Bellissimmo

Thanks Chris, I'll have a read....

Not aware of that. So what have we missed and how should the replacement of a cambelt be undertaken?

No!!! Could've done with that a few days ago. ... and still useful to find the torque settings.

Thanks DJ We've now got as far as pulley off but not likely to get the pulley back on and torqued accurately without a tool. We are looking at the one pictured below. Would be great if you could let me know what tool/source/seller you used because we're not convinced this one will 'fit'.

Mechanic son and I are in the process of changing the cambelt on my 2008 Sigma 125. and facing problems identifying parts. Motor factors want your Reg (which doesn't show up on their system) or the 'engine type' (which I don't know). Just spoken to Caterham parts who say it's an 'early fiesta' but I'm not sure if Ford Parts Dept will be able to identify the correct bolts from that. I'm specifically looking for the Cam sprocket bolts (2) and the bottom pulley bolt. If anyone has been through this loop, I'd be grateful for any advice/part numbers. Also, haven't yet undone the bottom Pulley bolt and wondering if there's a simple way to undo this without the aid of a £50 special tool? Cheers Steve

Oooh, that sounds interesting. ...but how do I isolate the problem? don't really want to end up replacing both. Steve

It's an MBE, so I'll give them a try. Steve

Thanks Paul, as you've probably read, I'm working in Scotland so all communications between me and Andy (co-pilot son) have been me knackered from a long flight or him knackered from working late into the evening. So I haven't even seen the ECU yet let alone reviewing or re-doing any of the work he's already done. Hopefully this weekend, we can get our heads together and finally confirm where the fault is and get it sent off to MBE or whoever the maker is. We have swapped the LT feeds and the fault stays with the 1-4 side of the ECU so I'm pretty convinced it's at the ECU end. Assuming a short in the LT to coil would stay constant, I think we've already eliminated it but I'll double check this w/e. Steve

I ass/u/me he's tested for continuity from the pin on the ecu end to the cable end, so "probably", but I guess there's scope for corrosion inside the ECU connection. He's very thorough but I'll check when he gets home from fixing other people's cars. I've got the 'OEM' ECU as supplied from Caterham - don't know what manufacturer. I'm hoping someone's upgraded and got one laying about but a swap-to-test maybe an option. Steve

Looks like my (125 Sigma 2008) ECU has gone to the big white racetrack in the sky. Looking for a replacement ECU.

So I'm just back from my Tartan-to-Garden commute and co-pilot son has done some more diagnostics and it looks like BAD NEWS. He's got a NOID light (never heard of it? me neither). He can see power on the low tension pair that is supplying cylinders 2&3 nothing on the low tension pair that is supplying cylinders 1&4. He's had the 1&4 low tension cable off and has continuity from ECU to coil so it looks like no 'signal' from the ECU for 1&4. So the question now becomes repair or replace? Are they repairable? Anyone know a specialist that could take a look? Anyone got a spare ECU they want to sell? Just looking for options now. :-(

That was our first stop. Euro car parts had them at 22.50 so we took a punt. swapped them, problem still there. One of our outstanding 'things to check' is whether the the centre wire is live or earth, so if you could shed any light there, we'd be another small step forward.

No 'table of standard colours - but would be nice to know. Not firing on 1 & 4 deduced by pulling off the leads one by one. Pulling off 1 & 4 made no difference, pulling off 2 or 3 stopped the engine running. Also had the leads off one by one and can see a spark from 2 & 3 and not 1 & 4. No chance of the leads being swapped. Worked fine last night, didn't work this morning. Bonnet not been off between nor has there been rain or other water. Would be nice to confirm the function of the three wires into the coil.

So, I'm just home from working 'abroad' (Glasgow*smile*) and the 7 is misbehaving. Co-pilot son took it out for a run last night and it was fine (Honest Dad!). I took it out today and it is misfiring badly. Looks like its not firing at all on 1 & 4. Son (BMW trained and RAC patrol) is baffled - mostly by the wiring diagram. Is there a version of the wiring diagram that actually tells you where the wires go - or maybe an explorers guide to understanding the one that comes with the build manual? We suspect a dodgy earth or a short to earth somewhere but struggling to trace the wires and find the various earth points We have three wires into the coil - assuming centre is for earth and the other two for 1&4 and 2&3. Any assistance gratefully recieved. Steve

Couple of cars behind you but no chance to catch up.