Hatch STi ECU 'learns' to run badly?
#1
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Hatch STi ECU 'learns' to run badly?
As you can see from my other thread, I'm having issues with my hatch.
https://www.scoobynet.com/general-te...-the-cold.html
However since the last round of repairs I was concious to monitor how the car behaved after the battery was disconnected as when the plugs were changed it seemed to be fine for a week or so and then suddenly start playing up.
I've done 250 miles since the injectors were changed and again, yesterday, the car started playing up after running spot on for the last week.
My question is can the ECU adjust it's map to run badly? I assume that disconnecting the battery for a few hours resets it and then it runs ok. After a while it seems to revert to it's bad old ways and I'm not convinced that my ECU isn't playing up. If there was a genuine problem that the ECU responded to then I'd expect it to go 'bad' straight away, not let it run for a while before running badly.
Hopefully the above makes some sense! I'm now planning on getting it remapped just to try and iron out the issues.
https://www.scoobynet.com/general-te...-the-cold.html
However since the last round of repairs I was concious to monitor how the car behaved after the battery was disconnected as when the plugs were changed it seemed to be fine for a week or so and then suddenly start playing up.
I've done 250 miles since the injectors were changed and again, yesterday, the car started playing up after running spot on for the last week.
My question is can the ECU adjust it's map to run badly? I assume that disconnecting the battery for a few hours resets it and then it runs ok. After a while it seems to revert to it's bad old ways and I'm not convinced that my ECU isn't playing up. If there was a genuine problem that the ECU responded to then I'd expect it to go 'bad' straight away, not let it run for a while before running badly.
Hopefully the above makes some sense! I'm now planning on getting it remapped just to try and iron out the issues.
#2
18 June 1815 - Waterloo
iTrader: (31)
As you can see from my other thread, I'm having issues with my hatch.
https://www.scoobynet.com/general-te...-the-cold.html
However since the last round of repairs I was concious to monitor how the car behaved after the battery was disconnected as when the plugs were changed it seemed to be fine for a week or so and then suddenly start playing up.
I've done 250 miles since the injectors were changed and again, yesterday, the car started playing up after running spot on for the last week.
My question is can the ECU adjust it's map to run badly? I assume that disconnecting the battery for a few hours resets it and then it runs ok. After a while it seems to revert to it's bad old ways and I'm not convinced that my ECU isn't playing up. If there was a genuine problem that the ECU responded to then I'd expect it to go 'bad' straight away, not let it run for a while before running badly.
Hopefully the above makes some sense! I'm now planning on getting it remapped just to try and iron out the issues.
https://www.scoobynet.com/general-te...-the-cold.html
However since the last round of repairs I was concious to monitor how the car behaved after the battery was disconnected as when the plugs were changed it seemed to be fine for a week or so and then suddenly start playing up.
I've done 250 miles since the injectors were changed and again, yesterday, the car started playing up after running spot on for the last week.
My question is can the ECU adjust it's map to run badly? I assume that disconnecting the battery for a few hours resets it and then it runs ok. After a while it seems to revert to it's bad old ways and I'm not convinced that my ECU isn't playing up. If there was a genuine problem that the ECU responded to then I'd expect it to go 'bad' straight away, not let it run for a while before running badly.
Hopefully the above makes some sense! I'm now planning on getting it remapped just to try and iron out the issues.
#4
18 June 1815 - Waterloo
iTrader: (31)
Or it may be as simple as the fuel filter not being changed.
I am unfamiliar with the new hatches but my old WRX RA filter when I changed it had a small amount of very fine dust in it but I know it had not been in there long. So depending on the last time yours was changed it may be worth a check.
Take it off and drain it into a glass to see if you have any sh*te in it. If not then it's a simple thing ticked off.
#7
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It has the power to adjust fuelling to a degree, and if it sees something wrong or out of place within the map it will do what it sees fit to try and keep things happy. If it is repeatedly seeing something wrong then it may not change the fuelling tables back to original map until what ever the cause is solved. It doesn't re write a map as such to use as default tho no, it refers to tables for reference that have been set.
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