Youngy Posted October 22, 2016 Share Posted October 22, 2016 Iv been having a lot of running issues with my classic lately but can anyone tell me if these would be causing some of the issues thanks Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted October 22, 2016 Share Posted October 22, 2016 Are they quite old? I have some 10k mile old PFR7B plugs of you'd like to test them. Kept them for this exact reason. Quote Link to comment Share on other sites More sharing options...
Jamie_uk Posted October 22, 2016 Share Posted October 22, 2016 Changed plugs on my 2010 rx few weeks ago they had black wet looking threads too. Was told it was normal Quote Link to comment Share on other sites More sharing options...
stants Posted October 22, 2016 Share Posted October 22, 2016 Looks like it's running fairly rich to me Sent from my SM-G930F using Tapatalk Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted October 22, 2016 Share Posted October 22, 2016 These are the ones I pulled after 10k Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted October 22, 2016 Share Posted October 22, 2016 Ditto stants, they look like they are sooted right up, did you take them out after a decent drive or after a few starts in the drive while diagnosing the car Quote Link to comment Share on other sites More sharing options...
Youngy Posted October 22, 2016 Author Share Posted October 22, 2016 What happened was the car just cut out on me pulling it out the garden and then after that the car would only run for 5 seconds then cut out again but then after a day or so it wouldn't start at all, so I checked the maf and the top of it was full of water some how so I dried that out and it just about started so then I changed the plugs for some really cheap ones from ecp £2.30 each lol just to see if it was them then it started on the button but really hesitates at 4K and struggles to go past 4K but does eventually but to the previous question the car kept on getting started but then turned off again with the original plugs hope that makes sense to someone Quote Link to comment Share on other sites More sharing options...
Youngy Posted October 22, 2016 Author Share Posted October 22, 2016 1 hour ago, Scoobyghost said: Are they quite old? I have some 10k mile old PFR7B plugs of you'd like to test them. Kept them for this exact reason. If that is ok yes please mate Quote Link to comment Share on other sites More sharing options...
GeoffLeggy Posted October 22, 2016 Share Posted October 22, 2016 Are you not going to get a replacement maf? Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted October 22, 2016 Share Posted October 22, 2016 Chances are it was the maf tgen mate, and once you've sooted the plugs up you've had it as the spark will just track straight down that black stuff to earth, I would imagine the cheap plugs just may not run your car properly especially on boost Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted October 22, 2016 Share Posted October 22, 2016 14 minutes ago, GeoffLeggy said: Are you not going to get a replacement maf? Missed that bit, yeah I second that question .. Quote Link to comment Share on other sites More sharing options...
johned Posted October 22, 2016 Share Posted October 22, 2016 NGK pfr6b plugs for standard subaru classic and no other brand in my opinion. Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted October 22, 2016 Share Posted October 22, 2016 NGK pfr6b plugs for standard subaru classic and no other brand in my opinion. Agree with that but for modified id always go for PFR7B. You're more than welcome to bring it over and we can do the plugs for a test. Quote Link to comment Share on other sites More sharing options...
johned Posted October 22, 2016 Share Posted October 22, 2016 1 hour ago, Scoobyghost said: Agree with that but for modified id always go for PFR7B. You're more than welcome to bring it over and we can do the plugs for a test. Fully agree but i did say for a standard car and yes as you say PFR7B for a modded car but we both agree NGK all the way. Quote Link to comment Share on other sites More sharing options...
JamesJDMwagon Posted October 22, 2016 Share Posted October 22, 2016 I had the same problem hesitation at around 4K the fix for me was simple after one year of living with it. I put new plugs in and gapped them down to .5 and now it feel like a new car pulls so strong. I guess it was just blowing out the spark when boost hits. 1 Quote Link to comment Share on other sites More sharing options...
Youngy Posted October 23, 2016 Author Share Posted October 23, 2016 Yes I will be putting a new maf on, i did put up a wanted post on here to see if anyone had one, but I'm not too clued up with all this so because the maf has gone and because I kept on trying to start the car it actually sent the plugs black is that right Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted October 23, 2016 Share Posted October 23, 2016 More than likely what happened, you could actually clean them up , but tbh your better off sticking a set of iridium or platinum or whatever it is in there unless the early scoobs need a different sort of plug Quote Link to comment Share on other sites More sharing options...
stants Posted October 23, 2016 Share Posted October 23, 2016 Import car parts have purple maf's for about 240 quid new Sent from my SM-G930F using Tapatalk Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted October 23, 2016 Share Posted October 23, 2016 Think I've possibly got a v3/v4 maf at home , I'm not back till Tuesday so I'll have a look then . Good possibility that you've blackened the plugs if it's only been running on cold idle starts and especially with possible maf issues . Regap the plugs to 0.6 mm when refitting and it should help if it's a "spark on boost " misfire making the plugs black. Quote Link to comment Share on other sites More sharing options...
Youngy Posted October 23, 2016 Author Share Posted October 23, 2016 Cheers for the info guys but I will be getting new plugs because the ones that came out are only bosch supers and cheers savage because I can't afford a new maf at the mo Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted October 23, 2016 Share Posted October 23, 2016 7 hours ago, stants said: Import car parts have purple maf's for about 240 quid new Sent from my SM-G930F using Tapatalk JEEBUS WEPT !!! Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted October 23, 2016 Share Posted October 23, 2016 Just remember that if/when you regap iridiums/platinum plugs to be really careful as it is really easy to actually break the tip off of the electrode Quote Link to comment Share on other sites More sharing options...
Youngy Posted October 24, 2016 Author Share Posted October 24, 2016 Yeah I will do but in all the years that Iv messes around with cars Iv never had to adjust the gap on a plug but everyone keeps saying use ngk plugs but the ones that came out my car where Bosch supers and they performed really well in my car so I'm not sure what one and to use now Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted October 24, 2016 Share Posted October 24, 2016 Think just about everyone runs ngk heat 7's, as they're a slightly hotter running plug than the factory spec ngk heat 6's and therfore cause less misfire issues due to the extra heat produced by the boxer layout when running higher than standard power . If the spark is a bit weak or your running extra boost (remapped) scoobs can "blow the spark out" (hence using a smaller gap ) If it's running standard boost and everything else is healthy you should be fine with a standard gap . Just be careful when re fitting plugs cos it's easy to crack the porcelain insulation and cause a misfire problem which can be over looked easily. As you don't think it's a plug issue due to fitting new ones [emoji6] Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted October 24, 2016 Share Posted October 24, 2016 53 minutes ago, savage bulldogs said: Think just about everyone runs ngk heat 7's, as they're a slightly hotter running plug than the factory spec ngk heat 6's and therfore cause less misfire issues due to the extra heat produced by the boxer layout when running higher than standard power . If the spark is a bit weak or your running extra boost (remapped) scoobs can "blow the spark out" (hence using a smaller gap ) If it's running standard boost and everything else is healthy you should be fine with a standard gap . Just be careful when re fitting plugs cos it's easy to crack the porcelain insulation and cause a misfire problem which can be over looked easily. As you don't think it's a plug issue due to fitting new ones Forgot about that last bit savs , had two plugs in mine with broken porcelain, one had a big lump missing as well 😕 Quote Link to comment Share on other sites More sharing options...
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