Learning more about VW's...

[oktr6r]

I've been fighting a problem with my '76 not wanting to idle. Rebuilt the carb Saturday morning, and it helped, but still died, mostly when stopping.

I tried the adjustments again this evening, then took it for a short drive, it idled too high. My driveway slopes pretty good, and I'd been pulling it out of the garage, nose down, to run it. I pulled it into the garage just enough to have it sitting level, and the adjustments made a noticeable difference.

Is the 34 PICT 3 that touchy to being level? If so, I will want to replace it, since some of the off-road driving I want to do will be on rough hills.
_________________
Les
'73 Thing - Offroad project
'68 Lightning Bug Baja
'66 Type 1 waiting heart transplant
'60 Baja Volkstruckin' future project
'58 Chassis w/ Beau Hickory Virgo body

Quote from RLAP: "dude i think the last thing you need in your bug is more horsepower, you would only get yourself into trouble"

[Matt Wilson]

is your gas tank vented?
_________________
1972 Standard Beetle
1969 Baja Beetle

[oktr6r]

[57 Rag]

[oktr6r]

[earthquake]

oktr6r/57rag
If your tank is not vented the fuel pump will pull a vacuum in the tank that the pump will not be able to over come and your carb will starve for fuel

Earthquake
_________________
74 CLASS 11 LOOK-A-LIKE
69 DUNE BUGGY
79 INTERNATIONAL SCOUT II
05 SCION XB SERIES RELEASE 2[#437]
95 Chevy C3500 dually
98 Ford E150
Link to Kelly J. Nolte 3/20/53 - 11/6/08
https://time-zonelabs.blogspot.com/p/about-kelly.html
DEATH TO CHINGERS!
[From a military recruitment poster in the novel "The Stainless Steel Rat" By Harry Harrison]

[oktr6r]

[oktr6r]

[Mudcat]

The 34 pict 3 is sensitive to hills. The needle valve in the float bowl tends to stick on hills. When you rebuilt the carb did the rebuild kit come with 2 choices for the washer under this valve? Use the thicker one. The thinner tends to cause flooding when parked on a hill for a long time. Definitely change the filter and check the output of your fuel pump. Are you running the stock exhaust? and are your preheat tubes installed?

[oktr6r]

[Mudcat]

The 34 is a good single carb on a 1600. I asked about the preheat because it is very important on any single carb setup. When you have a chance pull the manifold preheat tubes and ensure they aren't blocked. Also, those tubes heat the manifold the best if there is a low pressure point on one. Plain English. Aftermarket exhaust normally have flanges for these tubes @ 2&4 exhaust ports and that is all wrong. The stock muffler flanges one tube to the muffler, I.E. low pressure point. This creates vaccum and offers full flow from one side to the other regardless of which cylinder is on it's exhaust stroke. Without this vaccum there is less heating of the manifold and the chances of clogged tubes increases. Think about the firing order. 1-4-3-2 Right-Left-Right-Left and before too long dead center right at the center of the manifold blockage. An aftermarket system should be modified so that one tube taps into the 4into1 collector. I have a BUGPACK system I hope to modify soon. Another good cure for carb probs is a good original oil bath air cleaner with the proper preheat setup there also. This may not solve all your probs but is a good base to start troubleshooting with. VW engineers knew exactly what they were doing. It's too bad so many aftermarket companies didn't understand that (or give a shit) when they started building replacement/performance parts for our cars.
In the case of the exhaust systems, they are best suited for dual carb setups and since most are using duals no probs for the majority. My reccomendation is to stick with the 34 or buy a good set of dual solex.


http://66.225.214.60/baja/page8.html

http://www.aircooled.net/new-bin/viewproductdetail.php?keyword2=FSK0060&cartid=

[oktr6r]

I took the car out for a long drive yesterday, a combination of town, highway, and rough dirt roads. The engine runs great at higher RPM's, acts like it's flooding at lower RPM's.

I'm leaning towards fuel pressure as the problem. The basic info:

34 PICT 3 carb
Electric fuel pump, unknown brand
No pressure regulator
1776 engine
Fuel filter up front, by the pump

The fuel filter doesn't seem a likely culprit, as the engine rev's great, with no fuel starvation issues. I can pull out on the highway and run it hard thru all 4 gears, and it pulls strong, no hesitation or stumbling.

I've done a lot of research here, and the general thought seems to be that an electric pump is too much pressure for the carb I'm running. I've ordered the Holley 12-804 regulator, adjustable from 1-4 PSI. I avoided the in-stock Mr. Gasket POS regulator.

Should have the regulator Tuesday, I'll update once it's installed and adjusted.
_________________
Les
'73 Thing - Offroad project
'68 Lightning Bug Baja
'66 Type 1 waiting heart transplant
'60 Baja Volkstruckin' future project
'58 Chassis w/ Beau Hickory Virgo body

Quote from RLAP: "dude i think the last thing you need in your bug is more horsepower, you would only get yourself into trouble"

[oktr6r]