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#1 | ||
Regular Member
Join Date: Jul 2005
Location: Brisbane
Posts: 99
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I recently read the guide on how to reset the ECU. I have some idea of what it does but can someone give me an explanation as to the benefits of reseting. Is there any problem issues that can happen due to doing a reset?
Thanks in advance. (thinking about reseting my AUII Fairmont Wagon) |
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#2 | ||
Regular Member
Join Date: Jul 2005
Location: Brisbane
Posts: 99
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anyone got an info on this? even just a link because search brings up nothing
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#3 | ||
AFF Whore
Join Date: Apr 2009
Location: In between gas stations
Posts: 2,246
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From what I hear (don't quote me on this) people have claimed anything from improved fuel economy to increased power to doing absolutely eff all.
Some on here swear by resetting the ecu regularly, others think it's as useful as hooker with buck teeth. Edit: After doing it a couple of times to mine I haven't noticed any great performance or economy increase, just a reset fuel consumption and average km's guide. |
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#4 | ||
FF.Com.Au Hardcore
Join Date: Dec 2007
Location: Ballarat
Posts: 2,126
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Id like to do it, but Ive heard for the first 100km's or so the car runs like a pig and stalls. I think a big highway drive after any mods would have the same benefit.
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#5 | ||||
Resident AFF detailer
Join Date: Dec 2008
Location: Melbourne, VIC
Posts: 3,730
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Quote:
So after you follow the standard reset procedure: Quote:
I had the engine stall on me a couple of times (while going around corners, which wasn't fun since the power steering and brake booster die as well - made for some hairy moments!), but generally the more idling you do, the faster the ECU learns where the idle points are... I found when I did mine, suddenly the car felt a lot more responsive and smoother. Probably fair to say that the effects wear off once the engine 'relearns' everything, but FWIW, I reckon it's fine to do - especially after you've done any mods, should let the engine start afresh and relearn everything under the 'modded' system.... Reminds me, I should probably do mine again, hasn't been done since I had headers, cat and exhaust put in ![]()
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No longer an 'active' detailer. |
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#6 | ||
Regular Member
Join Date: Apr 2009
Location: gold coast
Posts: 299
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I had a miss in my AU when I tramped it, so I just reset mine. and found it to drive a lot better then it did B4. still has the miss only sometimes now but I have only drove it for about 10 mins.. but is a big improvement on how the car was.
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#7 | |||
ST fan
Join Date: Jan 2005
Location: Hunter Valley, NSW
Posts: 380
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Quote:
__________________
2013 Focus ST in TANGERINE SCREAM 2003 Focus Zetec in COLORADO RED
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#8 | ||
Regular Member
Join Date: Apr 2009
Location: gold coast
Posts: 299
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I just used my watch.. and let it run about 5secs over at the most and had no problems.
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#9 | ||
Starter Motor
Join Date: May 2012
Posts: 1
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Hi guys and sorry to dig up an old thread but looking at doing this to my AU Series III SR soon; its doing some crazy stuff.
When you say the car "learns" the driver/mods, is it better to drive it harder or more conservative ?? The reason I ask is because my mate had a Mazda MPS 3 and if the car was driven hard over this "learning period", the car had a more aggresive, sportier setting... |
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#10 | |||
FF.Com.Au Hardcore
Join Date: Aug 2006
Location: Salamander Bay
Posts: 5,427
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Quote:
__________________
[SIGPIC][/SIGPIC]
Everyone starts off with a bag full of luck and an empty bag of experience. The trick is to fill the experience bag before the luck bag is empty. "It is better to remain silent and be thought a fool than to speak out and remove all doubt." Start a new career as a bus driver Rides: FG2 XR6 stock at this stage but a very nice ride xc 4 DOOR X CHASER 5.8 UNDER RESTO |
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#11 | ||
FF.Com.Au Hardcore
Join Date: Jun 2005
Posts: 588
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Does the SR have adaptive shift mode or whatever it's called? That's the transmission, anyway, not the ECU.
The main reason I do an ECU reset is to stop the car shuddering at idle and high load (eg in reverse at 0% accel, with rear demister and headlights on, then the A/C compressor kicks in and the whole thing shudders like it's about to stall). Over time, several months, the ECU seems to "forget" and the shuddering gradually creeps back in, so I reset it again. I've never noticed any change in fuel economy. |
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#12 | ||
Starter Motor
Join Date: Nov 2011
Posts: 11
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I got a AU I 1999 Forte Wagon, converted to gas.
