Nigel Pugh Posted October 20, 2002 Share Posted October 20, 2002 Guys, I looks like one of the plugs has failed on my R400 already, resulting in a misfire. What plugs should I fit? The ones fitted are Champions, I would like to change to NGK as I dont want the Champions to fail again. I have looked though the archive and it seems that NGK - BKR7EVX or BCP7ES are recomended. Any other advice? Thanks. Nig Pug X400 SLR - R400 Running -almost complete. Link to comment Share on other sites More sharing options...
V7 SLR Posted October 20, 2002 Share Posted October 20, 2002 Nige, in 16,000 miles I haven't had any fail. Apparently electronic ignition is good for preserving plugs. However, whilst trying to diagnose my misfiring problem (which turned out to be the ECU, hence the change to Emerald) I did change the plugs, but I retained my original plugs if you just want to give them a try. They work perfectly, despite looking a little yellow due to heat cycling. Can't remember the type. They're in the garage, and I'm in the lounge in dressing gown, marvelling at my restored central heating and watching the brave/stupid squirrel standing on the window ledge next to me. I'm in all day if you fancy a trip over here. I've got a few more jobs to do on Hotel Marston before I'll be "allowed out to play". Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
Colin Grundy Posted October 20, 2002 Share Posted October 20, 2002 V7 I presume your change to an Emerald ECU required a mod to the loom, or were you on an EU2 loom. If you did modify it, how did you do it.? Link to comment Share on other sites More sharing options...
Peter Carmichael Posted October 20, 2002 Share Posted October 20, 2002 The same rule always applies with spark plugs - run the coldest that the engine doesn't foul on. NGK numbers include the heat value in the code. This means that BCPR8ES is a colder version of BCPR7ES. Heat values run up to 9 (the coldest). I run 9s from the NGK race range in the big engine and they don't foul. I would try an NGK BCPR8ES in an R400. The R in the code is for "resistive" which reduces RF interference and prevents the car from setting off other peoples car alarms and interrupting the operation of the ECU. Link to comment Share on other sites More sharing options...
Swiss_Tony Posted October 20, 2002 Share Posted October 20, 2002 Peter IIRC they dont do a BCPR8ES I use BCR8ES in my vx. The difference is in the electrode length. James P17HPC The K2RUM Eater K2RUM EATER@hotmail.com Link to comment Share on other sites More sharing options...
Swiss_Tony Posted October 20, 2002 Share Posted October 20, 2002 Peter Saw your piston on Thursday OUCH! Forgot to add that I have had nothing but problems using Champion plugs in most engines. I usually find a set of NGKs sort it out. James P17HPC The K2RUM Eater K2RUM EATER@hotmail.com Link to comment Share on other sites More sharing options...
Fred Posted October 20, 2002 Share Posted October 20, 2002 nigel the map on the R400 is rubbish i think you will find if you clean the plug you will be ok . i just wish they would get there finger out and get someone competent to do the job . i have not driven mine yet but on starting and running it pumps out fuel and runs ****e 🙆🏻 fred Link to comment Share on other sites More sharing options...
shin.suri Posted October 20, 2002 Share Posted October 20, 2002 Fred I've gone back to the original "race" map the car came back, pretty naff under 4000 rpm but much better above the that. the 2nd map i tried just dumped petrol out of the exhasut and never felt as good as the "race" map. I averaged 100-120 on a tankful with the 2nd map but on the orginal closer to 140 and a leisurley trip back on the M4 saw 170. It's all probaly due to my driving, what i mean is that when stuck or in slow moving traffic i tend not get above 3-5000 rpm. Shin ps. still no sign of a completed map though... Link to comment Share on other sites More sharing options...
Fred Posted October 20, 2002 Share Posted October 20, 2002 SHIN-YHM. fred Link to comment Share on other sites More sharing options...
Gridgway Posted October 20, 2002 Share Posted October 20, 2002 so why is that then? If the R400 map is just simply rubbish and it can be fixed, why don't caterham or whoever is doing it just do it? It maketh no sense to me. Graham Link to comment Share on other sites More sharing options...
V7 SLR Posted October 20, 2002 Share Posted October 20, 2002 We need a lawyer to let us know where R400 owners stand getting the ECU password off Caterham, then they could buy the software and cable and go to someone who can do it properly. There's no magic involved so it beats me why they can't do it themselves. Colin, I've got an SLR which is the earlier loom (I'm not sure it is called EU2, but I get the point). The Emerald worked with my car "out of the bag" but my loom has been (and is being) heavily modified since then anyway. Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours 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