Emerald closed loop on narrow band

[steve-V8s]

Very new to this so still learning. Have the Emerald running, engine starts OK, got idle control OK but can’t seen to get it to go closed loop with a narrow band Lambda sensor. As far as I can see all the requirements are set for it to go closed loop but it doesn’t. Any tips anybody ?

[350Matt]

Not certain, but I think you need a wide band sensor and driver etc to make the closed loop work properly.

[Johno]

350Matt said:

Not certain, but I think you need a wide band sensor and driver etc to make the closed loop work properly.

Pretty sure Matt's spot on with that . . . I've got an LC1 which I wouldn't recommend to anyone, the common recommendation at the moment appears to be Dynojet's WB2, which is the next one to go into mine.

Drop Dave at Emerald an email, but quite sure you won't get it to work with narrowband and I'd also question why you'd want too ?

[steve-V8s]

The reason I planned to run a narrow band was purely to replicate the original arrangement of running closed loop at idle and low RPM for MOT. I had not understood enough about either the ECU or the sensors. Having spoken with Dave now it seems that I can use the narrow band as planned (you select simple O2 sensor) or I would probably get a more accurate result using a feed from the WB2 on one of the aux in pns. At the moment it is just driving an AFR meter.

[350Matt]

I would definitely go this route the simple o2 sensors are cheap rubbish

[steve-V8s]

I still can not get the unit to go into closed loop using a narrow band sensor.

On the Injection feedback tab I have selected Closed loop between 500 and 3000 RPM, at load sites 0 and 1. Sensor type is set to Simple O2, 5 seconds after start, 30secs warm up, above 60c, Decel and Accel sens 30, overrun 8

Yet in the live adjustments screen the status shows warm up and then open loop but will not show closed loop even when temp is above 60 and the other variable appear within range. What am I doing wrong ?

What settings do others have for closed loop or adaptive with either a narrow or wide band sensor ? I am a little confused about what the load and speed site integration settings do.

[Pupp]

When saving the settings back to the ECU, are you then turning the ign off/back on to 'set' it. Some Emerald config settings will drop out if you don't do this

[steve-V8s]

Pupp said:

When saving the settings back to the ECU, are you then turning the ign off/back on to 'set' it. Some Emerald config settings will drop out if you don't do this

Aha, there is an idea, I will try that.

[yzf1070]

I am curious to know how you have gotten on with the Emerald (I assume you are using the later K3 model)?
I had one fitted to my Tuscan S6 in November and all seemed to be ok during the cold months, however after a long time away I recently returned home for a brief spell and the car was an absolute pig to drive in traffic when warmed up. Fine once out of idle and cruise load sites but a sod to keep running in the Cambridge traffic. I took it back to Durham where it was originally set up and after 10 minutes on the RR they had it running a hell of a lot better when taken into traffic. In my car it seems the Emerald is incapable of coping with ambient air temp change on a boosted application. I also discovered that the Emerald recommended Audi EGT sensor does not work with the Emerald software. Emerald themselves confessed they have not een able to get this to work with a newly purchased device.
I have now dumped the Emerald and currently in the process of having a Link G4 Extreme fitted which onpaper at least, seems to be a far more capable piece of kit than the Emerald K3, but twice the cost. I would be interested to hear from anyone else who has used the Emerald and if their engine was force induction?

[steve-V8s]

In terms of drivability my setup with the Emerald is fine, in fact I would say excellent. That has however only been the case since Dave Walker tweaked the mapping. Drove the car to him with what was effectively the base map modified a bit by V8d. Before taking it to Dave I would say it was OK, after an hour or so on his RR it was superb. Nice smooth power delivery and very docile on a light throttle. Not really however a fair comparison with your application as a totally different engine. I (as most people seem to be ) was impressed with Dave’s obvious ability at understanding what the engine requires and also his concern for the engine during the mapping process.
My only problem at the moment is getting the unit to communicate reliably with the PC using a USB-RS232 converter. Not really the fault of the Emerald itself which works fine into a proper RS232 port. As soon as the engine runs noise appears on the RS232 which crashes all of the converters I have tried.

Yes it is a K3

[yzf1070]

Hi Steve,

Thanks for the response. I assume that your signal cable between the Emerald and the laptop is not running anywhere near the HT leads or an electric motor? I used the Emerald supplied USB/serial convertor and cable with a Sony Vaio and had absolutely no problems at all. I mounted my Emerald in the car just behind the dash away from all other electrical equipment.
At least you are happy with the way the car runs, thats good news at least.

I have switched the manifold air temp sensor for a hot wire which is a faster acting device, the Emerald is out and the Link G4 X going in. Hopefully will have feedback on progress in a couple weeks or so.

Cheers

[spitfire4v8]

yzf1070 said:

I would be interested to hear from anyone else who has used the Emerald and if their engine was force induction?

We use emerald on the 380hp twin turbo engine in the T350 (and in the old tasmin) with no problems.

[yzf1070]

spitfire4v8 said:

yzf1070 said:

I would be interested to hear from anyone else who has used the Emerald and if their engine was force induction?

We use emerald on the 380hp twin turbo engine in the T350 (and in the old tasmin) with no problems.

Hi there thanks for the feedback... what type of air inlet temp sensor are you using please and do you use the car for track or general daily use, or both for that matter?

Cheers

G

[spitfire4v8]

I use the emerald supplied air temp sensor .. car used just for racing, so gets VERY hot! car starts from cold perfectly, good manners always, also restarts from hot with good manners also. In short : cannot be faulted

[convert]

steve-V8s said:

In terms of drivability my setup with the Emerald is fine, in fact I would say excellent. That has however only been the case since Dave Walker tweaked the mapping. Drove the car to him with what was effectively the base map modified a bit by V8d. Before taking it to Dave I would say it was OK, after an hour or so on his RR it was superb. Nice smooth power delivery and very docile on a light throttle. Not really however a fair comparison with your application as a totally different engine. I (as most people seem to be ) was impressed with Dave’s obvious ability at understanding what the engine requires and also his concern for the engine during the mapping process.
My only problem at the moment is getting the unit to communicate reliably with the PC using a USB-RS232 converter. Not really the fault of the Emerald itself which works fine into a proper RS232 port. As soon as the engine runs noise appears on the RS232 which crashes all of the converters I have tried.

Yes it is a K3

Steve, We use quite a lot of data loggers at work, and have found that USB to RS232 adapters to be pretty poor.

We have had a lot of success with PCMCIA to RS232 adapters though, in particular the StarTech ones.

http://www.startech.com/item/EC1S950-1-Port-16C950...

[steve-V8s]

Yes I have a PCIMCA card but the net book I want to use doesn't have a slot.

[blitzracing]

Might be worth trying a ferrite ring on the RS232 cable as these can reduce high frequency spikes.

http://www.maplin.co.uk/Search.aspx?criteria=ferri...