33 replies to this topic

[Firthy]

Quick question to the OBD tuner users out there... I have just carried out my first log and I've sent it to Peter to do some checks. Providing I get the green light I'm hoping to do my first fuel learn this week... Do you have any tips for me in terms of how to carry out the best fuel learn. I heard motorway is ideal, 3rd gear, how long should I drive for? Does the ground need to be as flat as possible I.e no hills? Is it a good idea to do low rpm first then high? Do you need to hold the engine at certain revs Just looking for any tips from the experienced ..... Martins mini guide has already been useful Firthy

[Strugs]

I did mine in with Chill on general roads, most gears, all revs - low then high.. just chasing the EML light..  I did have Chill with me though so that probably made it a lot easier! He's definitely a good man to advise you!

[Captain Vimes]

Just drive and watch the eml. Pretty obvious when you get out there. Full throttle and full load is easy to nail. Part throttle and low load likewise. It's the off diagonals on the map that are tough. You end up driving at part throttle with 5k rpm. Speeding up a little and slowing down a little. The key is to find the right roads! Avoid motorways and towns! The interpolation is pretty good though so don't worry if eml is still coming on occasionally.

[fezzasus]

For fuel learn you want varied roads. Try to avoid keeping it at constant throttle for prolonged periods of time (much longer than it takes for the EML light to go out). Remember you can do this in stages, for the first fuel learn session you might want to do it for only 10 mins or so, review data (maybe practicing processing it) then go again.

[leevx2.2]

Think of it as a game buy trying to keep the light on 😉

[FLD]

Think of it as a game buy trying to keep the light on 😉

This! You are trying to hit all load sites. Up and down the gears straining it and letting it rev freely.

[Nev]

You could consider renting an hour on a dyno for £50 or so. Far faster and easier without having to turn the steering wheel and cater for traffic.

 

[FLD]

It doesn't work on a dyno Nev. There's some protection features in the ecu which kick in on the dyno with the basic Dutch. I tried it! It works on the rollers but you end up lean when you roll out. Fuel learn has to be done on the road. I believe pro enables you to switch these off. I will be going pro after the national as the basic one get frustrating fast. (It is good for what it was intended)

[Firthy]

Thanks Guys perfect

[Raptor]

It doesn't work on a dyno Nev. There's some protection features in the ecu which kick in on the dyno with the basic Dutch.

Lol was it written by Volkswagen?

[MartinS]

Do it in short bursts, maybe 20 mins max then save. I had many a journey (over 10) where you would get to the end , it would lock up and you would have driven 30 miles or more for nothing.

It often locked up if you tried to look at the learning levels (the amount of green area etc) as Im would do that to see what percentage adjustmnets had been done. Don't be tempted, do it later.

 

I also later did ignition learn and that was very good and works using the same method as fuel learn, and following guidance on how to check for knock in the numbers after, that really helped smooth out the ignition.

 

Martin S

 

[oakmere]

I have never had a problem with the PC locking up but use an old XP netbook. All fuel learn data is stored in the ECU during the fuel learn not on the lap top and will only be lost if you switch the engine off. So if you have a PC problem it is not a problem to switch off the PC then reconnect and read ECU to PC. Don't panic and switch the engine off if having PC problems.

[Firthy]

Thanks everyone for the info especially the ignition info Martin.

 

I know Chilli talked about doing:

 

 1 x Fuel learn then 1 x Ignition learn followed by 1 x fuel learn then 1 x ignition learn again.

 

I'm a little worried the car will produce over 250bhp so I don't want to advance the ignition... to be honest it feels fast enough on the base map.

 

Does that mean i will only need to do one fuel learn and then one ignition learn. If I'm not advancing the timing or is it good practice to do it twice anyway?

 

Firthy

 

 

Edited by Firthy, 05 July 2017 - 03:43 PM.

[CHILL Gone DUTCH]

are you happy with how smooth it is 

ignition is about a lot more than just power 

 

i personally do the ignition manually rather than the learn feature, 

[Firthy]

are you happy with how smooth it is 

ignition is about a lot more than just power 

 

i personally do the ignition manually rather than the learn feature, 

 

Hi Chilli,

 

I literally don't have a clue what I'm doing (learning on the job) so as you say probably best to do a fuel learn first. Then a ignition learn then let someone check if it looks okay?

 

I'm trying to do a track day on Monday, Peter has checked my log and he's happy with it so I'm just trying to get the mapping to a place where its safe to use

 

I'm only revving to 6200 so I think I should be safe power wise

Edited by Firthy, 05 July 2017 - 04:51 PM.

[FLD]

  i personally do the ignition manually rather than the learn feature, 

The learn feature is very conservative (rightly so) so doing it manually (fnaar) is much better imo

[Firthy]

Cool so probably best to just do the fuel learn and leave it there?

 

There is no way I have the skills to do the ignition manually

Edited by Firthy, 05 July 2017 - 04:53 PM.

[CHILL Gone DUTCH]

yep will be perfectly ok 

 

[Captain Vimes]

The base map from Peter is pretty good. Mine has changed very little after hours of playing with fuel and ignition.

[smiley]

With the basemap and the stock 3.35mm pully you should allready be close to 250 which is where most want to be. That leaves mostly fuel sessions and knock removal.