72 Beetle Missfire

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Viper999
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Joined: Tue Apr 24, 2018 11:06 am
What model do you have?: Beetle 1972
Location: Brakpan
Flag: South Africa

72 Beetle Missfire

Post by Viper999 » Wed Apr 25, 2018 11:29 am

Hi All
I am new on the group so please forgive me for asking questions asked many times before.
My daughter bought a 72 beetle in good condition so as you know now its dads problem to keep it running.
So here we go
She starts fine and idles good but as soon as she warms up she starts to misfire while driving a constant speed and gets worse the longer you drive.
I have replaced the carb.
I see the distributer shaft has a lot of up and down play is this normal?
Please help my neck wont survive another trip.
Regards
Ian



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retrovan
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What model do you have?: 52T1,68FB,72Bay,75FL
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Re: 72 Beetle Missfire

Post by retrovan » Wed Apr 25, 2018 11:38 am

Welcome and I am sure the two of you will enjoy your new toy.

Two areas to look at, one, is to pull the spark plugs and see if they wet after the run.

If so replace them with NGK, clean the distributor cap contact points inside or replace the cap with new. (old may be cracked)

You may want to clean your points contacts with emery paper as well.

I would be skeptical to change the points or condensor as the new ones are junk and may not work from the start.

Do all these things, and if still not right, change the condensor and coil.

Then I would look at your fuel filter, see if it is dirty, or blocked, could also be the filter in your tank inside the tank out let to the carb.

Good luck

Herman
1952 Split Beetle 1835cc twin 34ICT's (Azure Blue)
1968 Fastback (2Lt.type4)twin 34ICT's( Red)
1972 Low Light Bay Panel Van (2Lt type 4)twin 34ICT's(White)
1975 Fleetline Panel Van 1914cc twin 34ICT's(Aqua Blue/White)

Viper999
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Posts: 3
Joined: Tue Apr 24, 2018 11:06 am
What model do you have?: Beetle 1972
Location: Brakpan
Flag: South Africa

Re: 72 Beetle Missfire

Post by Viper999 » Wed Apr 25, 2018 11:48 am

Thx Herman
Will do as you suggested.
The distributer must the shaft have that play up and down?

Ian

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retrovan
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Re: 72 Beetle Missfire

Post by retrovan » Wed Apr 25, 2018 4:39 pm

Viper999 wrote:
Wed Apr 25, 2018 11:48 am
Thx Herman
Will do as you suggested.
The distributer must the shaft have that play up and down?

Ian
Normally not a problem, if not too much.

Drop a few drops of engine oil in the hollow shaft after removing the rotor, this will service the shaft, and let it run smooth.

Herman
1952 Split Beetle 1835cc twin 34ICT's (Azure Blue)
1968 Fastback (2Lt.type4)twin 34ICT's( Red)
1972 Low Light Bay Panel Van (2Lt type 4)twin 34ICT's(White)
1975 Fleetline Panel Van 1914cc twin 34ICT's(Aqua Blue/White)

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