Reset ECU

[Crash Lander]

How do I reset the ECU? I'm thinking that reseting it may help my rough idle issue.

[XR6-VCT-2000]

Originally Posted by Crash Lander

How do I reset the ECU? I'm thinking that reseting it may help my rough idle issue.

It's just a matter of disconnecting the battery for a while really , and a few other things if u want ( but the car learns the other things gradually anyway ) . There is plenty of info on this topic in the 'Technical Recources' , cheers .

By the way , i haven't seen you post here before ( although it's your 6th post now ) , welcome to the ford forums mate .

[Crash Lander]

Thanks! Just got an AU 1 on Monday, so made this my new home.
Just noticed I'm a starter motor! It's nice to be useful! :-)

[XR6-VCT-2000]

congrads , get ready to empty your wallet to the mod bug ( a serious disease that is caught in here ..lol ) any pics of your car ?

[Crash Lander]

took some pics the other day so dad could see it. (he lives interstate.)
It's just a bog standard dark blue AU series 1 Forte. Complete with car door and shopping trolley dings and scratches. It's by no means in fantastic shape. I'll post the pics if you want, but it's nothing flash I promise!
I'd love to catch the mod bug, but a wife and 2 small kids keep my ever opened wallet rather empty. Any spare cash is getting saved for flying lessons, but even that's been put on hold, because I have to use what I had saved to buy this AU!
I do like it though.

There's a small tear (more like a worn out seam) on the drivers seat, and the lid of the centre console is broken at the hinge, so thjose are the things I'll get fixed first when funds and time allows.

I have done one mod already though!
When I went and bought the new set of leads to try and fix the rough idle (which it had no effect on) I bought a steering wheel cover that looks like one of those flash polished wood steering wheels! :sm_headba :sm_headba

[GK]

Here you go! This was originally posted by LG.

PROCEDURE:
Disconnect the battery (Take off the positive terminal lead) for approx 40minutes to 1 hour.

Once reconnected do the following:

AUTO Transmission:

- Start car and idle in this sequence?
- 2 minutes idling with the transmission in drive and A/C on.
- 2 minutes idling with the transmission in drive and A/C off.
- 2 minutes idling with the transmission in neutral and A/C on.
- 2 minutes idling with the transmission in neutral and A/C off.
- Drive the car on the road, for at least 5 minutes under variable throttle positions.

MANUAL Transmission:

- Same as above, except put the transmission in gear for (drive).

All the best with it.

GK

[frvellm1]

Originally Posted by GK

Here you go! This was originally posted by LG.

PROCEDURE:
Disconnect the battery (Take off the positive terminal lead) for approx 40minutes to 1 hour.

Once reconnected do the following:

AUTO Transmission:

- Start car and idle in this sequence?
- 2 minutes idling with the transmission in drive and A/C on.
- 2 minutes idling with the transmission in drive and A/C off.
- 2 minutes idling with the transmission in neutral and A/C on.
- 2 minutes idling with the transmission in neutral and A/C off.
- Drive the car on the road, for at least 5 minutes under variable throttle positions.

MANUAL Transmission:

- Same as above, except put the transmission in gear for (drive).

All the best with it.

GK

Hi Guys, a friend of mine has a AU III V8 Manual with cam and exhaust that is hunting at idle when the AC is on. Idles fine (is cammy though) with AC off. I was thinking we should try the above ecu reset but dont understand how to do it for a manual.

I am assuming the first two steps for an auto should be done stationary (Transmission in drive with the foot on the brake) but in a manual thats not going to work. (In gear with the foot on the brake)

Hence can anyone confirm the right steps for a manual and if there is anything else we should be looking at?

Thanks guys.

[Crash Lander]

Thanks GK! Printed out, and will do it in the morning! I was just going to whack the battery in, and drive off! Thanks again.

[BMeyer]

Originally Posted by Crash Lander

How do I reset the ECU? I'm thinking that reseting it may help my rough idle issue.

If you are also having a jerky problem when driving on a very light to nil throttle at slow speed, I'd suggest it might be time to replace the Oxygen sensor. They need replacing every 100,000.

[NCII40]

When the AC Compressor Kicks in, the ECU should automatically adjust the idle to compensate for the extra load,



Having a cam installed, it may be just be Freaking Out !



Or it could be something inside the compressor





*Call an AC guy out to check compressor



** take it back to the tuner and reconfigure the idle with AC on

[frvellm1]

Thanks.

Before I do though i want to eliminate some variables first.

It idles ok with the cam with AC off so should do so with it on. So don’t think it’s the tune/cam.

Base idle may not be right (what rpm is right for a manual v8?

Would like to reset the ecu too but want to verify the procedure for a manual.

Appreciate the help and hope all enjoy their Easter!

[Strattos]

Has the hunting with air-con on only started since the cam/tune was done? If so I'd agree with NC11 - it's most likely the tune.

Or was everything ok and then it started this issue all of a sudden?

I had the same issue you're describing (idle fine with air-con off, but hunted like mad with the extra load of the air-con) with an early tune on my ute before having the tune modified. Instantly fixed it.

[frvellm1]

Good question.

Car was bought with the issue so when the symptoms first started is hard to say. In theory the tune is via a unichip but haven’t located it. Dosnt appear to be in the lower left kick panel. Ideally would like to locate it and isolate it.

Any ideas?

Knowing the procedure for an ecu reset on a manual is also appreciated as per my query above.

Thanks All.