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Author Topic: Stuttering carb  (Read 1447 times)
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hf_dave
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« on: July 04, 2016, 09:11:09 PM »

My Beta 2000 that i have just finished restoring has a stutter when i am driving . it happens between 2000 revs and 3000 revs when accelerating on the road . I put carb cleaner in the fuel and my mechanic checked the jets ect . he  reckons on a carb re-build . Can someone recommend  a firm to re-build the carb . thanks David .
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aldad138
Alexander M K Kasner
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1979 Beta Coupe


« Reply #1 on: July 06, 2016, 02:34:43 AM »

What carb is it?  I have a 32 DATR rebuilt and in excellent shape I just installed and I had sputtering.  I read through some threads and took the advice to close off the fuel return on the carb (I have a electric fuel pump and inline fuel pressure regulator).  The sputter is gone.  She is driving better than ever.  Worth considering fuel and other causes, not just the carb itself.  There are many good threads about issues like yours.

Good luck!  Alex
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1979 Lancia Beta Coupe
1994 Nissan Hardbody
2014 Mazda 3
Old Cars
1977 Alfa Romeo Alfetta
1990 Subaru Legacy
1979 Fiat Strada
1998 Volvo V70 GLT
Neil-yaj396
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1979 1300 Coupe


« Reply #2 on: July 06, 2016, 06:18:48 AM »

My Beta 2000 that i have just finished restoring has a stutter when i am driving . it happens between 2000 revs and 3000 revs when accelerating on the road . I put carb cleaner in the fuel and my mechanic checked the jets ect . he  reckons on a carb re-build . Can someone recommend  a firm to re-build the carb . thanks David .

This is an almost endemic problem with carburettor cars now and I always point people to this thread;

http://www.betaboyz.myzen.co.uk/forum/index.php?topic=649.0

There is also a theory that we all need bigger primary running jets to accommodate thinner modern petrol?
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mwredit
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« Reply #3 on: July 07, 2016, 04:25:47 PM »

Alex:  Did you compare the jets between the two carburetors?  That may be the answer.  If it wasnt stuttering before, I'd swap the jets if you still have the old carb and try it.
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Mike R.

1968 Mercury Cougar XR7
1961 MG Midget
1974 Ford Mustang II Ghia
1977 Lancia Beta HPE
aldad138
Alexander M K Kasner
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1979 Beta Coupe


« Reply #4 on: July 09, 2016, 01:49:20 AM »

I have not, but you are not the first person to suggest that.  The other jets are larger...I am going to work on that this weekend, among other things.

Alex
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1979 Lancia Beta Coupe
1994 Nissan Hardbody
2014 Mazda 3
Old Cars
1977 Alfa Romeo Alfetta
1990 Subaru Legacy
1979 Fiat Strada
1998 Volvo V70 GLT
mwredit
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« Reply #5 on: July 09, 2016, 04:00:08 AM »

Alex: If you try the old jets, air bleeds and emustion tubes, I'd clean the heck out of them with really good carb cleaner.  I couldnt believe the amount of junk that came out of mine.  It was so bad, I had the carb apart twice.  The car was stored for over 20 plus years so the buildup in the fuel system was tricky to deal with.  Since we're dealing with Deathanol (Ethanol), that complicates things.  Typically, you need to go up a couple of jet sizes, like I had to on my '68 Cougar when I installed a 2bbl Holley 2300 on it.  In the past when it was on a previous car, it ran with #53 jets, with a 302.  Now, it needs #57 jets due to the deathanol they're adding to the fuel.  I know I may need to tune the HPE accordingly in the near future, but for now it runs good with the current setup. This car passed smog last year with a funky dirty carburetor that was flooding and in a bad need of a rebuild, along with a plugged return line.  Hopefully, it will pass when I smog it next.  Good luck to you.
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Mike R.

1968 Mercury Cougar XR7
1961 MG Midget
1974 Ford Mustang II Ghia
1977 Lancia Beta HPE
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