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 jjwebb123
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 posted on May 15th, 2010 at 11:07 AM |
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plugs 1 & 2,black.HELP
Hi Guys.
Why would the plugs on cylinder 1 & 2 be black and the others are not as bad. ? we have new coil new dizzy new plugs new leads,new carb.What could
it be.?Here is a pic.
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"A car for the people, an affordable Volkswagen, would bring great joy to the masses and the problems of building such a car must be faced with
courage."
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waveman1500
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| posted on May 15th, 2010 at 11:46 AM |
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The obvious answer would be if you had twin carbs and one of them was set too rich, but I assume that you don't have twin carbs. Failing that are
there any manifold leaks at the rubber boots or mounting faces? Anything that could alter the fuel mixture from one side to the other?
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 Bizarre
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| posted on May 15th, 2010 at 12:18 PM |
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i agree - lean on one side and carb richened up tp try and compensate
Either rubber boots or actual manifold gasket
Futue te ipsum!!!
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jjwebb123
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| posted on May 15th, 2010 at 04:21 PM |
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Oh ok .Um im running only one carb,so that rules out one thing.Im not entirely sure what the rubber boot is? or mounting faces?
is that the bit of rubber under the actual manifold at the heads? would more air,lessen the ammount of fuel burnt or something like that,causing
the blackness on the spark plug.
Thanks So Much.
"A car for the people, an affordable Volkswagen, would bring great joy to the masses and the problems of building such a car must be faced with
courage."
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waveman1500
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| posted on May 15th, 2010 at 04:59 PM |
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The rubber boots are the parts that connect the manifold centre to the ends on a twin-port factory manifold, like this:
If you have one of these manifolds, check the rubber parts aren't cracked or leaking. If you have a single-port manifold then it won't have any
manifold boots, so all you need to check is that there are no holes/cracks in the actual manifold, and that there are no leaks at the gaskets where it
joins to the heads.
As Bizarre said, the reason it would cause blackness on one side would involve someone tuning the carb to be too rich, to try and compensate for the
air leaks. The air leaks lean out the side with the leak, making that one burn fine, but the side without a leak will burn too rich and blacken the
plugs.
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1303Steve
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| posted on May 15th, 2010 at 05:26 PM |
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Hi
Is it a single port? Beside that you could have the preheat burning through the manifold, seen it happen before.
Steve
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jjwebb123
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| posted on May 15th, 2010 at 10:28 PM |
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like i said it is a single port.and there is no leaks in the actual manifold.there could be a possibility that there might be a leak at the heads,but
not sure.
Anything else that could be causing it?
"A car for the people, an affordable Volkswagen, would bring great joy to the masses and the problems of building such a car must be faced with
courage."
Adolf Hitler At opening of 1934 Berlin Auto Show
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Bizarre
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| posted on May 16th, 2010 at 10:33 AM |
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not really - pretty hard to get unequal mixture to either side from a single carb
Get it idling then spray liberal amounts of WD40 the manifold head join and see if idle changes
Futue te ipsum!!!
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jjwebb123
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| posted on May 16th, 2010 at 01:37 PM |
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Ok,so sprayed the manifold with wd40 got no response maybe just a little one on top of the manifold.Will have to remove the manifold.not that i want
to.
we noticed also that the right hand side where the plugs were black,the manifold was really hot.on the elbow.Compared to the other side you could cook
an egg on there.Why would it be sooo hot.?
"A car for the people, an affordable Volkswagen, would bring great joy to the masses and the problems of building such a car must be faced with
courage."
Adolf Hitler At opening of 1934 Berlin Auto Show
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jjwebb123
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| posted on May 16th, 2010 at 04:11 PM |
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i also forgot to mention the reason,we had the plugs out is becuase it has a flat spot when you give it some power.
so we are trying to determine the cause of that.
"A car for the people, an affordable Volkswagen, would bring great joy to the masses and the problems of building such a car must be faced with
courage."
Adolf Hitler At opening of 1934 Berlin Auto Show
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57oval
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| posted on May 16th, 2010 at 06:08 PM |
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Check your preheat pipe is not blocked causing manifold to hot on one side
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jjwebb123
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| posted on May 16th, 2010 at 07:16 PM |
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| Quote: | Originally
posted by 57oval
Check your preheat pipe is not blocked causing manifold to hot on one side
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yeeeh i dont think that is it.it backfires a little too,so does that indicate un burnt fuel.really stuck for ideas.
