MonkeyBoy Posted March 21, 2012 Share Posted March 21, 2012 Hi all, My crossflow won't start - checked at the plugs and no spark, there seems to be voltage across the coil, but i don't think the Hall sensor in the dizzy is sending the right signal to the amplifier thingy. I measured the voltage on the 3 wires coming from the Hall sensor as follows: Red: ignition on 8.5v, cranking 6.5v Black: 0v (earth) Green: ignition on 0.07v, cranking 0.12v I thought that there should be a higher signal voltage coming from the green wire - anyone know if this is the case ? Cheers Alistair Link to comment Share on other sites More sharing options...
dalongbloke Posted March 22, 2012 Share Posted March 22, 2012 Nobody knows.... I certainly don't! Andy Link to comment Share on other sites More sharing options...
Baz Hemsley Posted March 22, 2012 Share Posted March 22, 2012 I think the hall senser is only a form of switch. I trust you have checked the carbon brush in the distibutor cap. Link to comment Share on other sites More sharing options...
TJG Posted March 22, 2012 Share Posted March 22, 2012 Normally Hall sensors have a 5 or 12v supply, an earth and a square wave signal out to the amplifier. Ideally check the signal with a scope but if not available turn the engine over slowly and check the output switches between approx 0v to 5 or 12v. Immobilise the engine while doing this just in case it kicks into life (ground king lead) You may be able to confirm rest of system is ok by 'splashing' an earth to the disconnected hall sensor signal terminal and seeing if the king lead will spark approx 5mm to earth. If any of above is unclear (probably ) let me know. Usual disclaimers 😬. Tony Link to comment Share on other sites More sharing options...
MonkeyBoy Posted April 30, 2012 Author Share Posted April 30, 2012 Only just got around to looking at this again (now the weather has cleared up!)... You may be able to confirm rest of system is ok by 'splashing' an earth to the disconnected hall sensor signal terminal and seeing if the king lead will spark approx 5mm to earth. When turn the engine over normally there is no spark at the king lead, but splashing an earth to the signal wire (green) did indeed give a king lead spark, so it does look like the Hall sensor. I'm not sure if you can just get a replacement Hall sensor - anyone know ??? Cheers Alistair Link to comment Share on other sites More sharing options...
charlie_pank Posted May 1, 2012 Share Posted May 1, 2012 here? Link to comment Share on other sites More sharing options...
TJG Posted May 1, 2012 Share Posted May 1, 2012 Do you know the manufacturer and part no of distributor? Tony Link to comment Share on other sites More sharing options...
MonkeyBoy Posted May 1, 2012 Author Share Posted May 1, 2012 Took the dizzy and sensor out this evening, few pics here Can't see the Lucas number on the dizzy but has a Aldon sticker on it and 103fxyuls scratched in the side which apparently the Aldon part number for the std dizzy for XFlow Caterhams. The Hall sensor has Lucas on the top and the number 9450 on the side. Cheers Alistair Link to comment Share on other sites More sharing options...
TJG Posted May 2, 2012 Share Posted May 2, 2012 Sorry Alistair, nothing suitable in my box of bits. Guess its a phone call to Aldon to see if they will supply Hall sensor. Good luck, Tony. Link to comment Share on other sites More sharing options...
MonkeyBoy Posted May 3, 2012 Author Share Posted May 3, 2012 Thanks Tony, appreciated, i'll give Aldon a call.... Cheers Alistair Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now