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Nov 29, 2006 17:41:23 GMT
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Hi there, As mentioned my readers ride thread, I've been adjusting the timing on my Imp. Just wondered if you could help me by letting me know what you think of the condition of my spark plugs? I know generally what all the different deposits mean thanks to Haynes and google, which is why I changed the timing in the first place. When i first looked at the plugs they were very carbon fouled. So what would you say now? I cant tell whether the white/light brown bits are a deposit or not (couldn't touch it becuase they were rather hot!) Plus so far, I've not got a great track record for being right  Anyway, here's a pic, what do you reckon? Cheers!  |
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Nov 29, 2006 17:55:50 GMT
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Looks quite nice to me, light brown nose, not too sooty
J
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Nov 29, 2006 18:01:47 GMT
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phew!
Best check the gaps as well i suppose then!
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Nov 29, 2006 21:33:08 GMT
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I've chipped far worse off plugs.
I have found that the quality of the fuel I use has the biggest effect, supermarket fuel = decoke early, BP/Esso/Shell = clean plugs.
Of course, your plugs may vary, but that's my experience.
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"Jeremy Clarkson, a man we motor enthusiasts need on our side like Lewis Hamilton's F1 car needs a towing ball and a Sprite Musketeer" My motor |
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kerbsidemotors
Part of things
kerbsidemotors! A refreshingly helpful, genuine, unpretentious ebay seller!
Posts: 99
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Nov 29, 2006 22:07:53 GMT
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Looks ok to me too. Remember plugs will look a bit more sooty if you run the choke regularly.
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alex
Part of things
Posts: 382
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Nov 29, 2006 23:56:42 GMT
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I thought excessive choking would cause wet plugs....those plugs look dry, so don't think that would be the cause. TBH those plugs look OK to me...the right colour with a small amount of deposit. However that depends how long you ran them for....if that deposit was built up after just a few miles then you have have issues. If you run it for some time then it might be a fairer to compare them against the "norm". Would be interesting to see if you ran it for a while if the rest of the plug ends up having a sooty appearance. If it does it could suggest ignition probs, rubbish cooling system, plug with a too-high heat rating or igntion probs.
Remember running the car on idle after cleaning the plugs to test timing/mix doesn't really work.
Did you end up advancing or retarding the ignition? Have you got pics of how the plugs were when they were bad?
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1974 Rover P6 4.6V8. Land Rover Series 2A 2.25 "overland spec". RRC V8. Celica GT4 ST205 Garrett 3071R 366BHP.
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I havent got pics of when the plugs were bad but to be honest you don't need them, just imagine a very, very, very, very sooty plug!! I cant remember what i did with the timing I'm afriad as it took a fair bit of playing with to get it right However that photo was taken after driving for half an hour out into the country, about 15 minutes break, and then driving back again! Tbh as long as it's better than they were before! |
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Nov 30, 2006 10:48:11 GMT
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TBH most cars with carbs have soot. They sott up on choke and burn off the electerode and earth nubby when up to temperature.
Wet plugs are caused by flooding. Unattomised fuel cannot readily spark-ignite so just end up wetting the plugs.
Running on too much choke / too rich mix gives you black deposit (on the whole plug).
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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