jashiggins

I recently changed sparkplugs on my 78 vert.  Before I changed them the engine ran pretty good.  (But since just bought in the fall, I'm going over all the maintenance stuff getting it ready for the spring and summer.)  After, it sputters and loses power when putting pushing the gas pedal on medium acceleration.  I then checked the fuel filter, replaced it, drained and cleaned the tank, put on new spark plug wires, then I was going to check the spark plugs again.  I pulled out the old ones from the trash and found the gap to be set on 3 of the 4 I could find at 024.  When I put new ones in I set them at 028 as the bentley manual states.  I'm in the process of setting the new ones back to 024 to see if that makes any difference.  Any other thoughts would be greatly appreciated.  BTW- I have already checked the distributor and rotor cleaned all the contacts already.  Thanks

 

Jason

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68autobug

Hi Jason,

One of My Workshop/owner manuals [I have 10 different ones] says that the gap should be between .024" & .028" and the best idling comes from the .028" gap, and a plug with the smaller gap will miss less at high speeds....  so it looks like the smaller gap is the way to go..

It also says You can take the gap down to .020" in very cold weather for easier starting.... and also suggests setting the plugs at .026" which is the middle of the range....   Spark plugs normally wear the electrode away, so Your old plugs should have had a larger gap than .024" ... because of the wear....  so maybe Yours were set at .022" approx when they were installed....

What spark plugs are You using?   Beru 145/14   Bosch W145/T1 or maybe NGK which are very popular these days in all vehicles...

I can't remember the NGK plugs number...

 

Lee Noonan    68AutoBug   Australia

 

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68AutoBug - helping keep air cooled Volkswagens alive in Australia & around the World -

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jashiggins

I pulled 185 bosch supers out not sure what I put in.  It seems to run a little better but still sputters at .024  I will pull them again and lower the gap to .022 to see if that makes a difference.  Also found out that my battery is bad.  Would that cause the sputtering at higher rmps also.  I also want to know what plugs I should put in for my 78.  Thanks for your information. 

 

Jason

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68autobug

I did find in one owners manual where the correct spark plug is a Bosch

175 plug  - 145 for cold climates, so 185 would be for very high temperatures... although I've only used 175, and We have very high temps in the summer... 105F.. I have found some bosch W5AC supers but what they fit, I'm not sure.. they sure do look like VW plugs.....

Pull a plug out and rest it on the engine and then turn the engine over and make sure You have a nice fat spark...

You might need a pair of multigrips with insulated handles to do this...

 

Something else just comes to mind - A Coil can be connected up incorrectly... and it will work, but not too well....

make sure the power goes to the + side...

  the - goes to the distributor...[condenser] side..

There should be enough spark in a normal coil to spark across .028"

easily...  I can't remember if You replaced Your coil....

I hope this is of some help...

 

Lee Noonan   68 AutoBug  Australia

 

http://community.webshots.com/user/vw68autobug

 

 

 

68AutoBug - helping keep air cooled Volkswagens alive in Australia & around the World -

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Wayne

I've ran NGK and Bosch and had found that the NGKs performed better and lasted longer. The biggest mistake I made was trying the Bosch platinum. They fouled and my Super ran terrible on them.

 

I'd also suggest installing an electronic ignition in your vert if you want a good strong spark and smooth acceleration. With the Pertronix ignition you actually have to open the plug gap and little wider than normal. 

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jashiggins

Wayne,

Can you let me know what ngk plugs you run, and what gap.  Thanks

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Tobra

The petronix points replacement is the single best modification I have ever made to any car.  Are you sure you did not mix up your spark plug wires?  NGK makes a nice plug.

 

I have gotten a bad cap one time that made it run crummy.

'79 Super Beetle Convertible, Topline Sport+ springs and disc brake conversion. SS brake lines, KYB GR-2struts and Gas-a-just shocks
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Wayne

I run NGK B6HS. The stock gap is .024 but you should open them up to .030 with a Pertronix ignition installed.

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68autobug

I agree, I believe NGK make the best spark plugs.... for everything...

 

I have used BERU over the years and have them in My beetle now...

Beru are german made, and were used by most VW shops many years ago...

Bosch were making their plugs outside Germany and I've heard many bad things about them... I believe they are making them again in Germany...

 

My Son had an problem with His Beetles engine... turned out to be a loose condenser on the outside of his distributor....

 

Have a Happy Easter everyone...

 

Lee - 68AutoBug  - Australia on Good Friday -

 

http://community.webshots.com/user/vw68autobug

 

 

 

68AutoBug - helping keep air cooled Volkswagens alive in Australia & around the World -

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jashiggins

Wayne, and Lee,

 

Thanks for all the input.  I just put in ngk b5hs with gap at .024.  Runs like a champ no sputters.  Thanks for all the input.  I will look into the electronic ignition. 

 

Jason

78 Vert.

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68autobug

Hi Jason,

Good to see You have Your 1303S Karmann Super going again..

like it should.... Happy Motoring....

 

Here is a pic of a 1303S Karmann convertible at a VW Show I attended

yesterday... it doesn't have shock absorbers in the bumpers so I

presume its an import from the UK or Japan...

No karmann convertibles were ever sold in Australia..

so they are very rare... there was one from the US last year....

still Left Hand Drive....

 

Lee Noonan    68AutoBug    Australia

 

http://community.webshots.com/user/vw68autobug

 

68AutoBug - helping keep air cooled Volkswagens alive in Australia & around the World -

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