Tomiam

+1 to this. Just installed a Flexi Coil Loom into my R400 Duratec. Johns previous post and help has been brilliant! Thank you John! :D

Cheers for the info again John. Flexi loom arrived, sans male connector. Thought that would be ok as I have a six pin connector already on the loom, what I didnt realise is that its the 6 pin connector for the injectors.... pretty obvious once you unwrap all the black tape on the loom. I need to slice into the loom wiring and add a 6 pin male connector. Your photos are a great help thanks and Im pretty confident in completing the task once Ive got the male connector and a bunch of crimp pins here. Im off sprinting this weekend so its going to have to wait until after the event now.

..

ignore sorry.

Thanks John. I already have the six way. Was trying to work out why you mentioned splicing the loom. Now I know. Should be here today so plug n play tonight :)

Good.point John. I will check.later. Flexi loom is due here Wed ( tomorrow ). Anything tricky about it or is it simply a case of plugging it in with a minor bit of work?

Woohoo! I've paid back a bit of the help I've received from these forums!! :D :D Glad Ive helped with at least a bit of the problem.

Probably way off Base here... but aren't the shift lights and rev limiter adjustable? Ie. Worth checking the module under the dash?

Took me a while to get it :)

45 min test drive complete. Speedo working as normal. Engine behaving 99% as normal, the odd splutter when I'm in 5th or 6th, 2k rpm and I put my foot down. Doesn't do it if I'm in correct gear. Happened twice on the trip and last about 4 seconds. The odd 'miss' coming from the engine at 2.5k rpm in 5th or 6th but it's so infrequent that it's not an issue and was there prior to fault as reported above. Will replace existing COP loom with race flexible loom and see if those minor niggles go. At worst it's future proofing it, at best I may have a minor break starting to happen and I'm avoiding being stranded.

When I say 'look into' I mean... I just ordered one. :) For reference : my r400 was registered in 2008. Has done 15.5k miles and has been garaged since I got her last year. All wiring is secured in place with cable ties and loom tape. Ie. Very little movement apart from at the point where wires connect to the coil on plugs. Wires at this point are not tight. Hope this info helps someone :)

Fantastic info. Thank you. :) The break sounds in exactly the same place as yours John. The break in the wiring was just before the clip which connects to the COP. As in .. about 2 mm before. The cylinder was the furthest one from the drivers seat (don't know what number that is sorry.) I shall look into that race loom.

Righto... I think (well tbh.. Im bloody sure) Ive found the fault. Despite checking the spark plugs / wires etc , one of the wires had a break in it. Once Id pulled back the tape covering it, it was nearly sheared off! I guess the engine vibration had caused this. Speedo is still disconnected and Im 30 mins late for my sisters birthday party.... so ive got to dash but will take her out for a drive tomorrow. Pretty confident given the massive improvement in engine tone that the spluttering is fixed though. Speedo cable.. I will investigate tomorrow. Worrying though.. as one wire has snapped.. whats to stop the others going? Is it worth me replacing them? THANK YOU! again to everyone for their help and advice. It IS very much appreciated. :) and.... Im gaining knowledge! :)

Unplugged speedo sensor by disconnecting plug at rear right wheel. Started car. Same issues even with it stationary. Can hear it spluttering. Tested lambda sensor. With diagnostic cable connected I can see the lambda flicking above / below 1.00 so I'm ruling out fuel / air leak. Have a electronics diagram.. have multi meter.. Working out where to go next.

Cheers for the info folks. Been away for two days and wife has determined I need to take her to Costa. . Sneaking in a relay whilst she is getting coffee again.. I have a wiring diagram and multimeter. Will give more info once home. Thank you very much for assistance!! :)

