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ctc911ctc
'74, 2.0, 25K miles original biggrin.gif

Spring is here and that means I will return to working on the car instead of looking at this beauty in my garage!
The clutch is a bit bucky - may refer to this as chattering. New clutch and plate, HOWEVER, I did not mill the Flywheel - clutch and plate were original so I replaced them. I swear the flywheel looked perfect so I did not have it........... - yea I know, I know.......however, if anyone has other suggestions?

As to the bucking from the throttle - I rebuilt:

Throttle system
throttle position sensor
the vacuum plenum - it is tight!
All hoses
timing - right on
plugs
valve clearance
all injectors
near everything with the exception of the wiring harness.........

the bucking is when it is in a low power between coast and starting to accelerate

Runs great everywhere else on the power band.

Click to view attachment
Click to view attachment

mgphoto
Bucking at low rpm is usually a distributor problem, I had the same issue, I went to the 123 dizzy problem solved.
Lockwodo
If it's bucking on acceleration with the clutch fully engaged, it's probably the trigger points in the stock disty. Second the motion to install a 123 disty.
ctc911ctc
QUOTE(Lockwodo @ May 9 2023, 07:25 AM) *

If it's bucking on acceleration with the clutch fully engaged, it's probably the trigger points in the stock disty. Second the motion to install a 123 disty.



123 disty it is - however - what is a 123 disty - will ask the answer machine
r_towle
Clean and regrease advance plates in the distributor.
I would also remove and inspect the FI trigger points

Rich
mgphoto
QUOTE(ctc911ctc @ May 9 2023, 06:58 AM) *

QUOTE(Lockwodo @ May 9 2023, 07:25 AM) *

If it's bucking on acceleration with the clutch fully engaged, it's probably the trigger points in the stock disty. Second the motion to install a 123 disty.



123 disty it is - however - what is a 123 disty - will ask the answer machine



https://123ignitionusa.com/porsche-vw-bt-tu...h-programmable/
brant
QUOTE(r_towle @ May 9 2023, 09:00 AM) *

Clean and regrease advance plates in the distributor.
I would also remove and inspect the FI trigger points

Rich

agree.gif
ctc911ctc
QUOTE(r_towle @ May 9 2023, 09:00 AM) *

Clean and regrease advance plates in the distributor.
I would also remove and inspect the FI trigger points

Rich



Thank you Rich, will do this and report back !
StarBear
Any luck or progress? smile.gif
ctc911ctc
Oh gosh no!!!

I work at a snails pace........ All of the parts on the car are in great shape (except the rusted ones which I replaced........I will most likely take it off in the next few days and rebuild it.

Thank you,



QUOTE(StarBear @ May 11 2023, 08:09 AM) *

Any luck or progress? smile.gif

r_towle
I’m lazy and forgetful
Remove distributor cap
Take a well lighted picture of the orientation of the distributor.
Then pull it out, stick a rag in the hole gently

You can only put it in one way, you cannot seat it 180 degrees off.
But….getting the timing right is why I take a picture.

Btw, I’m lazy
Setting points perfectly is easier with the distributor in my bench vice smile.gif
ctc911ctc
Thank you Mr. Towle, the other guy from Taxachusetts


QUOTE(r_towle @ May 11 2023, 06:23 PM) *

I’m lazy and forgetful
Remove distributor cap
Take a well lighted picture of the orientation of the distributor.
Then pull it out, stick a rag in the hole gently

You can only put it in one way, you cannot seat it 180 degrees off.
But….getting the timing right is why I take a picture.

Btw, I’m lazy
Setting points perfectly is easier with the distributor in my bench vice smile.gif

r_towle
QUOTE(ctc911ctc @ May 11 2023, 08:51 PM) *

Thank you Mr. Towle, the other guy from Taxachusetts


QUOTE(r_towle @ May 11 2023, 06:23 PM) *

I’m lazy and forgetful
Remove distributor cap
Take a well lighted picture of the orientation of the distributor.
Then pull it out, stick a rag in the hole gently

You can only put it in one way, you cannot seat it 180 degrees off.
But….getting the timing right is why I take a picture.

Btw, I’m lazy
Setting points perfectly is easier with the distributor in my bench vice smile.gif


Happy to help if you need any parts, tools, etc
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