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Flatspot and hesitation

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karmannghia60 Karmann Ghia Sucker

1,459 posts · joined Aug 2002 ·

#119525
This is a 1300 SP engine with a 28PICT carby. Timing & dwell seem to be spot on. If I try full throttle off the mark, it will hesitate badly but if I accelerate slower, it would be fine although slow then you can feel it pick up. On steep grades its pretty bad because you have to open the throttle, you have no choice. Idles OK. Leads stuffed? Carby stuffed? Or what?
Raf

MickH Hairy Gutted Sloth

3,389 posts · joined Sep 2003 ·

#119531
dizzy advance working ok??
tssnq.com.au

karmannghia60 Karmann Ghia Sucker

1,459 posts · joined Aug 2002 ·

#119538
It seem to be working. I disconnected the carby end and sucked, the timing marking moved up the pulley. I have a 009, should I just wack it in?
By the way, the pulley has one mark one it. This is TDC right? I took a guess that timing should be about 7.5BTDC and that's what I used (estimated what 7.5BTDC is from another pulley)

Bizarre Moderator The artist formerly known as blue74l

12,789 posts · joined Aug 2002 ·

#119541
IF it has "one" mark that is usually 7.5 before

You will be out if you have used it as TDC

Just line the mark up with the case seam
Futue te ipsum!!!

karmannghia60 Karmann Ghia Sucker

1,459 posts · joined Aug 2002 ·

#119544
OK, I will do that and see how it goes
Thanks

oval TOFU Bitte, ein Bit!

2,946 posts · joined Jul 2003 ·

#119657
maybe its icing of the manifold under the carby... the heating pipe may be blocked and not heating properly...
...and Robert's ya father's brother...

KruizinKombi Seriously Obsessed Cyber Dubber

3,493 posts · joined Aug 2002 ·

#119666
Check down the throat of the carby to see if your accelerator jet has fallen out... :o
Kruizin Kol

karmannghia60 Karmann Ghia Sucker

1,459 posts · joined Aug 2002 ·

#120719
Still no joy. I did the following so far:
- replaced the leads
- replaced the points
- replaced condenser
- tried vacuum advance dizzy and a 009
- replaced carby (with another dodgy one)
- timing is spot on and its not 180deg out
The spacer under the carby (the one I had to make to clear the generator) is sealed well
Another symptom, if I fully open the throttle, apart from the coughing, I will get a loud pop from the carby
Any words of wisdom?
Raf

robnjo Veteran Volks Folk

2,082 posts · joined Sep 2003 ·

#120774
Any words of wisdom?
yeah..."shit it sounds bad" LOL

lowrider Officially Full-On Dubber

329 posts · joined Sep 2002 ·

#120790
Raf,
have you got another carb lying around that you can stick on it for comparison?
seems like you've eliminated everything else!

Bizarre Moderator The artist formerly known as blue74l

12,789 posts · joined Aug 2002 ·

#120796
Take the filter off and rev it full throttle.
Does the loud pop come from the exhaust or out the top og the carb??

Sounds like a big vacuum leak somwhere.

Does ir run better when the choke is closed???
Futue te ipsum!!!

karmannghia60 Karmann Ghia Sucker

1,459 posts · joined Aug 2002 ·

#120839
I tried two 28PICT carbies but both are not in great shape anyway. Anyone hasa 28 or a 30 I can try?
The pop is from the carby not the exhaust. It was runnong OK before I decided to full everything apart to fix an oil leak. I took the carby, manifold, dizzy, generator and fan out. The leak was from the oil cooler. Becuase I took a lot of things out, I got no idea what caused the problem. Maybe I need to reseat the manifold. Any way I can test manifold to head leaks?
Raf

lugnuts Custom Title Time!

1,070 posts · joined Aug 2002 ·

#120857
Did u use 2 new intake manifold sealing rings,they go between the head and manifold.🙁

Grey 57 Old Grey Cruiser

2,937 posts · joined Aug 2002 ·

#120865
Raf is the carbie the early manual choke type? And is the dissy the large body vac advance only type?
If yes to both then the combination is no good. The carb will pull full vac advance all the time due to the vacuum take off point on the early 28's. You need to find an early mechanical & vac advance distributor to go with that carb. Or a later model vac advance only carby.

