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Car Forum / MINI / February 2004No. 1 Spark Plug Fouls
I normally use my 1968 Mini to go to and from work. My No. 1 Spark Plug (the one nearest the radiator) fouls up very often and the car then chokes. It clears up after I have taken the car for a fast run in the motorway. What is the reason for only the No. 1 plug fouling ? Can it be rectified ? > I normally use my 1968 Mini to go to and from work. My No. 1 Spark > Plug (the one nearest the radiator) fouls up very often and the car > then chokes. It clears up after I have taken the car for a fast run in > the motorway. What is the reason for only the No. 1 plug fouling ? > Can it be rectified ? Could be any numebr of things, I have the same thing on the 3rd plug, yet compression tests, a DIY strip and rebuild of the head and new igntion leads, plugs, dizzy cap, points, rotor, dizzy etc don't seem to change anything. Unless you planning a full rebuild - I'd just run a grade hotter plug, or possibly try a high energy ignition system - I bought a kit from dse.co.nz and it seems to have cleared up the problem. http://www.raromachine.com/mini/ for pics. splam Hi Splam, In your case,,,,,,,,,,,,,,,,,,, Sounds like you have done everything except the piston rings, I would put money on the oil rings being stuck in the groove of the piston, and as you know the recommended rectification is a strip down and de-coke, there are some chemicals on the market that will clean and de-coke the engine while you drive, its possible Francis has the same fault, Fitzy > > I normally use my 1968 Mini to go to and from work. My No. 1 Spark > > Plug (the one nearest the radiator) fouls up very often and the car [quoted text clipped - 13 lines] > > splam Could be a Valve stem oil seal, giving it a good run out would burn off the oil in the chamber enough for you not to have any on the plug, however slow local runs would not burn off the oil as much? jono  SignatureBarspeed Mini`s - Devoted to the Classic Mini "Persisto Transverbero Adversum" Email - barspeed@hotmail.com The Rover Mini Se7en Register - http://www.geocities.com/minise7en2001/ Barspeed Mini`s - http://www.barspeed.co.uk/ Barspeed Mini`s Group - http://groups.yahoo.com/group/barspeed Barspeed Classic Cars - http://www.geocities.com/barspeed3 If you have received this email in error please click below. http://www.nobodyhere.com/justme/nose.php3 > I normally use my 1968 Mini to go to and from work. My No. 1 Spark Plug (the > one nearest the radiator) fouls up very often and the car then chokes. It > clears up after I have taken the car for a fast run in the motorway. What is > the reason for only the No. 1 plug fouling ? Can it be rectified ? Hi, There's an old trick which comes from the far distant days of side valve engines to prevent plug fouling. It does not cure the cause, but it will keep you going until you can overhaul the engine. Right, here goes: take a length of spare plug lead, long enough to reach the plug and a little extra. Cut the lead a few inches from the plug end and strip the insulation off for about 3/4 inch. Do the same to the other piece (the piece you just cut off). Take a plastic or bone shirt button and twist one end of the stripped plug lead through one of the holes, Twist the end of the other piece through the other hole. The wires must not be touching. Then just make the lead up with connectors for the Dizzy cap and the plug. Remove the plug lead from no 1 cylinder and replace with your modified one. When you have repaired the original problem you can refit your original plug lead. K > Hi, > There's an old trick which comes from the far distant days of side [quoted text clipped - 14 lines] > > K Hrm, I really can't visualise that, but it sounds interesting - anychance of you doing a sketch and putting it on a website somewhere? Cheers Stuart hi, I don't have a website yet, but if you leave me for a while, I will make a sketch, scan it and post it keith Hi Keith. I would be happy to work on a web site for you and with you. I think of all the people on this group you have the most practical and easy to understand information to share. It would be nice to document it. David > hi, > I don't have a website yet, but if you leave me for a while, I will make a > sketch, scan it and post it > > keith Hi, Sounds like a good idea, David. Talk to you tonight, if my newsgroups work. I have been having troubles lately, sometimes it works, and sometimes it doen't. Keith > hi, > I don't have a website yet, but if you leave me for a while, I will make a > sketch, scan it and post it > > keith If you need webspace to post it to, you are welcome to e-mail the file to me and I'll stick it on DSN's server and post the URL to this thread. SignatureRgds Steve steve@dsnclassics.co.uk www.dsnclassics.co.uk HGi I will do that later tonight, but I understand David in Chicago has saved some of my last tips. Keith This I imagine is to produce a bigger spark all at once when the gap is bridged??? If so resistor leads nowadays do the same thing???? Right or wrong??? rob > Hi, > There's an old trick which comes from the far distant days of side valve [quoted text clipped - 14 lines] > > K > This I imagine is to produce a bigger spark all at once when the gap is > bridged??? A gap in the HT lead increases the voltage before a spark forms. > If so resistor leads nowadays do the same thing???? Resistor leads reduce the current and the electrical noise. > Right or wrong??? Wrong. |
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