ECU Reset Question - Car is faster when battery has been off

[BRUN]

whenever i take the battery off my car to work on it, once i put it back on and go for a drive the car always feels faster, its a lot more responsive

after a days worth of driving though it goes back to normal, which, is fine, but id prefer it to be as responsive as it is when the battery has been off

why could this be ?

it is chipped would that have anything to do with it ?

[Lunner]

I ahve no idea......sorry :lol:

Would try it on mine, but then i woudl ahve to spend ages setting the bass etc up on my radio.....can't be without my music :D

[Andyvalver]

I think it might be just you mate, i cant see that changing the performace for a short time :?

[Plattsy]

doesnt the ECU kinda like learn itself how to run more economical? perhaps when you remove the battery it forgets how to run more economical? then it kinda learns or something like that?

[Chris H]

resetting the ecu makes it run at base factory settings, which are the peak of everything.

When anomilies are found during running then things adjust and normally if response is lost then somehtigns iffy somewhere.

All very exciting especially live testign with a scope to find that at a certain time the cts/lambda/whatever will give a dodgy output after 4 hours running which is what the problem is!

[BRUN]

well the CTS and Lambda are both new, though i havent reset it since i had the new lambda put on.......

[Martin]

The nana is the same bRUN the car got slower and slower though until I took the battery off for a few hours. Then it was much better!! Check out my before and after runs at york when I whipped the battery off after getting rubbish times....

10:16:24 RWYB CAR 0.00 0.684 2.445 9.518 76.180 14.703 93.280
10:32:35 RWYB CAR 0.00 0.911 2.470 9.551 76.130 14.744 92.960
10:55:27 C SS-CA 0.00 0.947 2.468 9.611 76.050 14.810 92.880
11:18:23 C SS-CA 0.00 0.912 2.362 10.352 55.450 19.169 46.610
11:53:41 C SS-CA 0.00 0.661 2.518 9.589 76.070 14.763 94.610
-----------------------------------------------------------------------------
13:56:33 C SS-CA 0.00 1.245 2.229 9.114 77.570 14.110 98.390
14:32:11 C SS-CA 0.00 1.360 2.414 9.340 78.110 14.340 97.640
15:43:47 RWYB CAR 0.00 1.019 2.419 0.067 0.000 14.366 96.970
15:53:32 RWYB CAR 0.00 0.773 2.320 9.155 79.550 14.108 98.480
16:03:06 RWYB CAR 0.00 0.903 2.319 9.174 79.740 14.138 97.950
16:08:13 RWYB CAR 0.00 0.951 2.311 9.167 79.700 14.131 98.120
16:12:35 RWYB CAR 0.00 1.312 2.306 9.235 78.900 14.208 98.570
16:23:40 RWYB CAR 0.00 0.775 2.361 9.255 79.430 14.231 97.850
16:27:17 RWYB CAR 0.00 1.220 2.464 9.364 79.360 14.302 99.340
16:32:03 RWYB CAR 0.00 1.246 2.358 9.216 79.820 14.156 99.020
16:35:51 RWYB CAR 0.00 1.164 2.458 9.377 79.690 14.334 98.950

[stew]

^^^Thats a healthy difference like! :? :?

[BRUN]

least its not just me then

i wonder what it is....

[BRUN]

Martin, has yours been ok since or did it go back slower again ?

i wish Nick Hill was closer as he's got the XR25 thing on a laptop

[Martin]

Ask Gaz fella.....when i had it if I left it for longer than 2-3weeks it would become noticeably slower....not sure whether Gaz is still having the same problem.

[BRUN]

thats what mines like

but, ive had a new lambda put on now so maybe it had a problem before and doesnt now, but needs a reset to relearn properly

i hope thats the case because its a totally different car and i want it that quick all the time