engine sputtering under load

[patricke1971]

I have a 1600 dual port with an weber progressive 2bbl. I just picked up the machine and cant seem to get it running..I timed it replaced cap rotor plugs and wires.. it will idle perfect but when you take it out on the road it hesitates, stepping down on the gas it brakes down and misses and pops and 4th gear has no power and slows down even floored. it had a dizzy 009 which looks to be kinda new..I set the points...I havent checked the valves yet.. thats tonight

any thoughts?

[madmike]

Could be a few things , like bad new plug wires,, wrong jetting in the carb ? post a pic of the motor,sometime things just 'stick out' to us
_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

[BFB]

well your going to get a bunch of helpful responses but be prepared for the barrage of " those carbs are junk", and "you need to preheat center mount carbs " comments.
me personally, I like the 32/36 and have had them on several buggies and currently run a 38/38 on a boosted 2021.
rebuild kits are cheap and those carbs are easy to do, rebuild that carb and clean out all the ports. look up redline and they should have a pdf on rebuilding and tuning.
first off , no matter what carb, make SURE valves are set & ignition is good. I couldn't count how many buggies I've worked on that ppl were sure had a junk engine and all it needed was tune up and valves set.
just my 2 cents..
_________________
Forced induction can overcome a lot of obsticles that gets in it's way
"You are the Engineer and the Mechanic.  
Build it your way not the way someone else does it. Their way might not work for you." - clonebug
An interesting thing happens in forums where everyone starts parroting the same thing and "common knowledge" takes over.
“ The monkey see monkey do mentality seems to run deep in VW people. "Gene Berg said it was so 30 years ago so thats the way it is" “ - bdkw1

[patricke1971]

ok I will look at the valves, also it wont rev up in gear without breakdown

[jeffrey8164]

My guess is that the carb needs some love.
Or you could have some intake leaks, leaky heads, broken or worn lifters, no preheat on the manifold, bad distributor, bad coil. I’m sure someone will add to the list.
I ran one through 3 different engine combinations (1679, 1776 and 1915). Every time, the carb needed some love.
Take out the jets and take note of their values.
Might be able to help you from there.
_________________
Volkswagen!
Turning owners into mechanics since 1938.

“Let he that is without oil throw the first rod”
(Compression 8.7:1)

[patricke1971]

it has a 009 dizzy and I think the dist is bad..the points wont more, I have an old one on my shelf and the points more on the plate they are mounted to but the one in the car wont move at all

[Mikedrevguy]

Has the car ever run good? When? Anything change?
_________________
74 1303 (RevBug): plan for German Look
76 914 with 2260
79 VW Iltis
69 Bwajaja
"The wise speak because they have something to say; while the foolish speak because they have to say something." Plato

Illigitimi non-Carborundum!!

[oprn]

[Lingwendil]

[VWporscheGT3]

[houserjw]

You have a few things to look at that could be the problem but don't forget that a bad condenser can make you pull your hair out and it's a simple replacement.

[mikedjames]

If its all new to you, I would start with cleaning up the carburettor, checking for blocked jets. Check for air leaks. Generally check for everything being tidy.

But to me, it sounds like yet another badly jetted progressive carburettor, without heat ...

It will work better with an SVDA once you tune it up some.

I am fairly happy with mine in my bus, but it took a while with a permanently fitted PLX Devices AFR meter, and reinstalling all the stock air cleaner and hot air feed.

Engine bay

Foot off gas, engine braking ..

_________________
Ancient vehicles and vessels

1974 VW T2 : Devon Eurovette camper with 1641 DP T1 engine, Progressive carb, full flow oil cooler, EDIS crank timed ignition.
Engine 1: 40k miles (rocker shaft clip fell off), Engine 2: 30k miles (rebuild, dropped valve). Engine 3: a JK Preservation Parts "new" engine, aluminium case: 26k miles: new top end.
Gearbox rebuild 2021 by Bears.

1979 Westerly GK24 24 foot racer/cruiser yacht Forethought of Gosport.
1973 wooden Pacer sailing dinghy

[NJ John]

I once replaced my engine with a slightly more modified one. I transferred my bud spray from engine to the other and figured it would require a bigger jet. Spottered like crazy top end. Went back to the jets I was using and it ran great.
No experience with progressive carbs, though.
_________________
1973 standard, yellow, lowered, 3” narrowed front, 1600 blo-thru turbo w/single dell 15.4@86, so far
11.41 et buggy. Long gone
Let’s go O’s! Let’s go O’s!
https://www.youtube.com/@AirSpooledGarage

[Ohio Tom]

Too lean up top....

Or, weak ignition.

Even a good working stock ignition won't keep a HiPo VW motor lit.

Most times, I recommend going to an MSD box or similar high energy ignition to keep the cyls lit at WOT.

Also, you can try going to a smaller plug gap.. If this helps, then you know for sure it's ignition related.

[NJ John]

Kinda the opposite of what I said. 🤷🏻‍♂️
_________________
1973 standard, yellow, lowered, 3” narrowed front, 1600 blo-thru turbo w/single dell 15.4@86, so far
11.41 et buggy. Long gone
Let’s go O’s! Let’s go O’s!
https://www.youtube.com/@AirSpooledGarage

[madmike]

Tom is spot on with a weakass Ignition,, had spark blow out on my Bug ,, until I closed the gap,, was chasing my tail on that for a while
_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"