CAJ Innovations Forums - Help set up, are readings OK

Bobd

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Re: Help set up, are readings OK
Reply #15 - 03/06/12 at 09:01:58

My mistake, I am in fact using v1.51. I had been reading the website and remembered the wrong number.

With regard to the THR and Throttle slider displays.
I understand the TPS output is displayed under the Throttle slider display and is the figure to be edited by wordpad in the *.ecu file, and I read in the Ecu Controller Owners Manual that the THR display is a map index. I am a little unsure about this 'map index', my display is 0.80, your example shows 2.81. Can you explain this in more detail please and advise when I use these figures.

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Re: Help set up, are readings OK
Reply #16 - 03/06/12 at 09:09:13

If you have properly set the TPS base, you should see 0.0 when there is no throttle applied. If you open the throttle to match that of the 2nd row throttle position you will get 1.0

0.8 is just below the 2nd row, so in your case either you have some throttle applied ( or fast idle ) or your TPS base is not correctly set.

You mentioned the Optimiser said 101 before and was advised to set 100. Why is it 128 now?

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« Last Edit: 03/06/12 at 09:14:03 by YaBB Administrator »

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Bobd

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Re: Help set up, are readings OK
Reply #17 - 03/06/12 at 09:45:17

Not sure why TPS has changed, it seems to wander a bit for instance WOT changes by about 25 to 30 , I sometimes do things with an Optimate Battery charger connected, this is one of those chargers you leave the bike connected to when parked up. Is it possible the varying battery voltages on/off charge are having an effect? At the moment C6 is removed.

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YaBB Administrator YaBB Administrator Offline I love YaBB! Posts: 679 The Land of YaBB	Re: Help set up, are readings OK Reply #18 - 03/06/12 at 10:37:07 I would expect very little variation. For one the ECU has a 5V regulator which should be immune to such changes and secondly the TPS sits on the same voltage as the chip
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Bobd Full Member Offline I am slowly developing a relationship with MyEcu. Posts: 150 Southampton Gender:	Re: Help set up, are readings OK Reply #19 - 03/06/12 at 17:47:26 OK thanks, I will try refitting the IAW15M and closely monitoring the TPS output, it may be I need a new TPS. I am so happy the bike starts with the My15M and answers the throttle. I am sure I am very close to a test ride once I have a stable TPS output and have set up the basic idle settings.
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Mad Farquhar

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Re: Help set up, are readings OK
Reply #20 - 03/07/12 at 07:13:08

If TPS worked previously on original ecu why do you need to change it? The range is broadly correct and you can set up the matrix to reflect the mapping points within. I may be writing crap but getting a new TPS at this stage seems profligate. My TPS signal varies with engine running and not running - well "idle" does. There seems to be about 100mV (ECU ~ 19) difference between what I call idle dead (battery) and idle running (generating). Maybees I have problem?

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Rat Patrol Junior Member Offline I love MyECU! Posts: 53	Re: Help set up, are readings OK Reply #21 - 03/07/12 at 11:02:01 I'll have to admit that I've never fussed about the TPS reading. I initially saw that it was in the acceptable range and just ignored it ever since. Bike's running well. Is it possible to worry too much about this? pete
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raz

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Re: Help set up, are readings OK
Reply #22 - 03/07/12 at 11:30:34

Mad Farquhar wrote on 03/07/12 at 07:13:08:

My TPS signal varies with engine running and not running - well "idle" does. There seems to be about 100mV (ECU ~ 19) difference between what I call idle dead (battery) and idle running (generating). Maybees I have problem?

No problem. Just set the TPS figure at the running figure. I got a little less variation after doing a (little) overhaul of the butterfly shafts: New seals and replaced that plastic joint with a metal one (from a Volvo P1800 Cool

). The soft bearings for the spindles go oval.

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1100 Sport iniezione elettronica -- the perfect merge of a superbike and a steam train

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Bobd Full Member Offline I am slowly developing a relationship with MyEcu. Posts: 150 Southampton Gender:	Re: Help set up, are readings OK Reply #23 - 03/07/12 at 22:48:58 I wonder if the TPS is temperature sensitive, seems rise as I have the engine idling while waiting for it to warm up.
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Mad Farquhar

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Re: Help set up, are readings OKraz
Reply #24 - 03/07/12 at 23:34:45

Raz has reassured me about my idle. I remember he described that before somewhere. Think Carl A mentioned throttle seals too somewhere / sometime.
I wont lose any sleep over it as Pete said. Ill PM my phone number if you want. We can have a chat - maybe next week when I am not working?

Raz - you do have an eclectic choice in vehicles! A P1800 - you petrol head you! Wink

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« Last Edit: 03/08/12 at 03:09:33 by Mad Farquhar »

MG Sport 1100 inj
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raz Senior Member Offline Guzzi 11OO Sport, My16MkV, Innovate LC-1 Posts: 373 Stockholm, Sweden Gender:	Re: Help set up, are readings OKraz Reply #25 - 03/08/12 at 07:27:43 Mad Farquhar wrote on 03/07/12 at 23:34:45: Raz - you do have an eclectic choice in vehicles! A P1800 - you petrol head you! Aye, and I am sure this joint will outlast any other part of the entire bike!
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Mad Farquhar Full Member Offline Slainthe mhath Posts: 171 Black Isle, Scotland Gender:	Re: Help set up, are readings OK Reply #26 - 03/08/12 at 07:42:52 Swedish steel - say no more!
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Re: Help set up, are readings OK
Reply #27 - 03/08/12 at 07:48:07

The most probable explanation of TPS variation is mechanical. For instance on my Sport Corsa the throttle cable goes to the LH throttle body. There is then a linkage across to the RH throttle body where the TPS sits.
Now add wear and tear, temperature change and the pulsing vacuum on the butterfly valves and you have plenty of reasons why there is a variation between engine running and not.

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Mad Farquhar

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Re: Help set up, are readings OK
Reply #28 - 03/08/12 at 08:21:46

Yup agreed. Originally like Bob (I think) I put it down to variation in voltage (stopped v. running) but your explanation of MyECU voltage regulation indicates that Razs experience of mech wear & tear in TBs plus the inter-linkages you mention all conspire to give that differential but hey..it doesn't stop the massive grin or the fun in tinkering to get it "going much better". I suppose it depends on the price of the anorak (refer Wiki slang if not familiar) you want to wear

.

Talking of drift:http://youtu.be/Te0V71sGoxA - love the RC car and helo!

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« Last Edit: 03/08/12 at 08:52:49 by Mad Farquhar »

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Bobd

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Re: Help set up, are readings OK
Reply #29 - 03/08/12 at 09:50:02

So the only 'real' TPS value is with a warm running engine, and I gather not terribly important in practice. I have been paying too much heed to Cliff's comments in the 'First Steps' where he states the whole tuning process depends on an accurately set idle.

The bike now starts and I am playing with the mixture settings at the moment. I think I may dig out my vacuum gauges to ensure the low range balance is OK.

I am a little uncertain about setting the throttle body airbleed screws, am I right in thinking they allow extra air through an almost closed throttle body to correct the balance or are they affecting the mixture - or both?

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