"A car for the people, an affordable Volkswagen, would bring great joy to the masses and the problems of building such a car must be faced with
courage."
Adolf Hitler At opening of 1934 Berlin Auto Show
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jjwebb123
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| posted on May 17th, 2010 at 12:27 PM |
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b...b..bump
"A car for the people, an affordable Volkswagen, would bring great joy to the masses and the problems of building such a car must be faced with
courage."
Adolf Hitler At opening of 1934 Berlin Auto Show
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Bizarre
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| posted on May 17th, 2010 at 01:04 PM |
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Only thing i could suggest now is swapping manifolds
possibly a small crack somewhere in the manifold???
Futue te ipsum!!!
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mickey_0789
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| posted on May 17th, 2010 at 01:07 PM |
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Have you done a compression check to make sure the head gaskets are bugger or leaking? One of my plugs were doing (still are) doing the same, but
thats cause one of my valves are gone.
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Joel
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| posted on May 17th, 2010 at 05:28 PM |
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vws dont have any form of headgaskets
i'd first try a new head to manifold gasket but failing that best be would be try another manifold
like steve said you could have a hole blown into it internally from the preheat pipe
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jjwebb123
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| posted on May 17th, 2010 at 06:26 PM |
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taking the manifold off tonight to check for cracks and gasket leak.there is nothing else really.i appreciate all your help.
Will keep you posted.
"A car for the people, an affordable Volkswagen, would bring great joy to the masses and the problems of building such a car must be faced with
courage."
Adolf Hitler At opening of 1934 Berlin Auto Show
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jjwebb123
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| posted on May 21st, 2010 at 05:55 PM |
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OKAY...SO A LITTLE HELP!!!.
Is there an easy way to take the manifold out without taking the fan housing off.i can lift it up but then it hits the housing.
A spark plug lead broke the other day too. this car just does
not want to run.
please help 
"A car for the people, an affordable Volkswagen, would bring great joy to the masses and the problems of building such a car must be faced with
courage."
Adolf Hitler At opening of 1934 Berlin Auto Show
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Bizarre
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| posted on May 22nd, 2010 at 07:46 AM |
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Not really
The heat risers get in the way
If you have bolts in stead of studs on the alternator base then it may be possible
Futue te ipsum!!!
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matberry
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| posted on May 22nd, 2010 at 10:33 AM |
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In car can be done, but a real pita. Deck lid and hinge brackets off, fan and alternator out, fan housing off, manifold off......
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
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jjwebb123
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| posted on May 22nd, 2010 at 02:47 PM |
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OMGnot happy jan.matberry do you have a guide to that technique
like step by step.
i really do not want the engine out.
"A car for the people, an affordable Volkswagen, would bring great joy to the masses and the problems of building such a car must be faced with
courage."
Adolf Hitler At opening of 1934 Berlin Auto Show
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matberry
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| posted on May 22nd, 2010 at 06:31 PM |
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That was step by step.
Give me a call, I'll talk you through it.
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
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waveman1500
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| posted on May 22nd, 2010 at 11:35 PM |
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Personally I would just take the engine out, it's a lot easier. With a decent floor jack, a really big pair of jackstands and the help of someone
who's done it before, you can easily have a Bug engine out of the car in 15 minutes. It saves a lot of contortionist wrangling in the engine bay. If
you've had a lot of practice, you can do it much faster!
http://www.youtube.com/watch?v=gKF6dcKjLJo
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jjwebb123
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| posted on June 3rd, 2010 at 08:48 PM |
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yeh i know mate,but just really dont have the gear for an engine removal.One day i hope to be that good tho.lol
We got it all out,took the deck lid off,made it alot easier.umm i have new gaskets for the manifold,to be put on.I also have checked the manifold
and
from all the testing we could not find any leaks in the manifold it self.(surprisingly)
just wondering if its not the manifold,could it be the valves?
causing a flat spot.?
"A car for the people, an affordable Volkswagen, would bring great joy to the masses and the problems of building such a car must be faced with
courage."
Adolf Hitler At opening of 1934 Berlin Auto Show
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