1776 Dual Carbs Running Issue Gas Starvation? SOLVED

[74 Thing]

Did you look in the fuel tank and verify there was nothing in it that floats around and blocks the outlet when you drive?

Otherwise I am starting to lean towards Dale's thought that it may be ignition related. The old Smokey Yunick quote that "90% of all carburation problems are ignition."

[Goostas]

[Goostas]

I just got done checking the carbs, floats, jets, the whole lot.
Everything looks a-okay. Float needles are doing what they're supposed to be doing and the fuel inlet screens are clean.

[andk5591]

Timing goes to shit means what? Is the plate holding your points module tight? When you set your timing, does it come up smoothly and stay steady when its maxed out? Should be set between 28 and 32 degrees.

My experience with points modules is that they either work or they don't, BUT there is a cheapy in my parts box that I had tried out quite a few years ago that I had replaced with a Pertronix for some reason....Don't remember why. But if it was dead, I would have just thrown it out....The more I am thinking about it, I think the timing was eratic.....But not sure.

There was also a sitiuation that I had once where the trigger plate on a Comufire (I think) was not snug.

If you have points and condensor, I would suggest swapping them in and see what happens
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D-Dubya Manx clone - 63 Short pan,1914.
Rosie 65 bug - My mostly stock daily driver.
Woodie 69 VW woodie (Hot VWs 7/12).
"John's car" 64 VW woodie - The first ever
Maxine 61 Cal-look bug - Cindy's daily driver.
Max - 73 standard Beetle hearse project - For sale
66 bug project - Real patina & Suby conversion
There's more, but not keeping them...

[Goostas]

[Agent47]

What ignition system are you running? From the coil, distributor, plugs? This all sounds like a bad condenser to me.
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[Goostas]

[andk5591]

OK - how big of a swing is timing and about how much of a change in idle speed.

If the car is pretty much stalling out and the idle speed is fluctating between like 500 and 1000 RPMs, the timing should not be changing at all because the mechanical advance isnt in a range where it would be advancing...

I think you are getting close to nailing this down.
_________________
D-Dubya Manx clone - 63 Short pan,1914.
Rosie 65 bug - My mostly stock daily driver.
Woodie 69 VW woodie (Hot VWs 7/12).
"John's car" 64 VW woodie - The first ever
Maxine 61 Cal-look bug - Cindy's daily driver.
Max - 73 standard Beetle hearse project - For sale
66 bug project - Real patina & Suby conversion
There's more, but not keeping them...

[Goostas]

[andk5591]

swapping the distributor is a GREAT idea... Make sure the spring is on the top of the drive gear.
_________________
D-Dubya Manx clone - 63 Short pan,1914.
Rosie 65 bug - My mostly stock daily driver.
Woodie 69 VW woodie (Hot VWs 7/12).
"John's car" 64 VW woodie - The first ever
Maxine 61 Cal-look bug - Cindy's daily driver.
Max - 73 standard Beetle hearse project - For sale
66 bug project - Real patina & Suby conversion
There's more, but not keeping them...

[Goostas]

I swapped my Bosch 010 Dizzy w/ Petronix I with my buddies unnamed 009 w/points and I couldn't get the engine to start.

I borrowed a Petronix II electric points and swapped it with my Petronix I, thinking my Petronix I might be burnt out (I recently found out that they can be burnt out with with ignition switch on without the engine running!).

After I installed the Petronix II a NEW problem has shown up, it idles fine and is drivable BUT during very low rpms (pulling away and below 2500,3000 rpm) the car "bucks" and hesistates pretty badly. I can drive it and hold speed, however.

During higher RPMs however, it seems to smooth out and no more bucking.

Any ideas? It has been cold down here in TX, I didn't run the engine for a week or so, maybe the idle circuit on the carbs got gunked up? Also a new battery cause the old one died.

[andk5591]

Yes - you can fry a points module if the key is left on and its in a "fire" position. Assuming that your timing is now stable? You had said it was very eratic intermittently.

But here was your original problem:

[Goostas]

[andk5591]

The car sitting for a week would not cause that. Ours got parked about a month ago and wont be run again until maybe March. I use fuel stabilizer, but they will not require carb cleaning or anything in the spring. Maybe time for a new fuel filter?
_________________
D-Dubya Manx clone - 63 Short pan,1914.
Rosie 65 bug - My mostly stock daily driver.
Woodie 69 VW woodie (Hot VWs 7/12).
"John's car" 64 VW woodie - The first ever
Maxine 61 Cal-look bug - Cindy's daily driver.
Max - 73 standard Beetle hearse project - For sale
66 bug project - Real patina & Suby conversion
There's more, but not keeping them...

[Goostas]

Hmm, maybe. There's a pretty fresh fuel filter on it. Easy enough to swap out.

The weather dropped below freezing during the Ghia sitting. I didn't have any fuel stabilizer in it, and it was outside. Maybe the perfect storm?

I did have to reset my idle speed though which seemed odd. But it was a heck of a lot colder.

[mikedjames]

Replacing a fuel filter can break off rubber crumbs in the end of the hose meaning that you got dirt in it because you changed the filter... and cutting fresh fuel hose makes crumbs if you do not clean it out.
.. Sometimes I have to clean out the carb twice after changing hoses or the fuel filter.
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1974 VW T2 : Devon Eurovette camper with 1641 DP T1 engine, Progressive carb, full flow oil cooler, EDIS crank timed ignition.
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