanks for your support
 

jay_lancer

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this is how it is running as of now, very rough idle when cold, gets smoother when the engine gets hotter

https://youtu.be/e4BKg1PHieI

the shop tried my ECU on another customer car with the same engine and it had the same issue
 

^pomen_GTR^

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this is how it is running as of now, very rough idle when cold, gets smoother when the engine gets hotter

https://youtu.be/e4BKg1PHieI

the shop tried my ECU on another customer car with the same engine and it had the same issue


seems like u need them to service the throttle body assy clean them up properly...
 

jay_lancer

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seems like u need them to service the throttle body assy clean them up properly...
They tried that first, tried 3 different throttle body assemblies. I agree that is what it looks like at first.

I think one of my Thai friends has tracked down a second hand ECU, hoping this comes through and I can get my car back!

cheers
 

sweelt

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my noob guess. ECU are learning, but it seem like something or sensor give irregular reading so it try to counter it.
Scantool read any faults ?
See any engine that can use ur ECU as test to confirm its OK or really ecu kaput.
Don shoot me, i'm learning too. :hmmmm:
 
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jay_lancer

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my noob guess. ECU are learning, but it seem like something or sensor give irregular reading so it try to counter it.
Scantool read any faults ?
See any engine that can use ur ECU as test to confirm its OK or really ecu kaput.
Don shoot me, i'm learning too. :hmmmm:
not a crazy suggestion, some ECU's have 'learning' abilities, the ECU in the 2001 Audi TT which was the last car I owned in the UK before moving to Asia 'Learned', you could notice a slight difference if you disconnected and reconnected the battery, miss that car


In this case I don't think the tick over at cold would be so bad however, also as you suggested they already tried my ECU on another car withe same engine and no other issues, and the rough running at idle when cold issue was duplicated when my ECU was plugged in. They did use a scan tool to look for error's, and none came up, then they sent out for a ECU specialist who hooked the ECU to his notebook and said there was an issue.

Not sure of the exact issue as they were talking in Thai, and my Thai language skills are not good enough to understand exactly what he said.

Hopefully the replacement ECU my friend found will work, will keep the other one and try and get it fixed if they don't give me money off.

thanks for all the support so far!
 

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jay_lancer

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Aug 21, 2015
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Did not try the customer ECU on your car?:driver:
Unfortunately that was not possible, I guess the owner of that car did not want to risk his ECU, I don't really blame him.

Anyway I have a replacement ECU now, if it works should get the car back Friday or Saturday.


One thing I love about living here, is there are little business dealing with all aspects of car parts, (or anything else), you just need the contacts to find them!

This issue has been frustrating but also learning loads too, so not all bad :biggrin:

Nothing much like this in the UK were I am from, only ebay for stuff like this and a big wait for delivery.

cheers
 

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vr2turbo

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Unfortunately that was not possible, I guess the owner of that car did not want to risk his ECU, I don't really blame him.

Anyway I have a replacement ECU now, if it works should get the car back Friday or Saturday.


One thing I love about living here, is there are little business dealing with all aspects of car parts, (or anything else), you just need the contacts to find them!

This issue has been frustrating but also learning loads too, so not all bad :biggrin:

Nothing much like this in the UK were I am from, only ebay for stuff like this and a big wait for delivery.

cheers
The numbers on the ECU differ? sure the same? I mean ECU model number.

In Malaysia, have these businesses too....:driver:
 

jay_lancer

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Aug 21, 2015
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https://www.facebook.com/repairecu1malaysia/

I know the repair guy personally. He' a en electronic techno wizard

WOW looked at the facebook page, very impressed, thanks very much for posting!

I have now found the reason the initial ECU was damaged, it was due to a mistake by the wiring guy.

Luckily this mistake was discovered before the replacement ECU was fitted.

The wiring issue has been fixed and I should be able to get the car on Tuesday, trying not to get too excited as there has been so many false dawn's with this project.

My mechanic and his wiring guy had a big argument!

I will keep my damaged ECU and will see if I can fix it in the shop Izso recommended next time I am in KL which will be later this year.

Thanks for all the support and suggestions!
 
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Dear Friends

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