Trotsky Posted August 28, 2013 Share Posted August 28, 2013 Fingers crossed, I hope I have found the cause of a slight misfire/hesitancy when accelerating hard, I have been through checking; ht leads, plugs, checking fuel pump. fuel pressure, coil pack etc, not found any mention in searches on here of air filters causing issues but failing all else decided to remove them and see what effect it had, scared of sucking in debris and causing damage I bodged some of the wife's stockings over the trumpets for a test run, misfire a lot worse as the stockings allow less air in(wrong denier ) same issue as when filters fit only much more pronounced at all revs, jumped out, whipped off the stockings and blatted up through the gears, immediately smooth running, clean revs across the range. put the KN filters back on , back to old lumpiness and hesitancy, whipped em off , clean smooth running again.the carbs were adjusted on the dyno a couple of months back and were spot on until this latest issue, So seems the filters are clogged? They are for 45 webers by the way. I have searched K N suppliers but cant seem to find any the same size as mine 170mm long, 110mm wide and 80mm high ( just the filter not the housing.) so have decided to try cleaning them, given them a good blast with carburetor and intake cleaner which has loosed a lot of grime. is this a good idea? can they be dishwashered or am I wasting my time . , what are my options re filters? cheers folks Link to comment Share on other sites More sharing options...
zetec Posted August 28, 2013 Share Posted August 28, 2013 Dont dishwash them!! Clean yours then buy new ones. My old crap ones cost me 16bhp!!! Or buy a pipercross foam filter & hear those carbs more! Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted August 28, 2013 Share Posted August 28, 2013 They do a cleaning and re-oiling kit. You spray the cleaner on, leave for a bit then rinse off from the inside Link to comment Share on other sites More sharing options...
Racingshoe Posted August 28, 2013 Share Posted August 28, 2013 Just as SM25T said Cleaning & re-oiling them with the correct kit is really easy. I got my servicing kit from Halfords here Link to comment Share on other sites More sharing options...
myothercarsa2cv Posted August 28, 2013 Share Posted August 28, 2013 I'd be more inclined to use the K&N cleaning kits... carb cleaner is quite aggressive, not sure what that would do to the cotton. Is it this chap? Link to comment Share on other sites More sharing options...
Trotsky Posted August 28, 2013 Author Share Posted August 28, 2013 That's the one John . I'm picking up a cleaning kit from alfrauds later, if all fails I'll replace with new ones. Had a sniff of the KN filter cleaning kit last week and decided the cleaning fluid seemed amazingly similar in smell to the muck off I use on the mtb at half the price, which coincidently is the same as fenwicks caravan cleaner only a different colour , at half the price of muck off before you all shout tight Yorkshire git, I'm buying the kn kit at a extortionate 15 sovs as it includes the oil, which is probably olive oil anyway Link to comment Share on other sites More sharing options...
Richard K Posted August 28, 2013 Share Posted August 28, 2013 Russ. I have a K&N kit I post up the ingredients on the bottle tomorrow. Richard Link to comment Share on other sites More sharing options...
Trotsky Posted August 29, 2013 Author Share Posted August 29, 2013 Cheers Richard, I've actually bought the kit, used the cleaner and they are drying out now, very little crap came out compared to the first application of carb/ intake cleaner, that shifted loads of gack/ flies etc. Link to comment Share on other sites More sharing options...
Richard K Posted August 29, 2013 Share Posted August 29, 2013 Air Filter Cleaner - Sodium metasilicate pentahydrate (CAS No. 6634-92-0) Air Filter Oil - Distilates (petroleum), hydro treated heavy paraffinic (CAS No. 64742-54-7), 1-Decene, homopolymer, hydrogenated (CAS No. 68037-01-4), C.I. Solvent Red 164 (CAS No. 71819-51-7) So it's not "Snake Oil" Richard Link to comment Share on other sites More sharing options...
Richard K Posted August 29, 2013 Share Posted August 29, 2013 Just about too use mine Richard Link to comment Share on other sites More sharing options...
Trotsky Posted August 29, 2013 Author Share Posted August 29, 2013 here oil is oil? 😬 I had to laugh, reminded me of the time a mate filled his hope mtb disc brake reservoir with olive oil instead of dot 4 , oil is oil he said. That'll be useless as a brake fluid we said, but he wouldn't listen, and crashed. Mine are drying out now so well have to wait a few days to see if I've cured the poor running, I'm ashamed to admit I've never cleaned them in 5 years 40+ k miles Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted August 29, 2013 Share Posted August 29, 2013 They must have been a little dusty then Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 29, 2013 Member Share Posted August 29, 2013 Quoting Richard K: Air Filter Cleaner - Sodium metasilicate pentahydrate (CAS No. 6634-92-0)Is there some detergent added at some point? Thanks Jonathan Link to comment Share on other sites More sharing options...
Richard K Posted August 29, 2013 Share Posted August 29, 2013 Jonathan, There is no detergent. The instructions say to use the cleaner then rinse off with cool low-pressure water? Richard Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 29, 2013 Member Share Posted August 29, 2013 That's interesting: what does the water look like after it's washed the filter? Thanks Jonathan Link to comment Share on other sites More sharing options...
Trotsky Posted August 31, 2013 Author Share Posted August 31, 2013 Well they are back on , having cleaned and oiled them, and it's like a new car 😬 can't believe the difference. Happy days, no hesitancy at any revs, must have been missing a few horses as it feels and drives amazing again. Link to comment Share on other sites More sharing options...
randybugger Posted August 31, 2013 Share Posted August 31, 2013 Nice one I clean mine regularly but bought some new ones last year as they were looking a little battered, made a big difference. Link to comment Share on other sites More sharing options...
Trotsky Posted August 31, 2013 Author Share Posted August 31, 2013 Ill be cleaning mine regularly from now on that's for sure, it's one of these things that creep up unnoticed as they get less effective I suppose, theyre about the only thing on my car that have not been cleaned, stripped or messed with regularly. Lesson learned I presume they are the original ones and as my car is now 18 and 90k miles I suppose it would be prudent to get some fresh ones, can you just buy the filter without the metal ware? Edited by - Trotsky on 31 Aug 2013 17:28:11 Link to comment Share on other sites More sharing options...
6speedmanual Posted August 31, 2013 Share Posted August 31, 2013 Yes, replacement elephants are available. If your filters are wholly within the bonnet it would be worth looking for some paper / conventional inserts. There is some evidence on t'internet that they flow more and clean better than the cotton and gauze k&n. I'm surprised at the grime on the 'clean' side inlet tract of one of my cars which has a k&n. Must change to a Mann&Hummel. The k&n does have the advantage of not going soggy when rained on. Peter Link to comment Share on other sites More sharing options...
RS2000 Posted September 3, 2013 Share Posted September 3, 2013 Is this the K&N Elephant you mention....? doesn't look like it will flow too well... here Link to comment Share on other sites More sharing options...
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