gaxor Posted October 2, 2022 Share Posted October 2, 2022 Loving this snagging, I guess everyone has a few issues on the first home buildFurther to a couple of issues posted earlier,I now find that the rev counter only reads up to about 1000 rpm despite the actual engine rpm. It's almost like it is reading 1/10 of actual rpm. Any ideas?? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted October 2, 2022 Member Share Posted October 2, 2022 Does the indication move at all when you blip the throttle?Does it drop to zero with the ignition on and the engine stopped?All other instruments now OK and the instrument lights working?...There's not much that you can adjust... check the connections on the instrument and to the ECU.Jonathan Link to comment Share on other sites More sharing options...
Gridgway Posted October 2, 2022 Share Posted October 2, 2022 Is it configurable in any way?PS I hope it's not reading a tenth of the revs if you've seen it at 1,000 rpm Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted October 2, 2022 Member Share Posted October 2, 2022 Some have switches that allow setting for number of cylinders and whether there is lost spark ignition. These are often inline switches on the back of the instrument.If that is the problem then the indication will blip up and down nicely even though the numbers are wrong.Jonathan Link to comment Share on other sites More sharing options...
Gridgway Posted October 2, 2022 Share Posted October 2, 2022 I thought from the description it did move, but only up to 1000 or so rpm. If there were some errors in the setup (set for lost spark when it's not, 16 cylinders rather than 4) you could get to reading an 8th of the actual revs maybe? Link to comment Share on other sites More sharing options...
gaxor Posted October 2, 2022 Author Share Posted October 2, 2022 Yes the needle does move when you blip the throttle, but only within the 1st 1000 rpmall other instruments are now working ok Link to comment Share on other sites More sharing options...
Gridgway Posted October 2, 2022 Share Posted October 2, 2022 It's either configured wrongly or broken I reckon! Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted October 2, 2022 Member Share Posted October 2, 2022 Please can you add photos of the face (to identify the type) and the rear (so that we can look for switches and settings).ThanksJonathan Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted October 3, 2022 Leadership Team Share Posted October 3, 2022 If this is a new build and there's nothing in the build manual about changing any settings, personally I'd contact Caterham about the issue. Link to comment Share on other sites More sharing options...
John Vine Posted October 3, 2022 Share Posted October 3, 2022 What model are we discussing here, please?JV Link to comment Share on other sites More sharing options...
John Vine Posted October 3, 2022 Share Posted October 3, 2022 Ah, from your other thread (re electrical gremlins) it's a 360S.It would be worth checking whether your loom has the pull-up resistor fitted: JV Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted October 3, 2022 Member Share Posted October 3, 2022 John: Do you have the information on where to look for the resistor and how to recognise it?I'll find it if you don't.ThanksJonathan Link to comment Share on other sites More sharing options...
John Vine Posted October 3, 2022 Share Posted October 3, 2022 Hi Jonathan,The wiring diagram that came with my 2008 kit is the source of the pics I posted. The resistor hangs down behind the dash near the ignition switch, and could well be there to control the ignition warning light. It may have nothing to do with the OP's problem!I'm not even sure that the latest cars (with different instruments) use the same resistor, or what it might look like. This is mine: JV Link to comment Share on other sites More sharing options...
gaxor Posted October 4, 2022 Author Share Posted October 4, 2022 Well it was the dip switches. All working fine now Link to comment Share on other sites More sharing options...
Gridgway Posted October 4, 2022 Share Posted October 4, 2022 I am diagnostic genius! Link to comment Share on other sites More sharing options...
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