34-PICT-3 Bypass screw does nothing after pertronix install

RyantheBusMan

I have a 71 Super Beetle that was idling fine. I then installed a Pertronix Ignitor 2 electronic ignition. After this unit was installed my idle speed jumped up substantially. I attempted to reduce my idle speed using the bypass screw, but I can screw it all the way in and the idle speed doesn't decrease and the car doesn't die. It appears the choke is working fine. After the carb is warmed up the butterfly is standing straight up.

Any ideas of what I might be missing or how I can fix this?

busdaddy · Posted: Thu Jul 23, 2015 6:05 pm Post subject:

Did you reset the timing?
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RyantheBusMan · Posted: Thu Jul 23, 2015 6:14 pm Post subject:

The timing was set at the garage a couple weeks ago, but not since I added the electronic ignition. I don't have the tools to set the timing so I think it need to take her back to the shop.

Do you think it would be okay to drive her to the shop with the idle running fast? It's about a 30 minute drive.

OLD VW NUT · Posted: Thu Jul 23, 2015 6:29 pm Post subject:

The reason for your fast idle is the ignition timing is way off. You can't just throw new parts in the engine and expect it to work without adjustments made. Don't drive it for 30 seconds much less 30 minutes if you like your motor. Go rent a timing light and someone that can use it before driving your car. Post the distributor model - this is very important in knowing how to time and which marks to use. Even better is get to know your car - learn how to time it - you'll only need to do it once. Thats the beauty of the 'electronic' style ignition.

FWIW I doubt that screw you were screwing with would have done much prior to installing the pertronix - one has nothing to do with the other. One is fuel - the other is fire.
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kreemoweet · Posted: Thu Jul 23, 2015 9:38 pm Post subject:

If the engine is running at all with the bypass screw all the way in, then either (1) your throttle butterfly is not completely closed at idle like it is supposed to be, or (2) you have a
serious vacuum leak somewhere. (1) can be solved by adjusting your carb the way it's supposed to be (details in your Bentley manual), (2) will require hunting down and
correcting the leak or leaks, which can occur in many places.
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carsdlt · Posted: Thu Jul 23, 2015 10:16 pm Post subject:

Dude...its your timing. Re-set your bypass screw to specs and put your timing mark to where it should be.
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carsdlt · Posted: Thu Jul 23, 2015 10:17 pm Post subject:

Dude...its your timing. Re-set your bypass screw to specs and put your timing mark to where it should be.
_________________
Thanx, DLT
'73 181 stock 1600 - "Dr. Bombay"

"If it works, don't fix it....let it break on its own."

Bob Brugge · Posted: Fri Jul 24, 2015 9:37 am Post subject:

RyantheBusMan · Posted: Fri Jul 24, 2015 9:45 am Post subject:

I have a a SVDA distributor and I picked up a timing light today. I was following the instructions I found on YouTube, but I can't get the light to turn off when a I spin the distributor. It says on no matter how far I spin it in either direction.

What would cause the test light to say on in ever position?

Randy in Maine · Posted: Fri Jul 24, 2015 9:51 am Post subject:

Is this a real timing light with a strobe that hooks up to the battery and also the #1 spark plug wire?

That is what you need.

RyantheBusMan · Posted: Fri Jul 24, 2015 9:52 am Post subject:

No this is the cheap test light that connects to the negative side of the coil.

Randy in Maine · Posted: Fri Jul 24, 2015 9:54 am Post subject:

Well that is not going to work.

Find something that looks more like this.....

Image may have been reduced in size. Click image to view fullscreen.

DuaneL · Posted: Fri Jul 24, 2015 10:04 am Post subject:

RyantheBusMan · Posted: Fri Jul 24, 2015 10:16 am Post subject:

I'm going to go pick up a timing light gun. What should it be set at for a svda distributor?

Randy in Maine · Posted: Fri Jul 24, 2015 10:37 am Post subject:

What kind of timing marks does your pulley have? My 71 Super came witha DVDA that was timed to the notch which was at 5º ATDC.

In general we hook up the timing light correctly first. Then we remove the vacuum hose(s) and rev up the engine until the centrifical advance no longer advances even if you give it more gas (it will be around 3500 RPMs or so). Make that point to be 30º BTDC +/- 2º.

Do it a couple of times so you will know it is correct. Let it loaf back to idle and hook up the vacuum hose(s). Set the idle to about 850 RPMs.

GO for a ride and see if the engine likes that.

Randy in Maine · Posted: Fri Jul 24, 2015 11:58 am Post subject:

So this horse walks into a bar and says to the bartender,

" I would like a cold beer and a deck of cards...."

sjbartnik · Posted: Fri Jul 24, 2015 12:23 pm Post subject:

DuaneL · Posted: Fri Jul 24, 2015 12:24 pm Post subject:

glutamodo · Posted: Fri Jul 24, 2015 12:25 pm Post subject:

RyantheBusMan · Posted: Fri Jul 24, 2015 12:38 pm Post subject:

These may be silly questions, but I've never worked with a timing light gun before.

Does the timing gun show the idle RPMS?
Where should my timing mark be when it is set correctly?

This is a screen shot from a YouTube video I was watching. Is this what I'm trying to accomplish?

Note that I have a 71 Super Beetle with a SVDA distributor. [/img]


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34-PICT-3 Bypass screw does nothing after pertronix install
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