It was running rough and missing, so my gas guy diagnosed new plugs and leads and tweaked the computer settings. Seemed ok but on way home it backfired once. Then for next few weeks it would backfire at least once a day. Eventually it got a bit worse, missing, even on the highway, and to the point it almost stalled. I switched to running on petrol only, which was better, no backfire but after a while it also missed and ran rough occaisionally. I was thinking it may be electrical - like the coil pack arcing? Went on holiday for a month and came back - the battery was flat. I charged it and started it on gas - it drove like a dream, no backfire or missing, smooth idle even with AC on. Conclusion - resetting the computer due a flat battery fixed all the problems! My mechanic had no idea about this, wish someone had suggested it months earlier, saved me running on petrol for a few months at more cost! |
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#13 | |||
5.6L x 2 pilot
![]() ![]() Join Date: Dec 2009
Location: Canbra
Posts: 14,994
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Quote:
There may be other 'items' erased with a reset too, but I certainly are not aware of them, and I have not read of any in my tuning research. Hope that clarifies a bit. Cheers Stu
__________________
2002 AU II LTD 5.6L 342ci T3 Short, AFR165 heads, Comp XE270HR-12 Cam, Brembo 4/4s(355/330), T3 5 spokes, LC-1 wideband, Whiteline HD swaybars, TCE 3K Hi Stall, PWR Auto Trans Cooler, Koni shocks, King Low Springs, Hurricane headers, 100 cpsi cats, Twin 2.5" exhaust. Quarter Mile: 13.73 @ 105.86mph Runner Up NA/DA to BF Fairlane/LTD Geelong AFD 2024 ![]() 2002 XR8 pursuit 250 Custom twin 2.5" exhaust w Herrod modifed extractors, Tuned with Moates QH
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#14 | |||
Starter Motor
Join Date: Nov 2011
Posts: 11
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Quote:
I would like to know what Ford engineers have to say about this issue? cheers, Ray |
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#15 | ||
Regular Member
Join Date: Oct 2009
Posts: 131
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i have a 99 fairlane.. i have changed the air filter to a pod, have had the transmission serviced with a shift kit installed, changed the fuel filter and changed my diff fluid which i'd say hadn't been changed in a looooong time.... is it worth resetting after all this work? i'm also putting on a set of 18 inch rims..should i wait till these are on?
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#16 | |||
5.6L x 2 pilot
![]() ![]() Join Date: Dec 2009
Location: Canbra
Posts: 14,994
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Quote:
Gents, this thread should be called reset Long Term Fuel Trims, not reset ECU, as long term battery disconnection as far as I know only erases LTFTs (or KAM). I am happy to stand corrected by someone else more in the know.
__________________
2002 AU II LTD 5.6L 342ci T3 Short, AFR165 heads, Comp XE270HR-12 Cam, Brembo 4/4s(355/330), T3 5 spokes, LC-1 wideband, Whiteline HD swaybars, TCE 3K Hi Stall, PWR Auto Trans Cooler, Koni shocks, King Low Springs, Hurricane headers, 100 cpsi cats, Twin 2.5" exhaust. Quarter Mile: 13.73 @ 105.86mph Runner Up NA/DA to BF Fairlane/LTD Geelong AFD 2024 ![]() 2002 XR8 pursuit 250 Custom twin 2.5" exhaust w Herrod modifed extractors, Tuned with Moates QH
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#17 | |||
FF.Com.Au Hardcore
Join Date: Aug 2006
Location: Salamander Bay
Posts: 5,427
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it also resets learned transmission data and DTCs that may have been transient faults but remain active
Quote:
__________________
[SIGPIC][/SIGPIC]
Everyone starts off with a bag full of luck and an empty bag of experience. The trick is to fill the experience bag before the luck bag is empty. "It is better to remain silent and be thought a fool than to speak out and remove all doubt." Start a new career as a bus driver Rides: FG2 XR6 stock at this stage but a very nice ride xc 4 DOOR X CHASER 5.8 UNDER RESTO |
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#18 | |||
Regular Member
Join Date: Jul 2012
Posts: 108
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Quote:
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#19 | ||
Regular Member
Join Date: Oct 2009
Posts: 131
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before i changed the fuel filter the car was saying that that I'm using 14.2L per 100kms... if i reset the ecu do you know roughly how many i need to drive before it will give me a new accurate number?
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#20 | ||
Starter Motor
Join Date: Jul 2016
Posts: 3
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I havent been able to read all the comments, but what about te process in au3 xr6 manaul? all comments i seen seem to be auto related
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#21 | |||
Au Falcon = Mr Reliable
Join Date: Sep 2009
Location: North West Slopes & Plains NSW
Posts: 4,076
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Quote:
If you dont want to chance it, your ecu will still learn any new parts installed after a few days anyway. If you do put the new parts in, drive it in all variable conditions still - part to full throttle & air con on at idle & all through the rev range for a little period of time, your ecu will pick up the changes. Let us know how you go one way or the other, good luck!! cheers, Maka
__________________
Ford AU Series Magazine Scans Here - www.fordforums.com.au/photos/index.php?cat=2792 Proud owner of a optioned keeper S1 Tickford Falcon AU XR6 VCT - "it's actually a better-balanced car than the XR8, goes almost as hard and uses about two-thirds of the fuel" (Drive.com 2007) |
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#22 | ||
Regular Member
Join Date: Feb 2020
Posts: 36
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I have a BF XR6 and my ECU is over heating is there away to fix this? The problem i have is the only error code that comes up is P0420 for the catalyst. I also just newly bought a trans coolant box. I issue's are it drives good cold but when it gets to a certain heat it jumps in and out of limp mode and when that starts happening i go to stop (brake) and the engine stops. I restart the car it idles good put it in drive and it cuts out again. I did a test waited till this happened again and poored cold water on the ECU untill it was cold and the problem went away.
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