ausmini :: View topic - Calling all Plug Whisperers

Black plugs means its running too rich, white plugs means too lean, ideally you need a greyish colour to the plugs if its running right.

Doogie

Do a compression test on all 4 and compare to each other.

should i mention that when i went to take that black plug out, it was only in finger tight...

perhaps even looser..

:oops:

Yes you should mention that

Its saves us telling you that the engine is about to blow up and drop bits all over the road.

As said replace the plugs and this time tighten them. Take the car for a quick blat around the streets until its warm. Then listen for a miss, if still there pull the plugs out and again check for colour.

If still smokey - replace that plug lead and again take for test drive.

If problem still exists on that cylinder then you have an oil control problem of some sort. Live with it until the day comes when the plug constantly fouls making driving unbearable and when you have a spare $1000 for an engine reco.

On one stretch of a long straight downhill, i put the boot in and i had to back off as the needle sailed past 75 and on towards 80, where previously it was a fair task to get it up there (even downhill)..

Author:	cush [ Wed Dec 13, 2006 8:53 am ]
Post subject:	Calling all Plug Whisperers
these are the ones i took out this morning.... is same order as removed.... clutch cover to -- >> radiator... hard to see but the second to left plug is the black one.. what's the diagnosis..?

Author:	doogie [ Wed Dec 13, 2006 9:09 am ]
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Black plugs means its running too rich, white plugs means too lean, ideally you need a greyish colour to the plugs if its running right. Doogie

Author:	DOZ [ Wed Dec 13, 2006 9:11 am ]
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Do a compression test on all 4 and compare to each other. Possibly a dead/dieing plug/lead or dizzy cap issue. Doubt anything to do with valve stem seal/s so maybe worn oil control ring on that cylinder but I reckon it's more likely something to do with ignition without other info. Maybe swap the plug to another cylinder to try? Hmmm, Daniel

Author:	Gadgets mini [ Wed Dec 13, 2006 9:40 am ]
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2 S's & a clubman wrote: Black plugs means its running too rich, white plugs means too lean, ideally you need a greyish colour to the plugs if its running right. Doogie I didnt think we could call things black or white any more you would have to describe them some thing like this Black= Native West Indian in apperance or the Color things go after Mr Lucas has struck White= the color of Cushs Bum

Author:	cush [ Wed Dec 13, 2006 10:05 am ]
Post subject:
DOZ wrote: Do a compression test on all 4 and compare to each other. should i mention that when i went to take that black plug out, it was only in finger tight... perhaps even looser..

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Calling all Plug Whisperers https://www.ausmini.com/forums/viewtopic.php?f=2&t=25803	Page 1 of 1

Author:	Mike_Byron [ Wed Dec 13, 2006 10:11 am ]
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Yes you should mention that Its saves us telling you that the engine is about to blow up and drop bits all over the road. As said replace the plugs and this time tighten them. Take the car for a quick blat around the streets until its warm. Then listen for a miss, if still there pull the plugs out and again check for colour. If still smokey - replace that plug lead and again take for test drive. If problem still exists on that cylinder then you have an oil control problem of some sort. Live with it until the day comes when the plug constantly fouls making driving unbearable and when you have a spare $1000 for an engine reco.

Author:	willy [ Wed Dec 13, 2006 10:21 am ]
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cush wrote: should i mention that when i went to take that black plug out, it was only in finger tight... perhaps even looser.. Stormy Summers tight?

Author:	cush [ Wed Dec 13, 2006 10:40 am ]
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Mike_Byron wrote: Yes you should mention that Its saves us telling you that the engine is about to blow up and drop bits all over the road. As said replace the plugs and this time tighten them. Take the car for a quick blat around the streets until its warm. Then listen for a miss, if still there pull the plugs out and again check for colour. If still smokey - replace that plug lead and again take for test drive. If problem still exists on that cylinder then you have an oil control problem of some sort. Live with it until the day comes when the plug constantly fouls making driving unbearable and when you have a spare $1000 for an engine reco. yeah i reaplced all the plugs/leads this morning.. that's when i saw how black that one was and how loose... (yes, willy, SS loose) that plug was.. there wasn't any smoke... (ignoring the sound off at matm )

Author:	Mike_Byron [ Wed Dec 13, 2006 11:11 am ]
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And the result of the test drive is ??????

Author:	cush [ Wed Dec 13, 2006 11:30 am ]
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sweeet could do with a proper tune, but then.. who's doesn't...

Author:	DOZ [ Wed Dec 13, 2006 4:17 pm ]
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Did you figure out if the plug/lead was dead or was it just from being loose. I always do a compression test before a service to check the health of the engine. Black plugs are caused by a multitude of problems, the easiest one being incorrect mixture. When one is black on a carby 5-port mini engine, it can't be a mixture problem. I had a mate who had a Datsun 260Z with triple webers, he had a re-occuring intermittant problem on one cylinder and blamed the carbies and sold them, turned out it was a dead (faulty I should say, it still worked occasionally) lead. Tough lesson, try buying triple webers now Daniel

Author:	cush [ Thu Dec 14, 2006 7:43 am ]
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i bought new plugs and leads for a couple of reasons 1. because the engine didn't feel right at higher revs/load 2 I noticed that one of the leads had bean rubbing on the grill and had worn down 3. because the car had been stationary for a while and deserved something new.. i drove it to work and back yesterday.... a good mix of uphill , downhill and traffic there's a big difference...especially up the top of third and fourth... On one stretch of a long straight downhill, i put the boot in and i had to back off as the needle sailed passed 75 and on towards 80, where previously it was a fair task to get it up there (even downhill).. i was planning on attempting the timing (sans timing light) but then i decided to check how my timing was, since i was at brickworx anyway... i'm at about 10 deg advance.... so i don't need to bother.. but i'm slightly annoyed... because it means that the power i want, mean i need to start adding o removing things from the engine now... :{ any who, i'll be doing the tappets today with my new feeler guage... it fangs well now... lets see if we canget it fanging quitely..

Author:	DOZ [ Thu Dec 14, 2006 7:00 pm ]
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A couple of things, Stop that lead rubbing on the grill if possible (small thing) 10 deg advance at idle might be good, but what about total? You can do this on Dyno to find the extra power hidden at the moment. Daniel

Author:	cush [ Sat Dec 16, 2006 8:16 am ]
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cush wrote: On one stretch of a long straight downhill, i put the boot in and i had to back off as the needle sailed past 75 and on towards 80, where previously it was a fair task to get it up there (even downhill).. after adjusting the tappets.....and dropping the wife off at work this morning... same road... sailing past 85 on towards 90

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