I'll try and keep this concise so the information is presented clearly. Driving to a track day:- All good starting and driving for first hour. Went up the motorway and stopped in service station. Slight grounding out on the speed bump at low speed but nothing major. Got food. Restarted fine. Drove out of the service station, onto the slip road (this took about 2 mins) and gave it a blast. 3/4 to full throttle. Went perfectly fine. Joined traffic and lifted off and the engine started spluttering. Just like if you had a duff lambda sensor and the engine runs too rich. Kept going on low to medium throttle and it was just about detectable but nothing bad. Within 2 mins, all perfectly fine. I do notice that at about 2.5k rpm the engine is a little 'bumpy' but its very very minor. Two and a half hours later into the trip and I give it another blast for about 15 seconds. Lift off and the same as above. We stop for fuel, station has 95 octane only so that goes in. We spent the night in a hotel. No rain. Got up in the morning, car starts fine no issues. I give a medium squeeze of throttle on the way to the track day, no issues. First session on track Anything over about 4k rpm and SPLUTTER SPLUTTER SPLUTTER. Very bad. Massively down on power. Had a look over the car and nothing obvious. All seems ok. Spark plugs look a little lean. Quite light brown / grey. Someone suggests reseting the ECU as the 95 octane might be causing an issue. After reset it runs terrible so I take it a fuel station and put super unleaded in. This doesnt change anything. (NOTE: On the trip home we practically ran her out of fuel and then put 97 octane in. No difference) A few more sessions on track for a couple of laps each time and its getting slightly worse. Pulling away, its spluttering and nearly stallling. Give it a ton of revs and it will pull away , just. 90mph is a push to achieve and the engine is spluttering like mad. We call it a day and decide to drive home (4hr journey..) Engine is progressively getting worse and its spluttering all the time on the trip back. Hugely down on power and feels a bit like its hesitating when the throttle is pressed and then spluttering / rarely surging forward. I notice on the motorway that the speedo is very minorly fluctuating about 2 - 3 mph over / below the speed we're doing. As if the needle is bouncing. We come off the motorway and onto the 3 miles of normal road to my home. Speedo is bouncing all over the place about 10 mph over / below where it should be. Not sure if this is getting worse because of lower speed or because the problem is getting worse. Made it home. I have the cable to connect her to a laptop. I have limited mechanical / electrical knowledge but Im getting there. I would welcome thoughts as to what area I should be looking at please as Im not sure if the speedo bouncing is connected or not. My own thoughts on the spluttering are: Fuel pump dying? TPS? Injectors? Any help very gratefully received as Im meant to be sprinting next weekend! :)

Now sold.

Just been out in the garage and video'd em. Link to video: https://www.youtube.com/watch?v=iUtjrl0b56o&feature=youtu.be Tread depth varies. Two of them are 5mm deep , one is 4mm and one is 3mm. Dates are all XX/08 from 08/08 to 29/08

They came with the car when I bought it second hand last year. I haven't used them, and have no use for them as I'll be purchasing a slightly wider width for sprinting. 2 x 175/55/R13 2 x 205/55/R13 Very good levels of tread, tbh.. I would say very close to unused. Photos show details but if you have specific questions please just ask :) £250 for cash on collection. Im in Nailsea, North Somerset. Postal code of BS48

There is no cat.

Hi John, Laptop re-acquired and files uploaded. :) Link1: http://www.filedropper.com/smiffylog2 Link2: http://www.filedropper.com/smiffylog2lsn After cllicking on the link, scroll down a little bit to the download link. Dont be caught out by the "download now" message at the top. Just tested them and both links give a download screen. Any problems, please dont hesitate to ask.

Hi John, All is running very well thanks. Just replaced my rear brake caliper and taught myself all about the brake system whilst doing so. Frustrating at the start, but feeling satisfied now Ive got my heads around how it works :) No engine running troubles at all , which is great! Those links should be working, the only thing I can think of is that the files have been deleted by filedropper. I use my wifes laptop from work, so will have to wait a bit before she goes back and I can grab the files off them again for upload. I may have them on a memory stick at my work but doubtful. Soon as I have them I shall upload. I dont believe you need to be logged in to download them. :)

Hiya, Dont worry about any delay. I browse the forums pretty much every day so all good. Yep, the Lambda I have is Bosch 0258 003 229. Its been perfectly fine since I changed it over. Which is good :)

Im going to be purchasing some ZZR's based on feedback from a couple of Caterham owners who were using them at Oulton Park recently. Question for those using them, what pressures are you running them at please and are these pressures measured when hot or cold?

Only did one last year at Oulton Park. Was great :) Wouldve done more, but I only got my Caterham in July so not having a Seven was a bit of a barrier to doing more... ;)