Bottrill Posted February 17, 2018 Share Posted February 17, 2018 Evening, All Hopefully a simple one... When I start the car the speedo bounces and then hesitates, often sticking at around 60mph for a few seconds whilst I'm sat on the drive. Once I pull off all seems normal. I've tried using the search but I'm hoping someone can point me in a more specific direction. I've heard an "Earth mod" mentioned a few times? It's a 2003 R300. Thanks, Lee Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted February 17, 2018 Member Share Posted February 17, 2018 What sort of system: mechanical from the gearbox, electronic from a wheel. electronic from the gearbox?What sort of dash?Jonathan Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted February 17, 2018 Member Share Posted February 17, 2018 Duplicate post. Link to comment Share on other sites More sharing options...
Bottrill Posted February 17, 2018 Author Share Posted February 17, 2018 Hi Jonathan,I was hoping the answer to that question would be a year cut off/switch over point? I'm embarrassed to say, I'm not 100% sure. I will check in the morning. Gauges wise, it has the factory yellow Caterham analogue setup.Lee Link to comment Share on other sites More sharing options...
Bottrill Posted February 18, 2018 Author Share Posted February 18, 2018 Hi,Definitely nothing on the rear wheel hub. Gearbox however shows this...http://i3.photobucket.com/albums/y82/c0151198/IMG_9030.jpghttp://i3.photobucket.com/albums/y82/c0151198/IMG_9035.jpghttp://s3.photobucket.com/user/c0151198/media/IMG_9030.jpgIt has the Caterham 6 speed box. Im unsure what that is in the last photo but there is a bit of movement/play. Is this normal?Thanks,Lee Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted February 18, 2018 Member Share Posted February 18, 2018 That's electronic off the gearbox. All of the parts are replaceable or repairable.Traditional round instrument with needle?When I start the car the speedo bounces and then hesitates, often sticking at around 60mph for a few seconds whilst I'm sat on the drive. Once I pull off all seems normal.All other gauges behaving fine?I'm guessing but that sounds most likely to be a fault in the instrument, except for:... there is a bit of movement/play. Is this normal?If it's like the mechanical angle drive it can be difficult to snug up on the thread but after it's up I wouldn't expect any play. See if you can tighten the collar.Then I'd inspect, disconnect, clean and reconnect all of the electrical connections you can spot, both there and at the instrument.And after that if it works the rest of the time I'd stop there until it got worse. Then I'd send the instrument to John Ostick for testing.Jonathan Link to comment Share on other sites More sharing options...
Bottrill Posted February 18, 2018 Author Share Posted February 18, 2018 That's great, thanks Jonathan. Yes all other gauges are fine. Yes it has the traditional round gauge with needle and electronic mileage reading.could you explain what that second picture actually is? Can I do any of it any harm trying to tighten it up or cleaning the contacts of the connectors you see in the photos? I'm assuming the digital mileage reading is stored in the speedo? Sorry for the basic questions.Lee Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted February 18, 2018 Member Share Posted February 18, 2018 I'm assuming the digital mileage reading is stored in the speedo? That's what I'd assume too. (I don't know if the value can be tweaked when repairing or replacing, John Ostick would.)Can I do any of it any harm trying to tighten it up or cleaning the contacts of the connectors you see in the photos? With reasonable gentleness I doubt it. :-)Jonathan Link to comment Share on other sites More sharing options...
Gary Stone Posted February 19, 2018 Share Posted February 19, 2018 The cable angle drive from the gear box to speedo probably broken. I had to replace mine last year. Speedo needle was bouncing around. Link to comment Share on other sites More sharing options...
John Vine Posted February 19, 2018 Share Posted February 19, 2018 I'm getting this image instead of your photos:I've never seen that before. Any idea what it means?JV Link to comment Share on other sites More sharing options...
Leadership Team Toughie Posted February 19, 2018 Leadership Team Share Posted February 19, 2018 I'm getting the same image. I don't think its the bouncing speedo, 'coz its steady at 100! Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted February 20, 2018 Member Share Posted February 20, 2018 Me too. I've seen that before, and several times with images that used to show correctly. I suspect it's something to do with permissions on the server.Lee: Do they still show normally to you?Jonathan Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted February 20, 2018 Member Share Posted February 20, 2018 The cable angle drive from the gear box to speedo probably broken. I had to replace mine last year. Speedo needle was bouncing around.Mechanical rotating or electrical cable?Jonathan Link to comment Share on other sites More sharing options...
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