It liiiiiiiiiiiiiivesssss

[Wildthings]

Maybe do a smoke test on the intake air system.

[steve244]

[steve244]

[steve244]

[steve244]

[Wildthings]

If your distributor has a dual vacuum can, put a hose on the nipple which points towards the distributor body and suck on the hose to make sure the can holds vacuum, most will not. If yours leaks, disconnect and plug the hose.

[steve244]

It's a single vacuum can. New rebuild from sparxwerks. He did the throttle body too.
_________________
82 AC vanagon approx 200K miles (3K are mine).
DD is a 2015 Leaf
Road Trip to Hell (FL 2023)
The Vanagon's drivetrain and chassis restomod thread. Best sung to the tune of I Did It My Way...

[danfromsyr]

the T-II sensor is what handles the cold-warm fuel enrichment
it may not be providing a good reading at lower temps
once the T-II is up to a certain ohm output then the ECU looks at the O2 sensor.. (if installed)
w/o an O2 then the ECU goes to 'warm running' mode..

perhaps the T-II is reading too warm too soon..

I presume you have an AFC manual handy

check your TII on page 8
https://www.thesamba.com/vw/archives/manuals/vanag...ystems.pdf

[E1]

I was just going to mention the Temp II, but had no clue if AC uses them.

We once had the wrong one installed by a “pro” — (was black instead of blue) — and it ran very lean.

You might do what I did, Google the part # and see if it fits your engine. I’d be at least a little surprised if your other new parts are bad.
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‘84 Westy, 2.1L with Digijet, 5.43 R+P, GT Gears
"Adding power makes you faster on the straights.
Subtracting weight makes you faster everywhere."
— Colin Chapman

[Wildthings]

[Abscate]

With a reading that lean, vacuum leak

Smoke test is the way to go, burning leaves make lots of smug smog
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.ssS!

[steve244]

[danfromsyr]

I would never play with the AFM without 1st analyzing the TII properties


I had one that was loose in it's hole.. that caused some erratic operating
I've forgotten to hook it up.
I've had the spade short to the intake runners
I've had different TIIs have very different readings Rate/curve

with a wideband O2 an adjustable TII is quite nice.
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[danfromsyr]

as mentioned on a lean/leak scenario
that the intake runner 'couplers' if OG braided can easily look OK but allow too much air in.

that the injector seals are often easily overlooked and degraded
that the intake base/head gaskets may be misaligned and allow a gap.

the EGR port/tube

the cold start injector seal.
the seal under the throttle body if OG is often very suspect.

just spit balling to help the search
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[steve244]

Runs good now. Check the video.

TII is new and bench tested within specs using the freezer, fridge and hot water and ratwell's tables.

I went through two TIIs before getting one that worked.

Every gasket and seal is new. All new vacuum hoses and runner connectors. New intake elbow. Rebuilt TB and new gasket. Been collecting parts for two years. The only thing old is the alternator (but I did replace the voltage regulator/brushes) besides the AFM and controller. Injectors are all new, the ones that injector rehab sells with rails.

I also ordered a rebuilt AFM today, but I'm pretty sure I could drive it using the old one after tweaking it. It appeared to have been messed with before I got to it.

But seriously, thanks for all the suggestions.
_________________
82 AC vanagon approx 200K miles (3K are mine).
DD is a 2015 Leaf
Road Trip to Hell (FL 2023)
The Vanagon's drivetrain and chassis restomod thread. Best sung to the tune of I Did It My Way...

[Xevin]

_________________
Keep on Busin'

[steve244]

That hurts.
_________________
82 AC vanagon approx 200K miles (3K are mine).
DD is a 2015 Leaf
Road Trip to Hell (FL 2023)
The Vanagon's drivetrain and chassis restomod thread. Best sung to the tune of I Did It My Way...

[Xevin]

Have you run this engine for 20 minutes at 2000k rpm yet?
_________________
Keep on Busin'

[steve244]

Nope. Show me a reference for that and I'll read it.

Running at 2000 to splash lube the cam in an American OHV V8 is a thing. Since our cam and hydraulic lifters bathe in oil it's not needed. Just seating the rings and normal operation for 400 miles.

I will be putting wheels on the road and running it under load to seat the rings.

Here's a vid of it running just now.


Link

_________________
82 AC vanagon approx 200K miles (3K are mine).
DD is a 2015 Leaf
Road Trip to Hell (FL 2023)
The Vanagon's drivetrain and chassis restomod thread. Best sung to the tune of I Did It My Way...

[Xevin]

I pulled that out of my ass to make your life miserable. I thought you were working with a small block Chevy. WTF?
Buy a book FFS. Or listen to someone other then yourself. The kids like to text GFY.

_________________
Keep on Busin'