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post #1 of 11 (permalink) Old 09-17-2019, 10:35 AM Thread Starter
Minitwins
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Tune ECU

Having had some grief from my 02 Daytona, I plugged in TuneECU and had a look to see if I could find the problem.
There were a bunch of error codes, which I cleared, shut down, restarted and some other faults came up.
The number of my current map (which Triumph installed years ago) was the same as the one on TuneECU's website.
I flashed the downloaded one to the ECU, then discovered that the battery wasn't charging correctly, which I traced to a faulty stator.

Anyway, one thing I have noticed is that the TPS only goes upto about 65%. Is this correct or should it go to 100%?
I guess that once is is past 50% the ECU doesn't adjust anything anyway, so I guess going over 50% is irrelevant?

Well impressed with TuneECU as a program, so easy to use and the plugs are soo cheap.
Would have cost me about that in fuel to take it into my local Triumph dealer and that's before they charge me a fortune just to plug it in.
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post #2 of 11 (permalink) Old 09-17-2019, 05:58 PM
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Although I haven't got any direct experience with your bike I'm pretty sure the TPS Reading should go all the way up to 100% when the throttle is fully turned. What's the Reading with the throttle at the rest position?
Try a TPS reset which can be done via tune ECU, this resets the zero position with the throttle at rest, if it's still only reads up to 65% then you need to check if your throttle bodies are actually fully opening, if they aren't adjust the cables, if they are you possibly have a faulty TPS.
What were the error codes, anything related to the the TPS?
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post #3 of 11 (permalink) Old 09-18-2019, 08:37 AM Thread Starter
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Hi Scotty,

The first codes were based around ignition coils short circuit to battery or over temperature, ignition coil circuit malfunction, cooling fan open circuit or short circuit to ground, system voltage high and oxygen sensor heater circuit malfunction, so nothing to do with TPS.
The second round of faults were fuel pump relay default and fuel pump relay open circuit or short to ground.
I had replaced the engine with a used one (due to the crank snapping), which turned out to have no second gear. I rebuilt my old engine and put that back in, so the fault codes could be from some point during the seaps.
The throttle position at rest is 0 and the butterflies open fully.
I have reset the TPS and it still reads 65%.
Doesn't seem to make a difference to performance, so will use it for a while and see if any other faults pop up.
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post #4 of 11 (permalink) Old 09-18-2019, 10:49 AM
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You were playing it down a bit when you said you'd had some grief
You're right most if not all of the codes were probably when you were swapping things over, if the ECU has had power applied while components were disconnected.
The TPS is a weird one though, maybe it is different than the bikes I'm used to, hopefully somebody with the same bike can check theirs on Tuneecu and give you a definitive answer.
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post #5 of 11 (permalink) Old 09-18-2019, 10:54 AM
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TPS does not show 100%. Your number is normal.
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post #6 of 11 (permalink) Old 09-18-2019, 05:02 PM
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Quote:
Originally Posted by Felony View Post
TPS does not show 100%. Your number is normal.
Thanks for the confirmation, I know my two bikes range from 0 to 100% and it does sound the most logical Reading but thinking about it if the OP's TPS was reading 65 when it should be reading 100% it's unlikely the bike would be running properly.
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post #7 of 11 (permalink) Old 09-18-2019, 05:10 PM
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I'm no expert but I understand that it never reaches 100%
and that 65 / 70 is a maximum that we should expect to see.
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post #8 of 11 (permalink) Old 09-18-2019, 05:45 PM
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I think that if you switch screens on TuneECU, maybe the Map screen and roll on the throttle, you will see 100% at the top of the table. But, not for normal TPS.
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post #9 of 11 (permalink) Old 09-19-2019, 05:34 AM Thread Starter
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Quote:
Originally Posted by Scottty View Post
You were playing it down a bit when you said you'd had some grief
You're right most if not all of the codes were probably when you were swapping things over, if the ECU has had power applied while components were disconnected.
The TPS is a weird one though, maybe it is different than the bikes I'm used to, hopefully somebody with the same bike can check theirs on Tuneecu and give you a definitive answer.
In 15 years of ownership the Daytona has only let me down once, which was down to the Reglator rectifier, then the crank **** itslef.
Since sorting the engine, there have been numerous niggles, which I hope I have now got on top of.

I will re-check the TPS reading when I get a chance and have a look on the other pages in TuneECU to see if they give a different reading.

Thanks for you help and comments guys.
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post #10 of 11 (permalink) Old 09-20-2019, 05:58 PM
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The TPS % reading is not the degree of butterfly open angle. It relates to the % of the voltage range being used at WOT.

cheers,

Phil
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