rough running 1967 bug

bigbuglover67 · Posted: Thu Mar 20, 2008 8:54 pm Post subject: rough running 1967 bug

i have a 1967 bug with a 1641cc, 31pict carb, and electronic igniton. it starts up, runs then dies. only on certain occasions like early morning or after i drive it. it also wont line up when timing. its very advanced and kinda sputters. so if anybody could maybe help me out on any suggestions. feel free!

thanks
Kyle Very Happy

Hotrodvw · Posted: Thu Mar 20, 2008 9:29 pm Post subject:

What distributor and ignition ssytm are you using? What are you trying to set your timing at?
_________________
'67 Sunroof
Eric

78x94 with IDA's....oober fun

Horsepower is an addiction........Addictions cost
lots of money!

Hose & Fittings

randini · Posted: Thu Mar 20, 2008 10:07 pm Post subject:

Kyle,

Lots of info you left out but I might be able to pare it down a touch.

When I got my '67 1600 Bug it had a 31pict carb and never ran right. After moving to a new town I found a local shop that was willing to give free info to somebody asking for it (they now get every bit of my business I can give them). They told me the 31pict was used on the Bus and never worked well on a Bug, but I don't recall what they told me as to why I should replace it. They swapped me straight-across for a 30pict-1, sold me a rebuild kit for a few bucks, and I love it. You should consider the opinions of the more knowedgeable gents on this forum but I think replacing the carb would be a good place to start.

If you can sometimes drive it for awhile before it craps out I would think that the fuel system might not be at fault, other than something really off-the-wall stuff you can look for after the reasonable junk has been done.

What's the make of your electronic ignition, how old is it, and has the polarity ever been reversed on it? Find a conventional dizzy and see if that makes a difference. I run a .009 dizzy (yeah, I've read the rants but it works well for me) and if the carb change and the dizzy change each help, you shouldn't be too far from home.

Good luck, and please keep me posted as to how it goes.

-Randy

bigbuglover67 · Posted: Fri Mar 21, 2008 1:50 pm Post subject:

yea i think im goin to buy a bigger carb cause what the ppl in modesto did wqas put a space/adapter for the 31pict to fit on the dual port. but my auto shop teacher said that electronic ignition sucks on bugs. and i beleive who installed it put it on backwards?

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johnanddes · Posted: Fri Mar 21, 2008 6:07 pm Post subject:

not to mention your belt is on backwards too. but thats here nor there. a 30/31 will work okay as well, and from the looks of it you have a 009, which the 30/31 carb works better with than the 34. You should switch the 009 to a SVDA (single vacuum dual advance) dist, that way you have the pleasure of a vacuum dist with the mech. end of the 009. Also, the 34 PICT-3 will work great with the SVDA, but like i said earlier, it will work pretty poorly with the dist you have now. combined from aircooled.net, probably a 400 price tag, but worth it in the end.
_________________
John

1969 documented numbers matching bug
1968 F250

Keepin the ISS from colliding with space junk

bigbuglover67 · Posted: Fri Mar 21, 2008 6:13 pm Post subject:

is that distributor on backwards btw ? many ppl say it is but im not sure. when the motor is shut off the rotor points to the number 3 cylinder? so im not sure. but im looking at a website right now on 009s and it says u have to adjust the timing at 3000RPM'S at 28-30BTDC and it even says with this dist. you will have flats spots and poor pick up. so i think i will take your advice and get the SVDA and maybe the new carb a little later on.

thanks.

johnanddes · Posted: Fri Mar 21, 2008 6:20 pm Post subject:

bigbuglover67 · Posted: Fri Mar 21, 2008 6:34 pm Post subject:

yea thats pointing towards the number 3. so with it in backwards it shouldn affect perfformance or anything ?

bigbuglover67 · Posted: Fri Mar 21, 2008 6:34 pm Post subject:

johnanddes · Posted: Fri Mar 21, 2008 7:02 pm Post subject:

nice car, remove the dist and correct it carefully. first though, read how to remove it in a manual, or on www.vw-resource.com if you dont have one.
_________________
John

1969 documented numbers matching bug
1968 F250

Keepin the ISS from colliding with space junk

bigbuglover67 · Posted: Fri Mar 21, 2008 7:53 pm Post subject:

thanks

Hotrodvw · Posted: Sat Mar 22, 2008 12:19 am Post subject:

The belt isn't on backwards. It wouldn't ride in the groove w/o throwing itself off the pulleys if it was. Look closely, the tapered end is inward...
_________________
'67 Sunroof
Eric

78x94 with IDA's....oober fun

Horsepower is an addiction........Addictions cost
lots of money!

Hose & Fittings

jmsmilin · Posted: Sat Mar 22, 2008 1:35 pm Post subject:

belt looks odd to me
_________________
Der Schmutzige Süden.

(o\ ! /o) | o \/ o | (o)=|=(o) [o\|_|_|/o] \m/

66 12volt · Samba Member Joined: February 16, 2007 Posts: 195

It is a belt with ribs on the outside. No real advantage just looks different. I see them on some of the baja bugs i work on.


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