Electrical gremlins in my car ONLY at track days?!
Help, my car has a Gremlin and it is driving me mad!
Apologies for the big post, but I'd really appreciate any ideas. I'm not sure what is going on but only at track days I am getting the following problems:
Until today only the speedo has played up before and has caused the engine and other light mentioned above. I have a Hondata Flashpro fitted to the car and also a yellow box from having a 4.44 rear gearset fitted. I got the flashpro and yellow box at the same time and the problem has only been since they were fitted. With just the speedo problem I was thinking it was a yellow box problem. However with the fuel gauge and power cut starting today I am thinking it could be flashpro related. I tried clearing the code (P0720) at the track via the Torque app but it wouldn't go. At lunch after about a five minute rest it wouldn't clear. The speedo mucked up the whole way home including after stopping the car and switching off for petrol. I also switched off after each run throughout the day and that didn't help. Here is the interesting bit. I get home, leave the car turned off for 20mins whilst washing the wheels. Turn it back on and I can clear the code and CEL light! Speedo now works fine again. It as always F'ing does this when I get home! :banghead: Given this only happens at the track and does seem to sort itself out when home I have come up with some crack pot theories:
I've all this on video so I'll have to work on an edit to post up here. Thanks a lot if you made it this far :thumbup: PS I only drive the car a handful of times a month so perhaps not long enough/hard enough on road for it to rear its head but perhaps all these problems are always there, it just takes a days solid days driving to clock enough time up on the car for them to show themselves? |
I go with the Gremlin idear :ponder: .
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mmm, people getting this code with HOndata Kpro before
https://www.s2ki.com/s2000/topic/821...o-on-a-my2006/ Also looks like there is more than one way the yellow box could be wired up. https://www.s2ki.com/s2000/topic/815...elerates-slow/ https://www.s2ki.com/s2000/index.php...&f=22&t=119078 It has to be down to all this I reckon :ponder: |
Originally Posted by Kitesurfer s2000
(Post 21947118)
I go with the Gremlin idear :ponder: .
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Check your battery stays and connections for a starter.
Check all your earths in the engine bay too. |
That does sound weird, hope you still had a good day today though, its not much fun being at a trackday with a car that doesn't want to play :(
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From reading the other threads, it seemed the errors were more common when the yellowbox was wired up close to the ECU rather than taking the feed wire off the speed sensor on the transmission housing.
If i was guessing, i'd say that if you wired it close to the ECU you were somehow changing the resistance in the circuit by shortening the length of the cable and the ECU picks this up as a fault hence the limp mode situation either that or something in the yellowbox itself sends an incorrect signal when it's cable run to the ECU is decreased. |
Originally Posted by MB
(Post 21947225)
Check your battery stays and connections for a starter.
Check all your earths in the engine bay too. |
Originally Posted by unclefester
(Post 21947262)
From reading the other threads, it seemed the errors were more common when the yellowbox was wired up close to the ECU rather than taking the feed wire off the speed sensor on the transmission housing.
If i was guessing, i'd say that if you wired it close to the ECU you were somehow changing the resistance in the circuit by shortening the length of the cable and the ECU picks this up as a fault hence the limp mode situation either that or something in the yellowbox itself sends an incorrect signal when it's cable run to the ECU is decreased. |
Originally Posted by WinFreak
(Post 21947228)
That does sound weird, hope you still had a good day today though, its not much fun being at a trackday with a car that doesn't want to play :(
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