Other than that it could be manifold icing. VW Performance Center in Croydon do a nice manifold heater set up that pretty cheap and easy to fit.
D

himmell Seriously Crusin Dubber

115 posts · joined May 2003 ·

#120867
Raf,

Have you tried that manifold i gave you?, the pre heater pipes were unblocked and you wouldnt need that adaptor plate of yours that i think is half your problem. Also, if you tried that 28 pic carb i gave you without putting a kit through it im suprised it even idles. Your gonna have to spend some money at some stage mate.
good luck

chris
mirp mirp went the hair lipped dog

karmannghia60 Karmann Ghia Sucker

1,459 posts · joined Aug 2002 ·

#120926
Thanks Chris, both did not fit. I don't mind spending the money but what am I supposed to buy? I don't even know where the problem is.

bigbruvabob Officially Full-On Dubber

216 posts · joined Jul 2003 ·

#120968
ok been closely following this thread as i have the very same problem in my bug. check your seal between your air cleaner and carby well (in fact any seal). after readng this thread i went and checked all my seals for a third time and i found that if i exerted a bit more than normal force on the air cleaner it wobbled. It took more than just a light shake to make it move but it did move. I therefore tightened really tight and that did the trick. Moral even if you think its sealing it may not be. Also your carby may have a blockage. 250ml of wynns spit fire poured straight down the carby will clear most gunk, however this will smoke like a biartch and is not recomended for new engines. i was really suprised after i tightened the air cleaner that that did the trick as it must have been just the smallest air leak cos i swear at first inspection this diid not appear loose but after taking only that action i have no problems

bigbruvabob Officially Full-On Dubber

216 posts · joined Jul 2003 ·

#120972
i ave a 28 pict and vacuum advance dizzy that i no longer need . both were working fine on the motor i took them off, and i would happily swap for youur 009 as i need one for the new donk im building or if you just want to use to sort shit out no probs. we are in northcote

karmannghia60 Karmann Ghia Sucker

1,459 posts · joined Aug 2002 ·

#121041
I took everything of today (with the engine in) Replaced the rings under the manifold and re-sealed everything. Nope still the same shit.

himmell Seriously Crusin Dubber

115 posts · joined May 2003 ·

#121043
Raf

I think u can get adaptor plates for the manifold to whack on the 34pic u got, ive seen them somewhere? volks performance centre perhaps? The 28 pic carb rebuild kits are easy enuf to come by also as well. Hope u get it sorted soon.
chris
mirp mirp went the hair lipped dog

karmannghia60 Karmann Ghia Sucker

1,459 posts · joined Aug 2002 ·

#121096
Might have problems with that too. Bigger & higher carby won't clear the KG decklid low profile. What I need is the SP manifold which clears the 12V generator without having to use spacers. I know they exist because I had one before. I used the 28PICT with a 12V generator with no problems with the linkage

karmannghia60 Karmann Ghia Sucker

1,459 posts · joined Aug 2002 ·

#121123
Come to think of it, the only thing I haven't replaced is the coil, could it be the problem?

oval TOFU Bitte, ein Bit!

2,946 posts · joined Jul 2003 ·

#121349
Hey Dean, how did we fix my car - it had the same prob it sounds like.. just changed the carb yeh?

good luck Raf.....
...and Robert's ya father's brother...

karmannghia60 Karmann Ghia Sucker

1,459 posts · joined Aug 2002 ·

#121441
It was the damn coil. I replaced it last night and it idled well for about 10minutes. It was late so I didn't take it for a drive yet.
Raf

SKEWtYpe3 Custom Title Time!

1,859 posts · joined Aug 2002 ·

#121462
:thumb

lowrider Officially Full-On Dubber

329 posts · joined Sep 2002 ·

#121559
yahoo!

karmannghia60 Karmann Ghia Sucker

1,459 posts · joined Aug 2002 ·

#121863
Drove it to work today. Runs well finally