CSR 260 misfire

[CSR7 Hillclimber]

Anyone any idea how to avoid plugs fouling upon start-up after a period with little use ? Despite 3rd update of map, it still over-fuels on start-up.

I have been advised to try disconnecting the crank sensor and hence the fuelling and turn engine over to get oil pressure and some oil in the bores etc before start up.

This is somewhat inconvenient - anyone any ideas on wiring a dash switch to cut the fuelling- or better still how to avoid this misfiring ?

 

CSR7 hillclimber

[paul jacobs]

It sounds like it's time to get your ECU remapped for the car, or plug in a completely new ECU and map. I went for an Omex unit and have been happy ever since. It really is beyond me why CC have so much trouble with their mapping? 😔

 

Paul J.

 

 

Edited by - Paul Jacobs on 19 Apr 2010 20:18:32

[Billyboy]

Found a crack in a plugs ceramic outer insulation

 

Edited by - Billyboy on 20 Apr 2010 13:40:51

[charlie_pank]

Is it possible to look at the map? The one I had on my Emerald had a special spot at 0-500 rpm/100% throttle with 0 fuel so that I could clear it if it ever flooded by turning it over at WOT. Apparently it's quite a common thing to put in a map.

 

back here because I want to be.

[P W]

Never had a problem with mine. I just jump in and start it with no throttle, I let the ECU decide what happens. If I touch the throttle immediately after starting it will idle rough, but if I leave it to itself for a couple of minutes it's fine. Never had a problem with fouling, it's on the revised Caterham map that is supposed to improve light thortle response (reduce kangarooing)

[paul jacobs]

I have a feeling that even the upgraded CC map seems to run very rich at tickover and low revs. Certainly judging by the black smoke it looks over rich. I haven't noticed that at all since I had Omex remap mine using one of their ECUs. It isn't a cheap option, but it cerainly works fine, plus they found another few GeeGees somewhere, it's now up to 269bhp, [not that I have noticed the extra power, mind you ]

 

Paul J.

 

[Slipper man]

I had a similar problem with the map on my R500. Caterham had a number of goes at it, but I eventually went to Steve Greenald who fixed it for me. It was £400, but well worth it. I think mapping is a specialist function, which needs a specialist to do it well.

 

I am not sure if it is still the case, but in 2001, the engine builders were responsible for the full throttle/ higher revs mapping and Caterham did the low throttle/ low revs mapping. I guess they want to play safe with the start up maps, leading to them running rich when cold.

[CSR7 Hillclimber]

Thanks everyone.

The Omex seems a good option. Paul, who did you use to fit yours - or is it now available fully mapped for me to fit myself ?

 

CSR7 hillclimber

[paul jacobs]

Omex did mine, they are in Cheltenham, and they used my car as the mule, so to speak, so they can now sell a complete, mapped ECU and harness adapter, so you can just swap over the ECU and it is a plug and play operation and it runs properly straight off. If you then want any more tweaks on the rollers, they are able to do this. The Omex unit also has the benefit of being adjustable from an included program, which you can download from the Omex website. I don't know their URL offhand, just google them though. Best of luck.

 

Paul J.

 

[CSR7 Hillclimber]

Thanks Paul. I used to meet Richard from Omex at hillclimbs, so will phone him.

 

CSR7 hillclimber

[duffield]

My CSR was not good when I got it, It has also had a problem with the immobalizer that cases the engine to Cough at high load at high rev's in a high gear. However Steve Greenald is the man for mapping the std CSR 260 on the original MBE ECU. Just make sure before you map it it is getting full throttle, I know of 3 that was not and mine was not.

 

Andrew

 

AJDuffield

[weeman]

It really is beyond me why CC have so much trouble with their mapping?

Paul , having recently spoken at length, to the 'Two Steves', it seems to me; the problem CC have with mapping is that they use 'generic' maps as opposed to maps that are tailored to a specific engine. This is very much a trial and error method, but unless CC invest in a good quality rolling road set up and the skills required to operate it, it's their only option.

This is why so many people have numerous trips to the factory where CC simply load a new map and hope for the best.

Of course, CC could include the cost of a visit to someone like 'Track n Road’ in the price of a new car. To my way of thinking that would be a very worthwhile 'extra'.

I wrongly thought that if a map was created for an engine type, then all said engines would run identically. However the tolerances, parameters and variables from engine to engine are sufficient that the maps have to be bespoke.

I also learnt that there's very little to choose between different ECU's. The critical factors are the quality of the rolling road and its software along with the 'tuners' skill at disseminating the information he/she reads.

 

I shall always be greatful to the Two Steves' for the magic they performed on my car.

 

_________________________

Be Lucky!!

 

Martin

(Solent Se7ens) M7

[charlie_pank]

As I understand it the ignition mapping is rarely changed for a given engine configuration. Therefore if CC were to include their 'best guess' map plus a wideband lambda probe then the ECU could be set to self-map for fuel: end of problem.

 

back here because I want to be.