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Thoughts on a coughing motor

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Ollie Yeah Buddy

840 posts · joined Oct 2009 ·

#1006382
Hey guys,

I'm running twin 48IDF's on a 2276, and I'm noticing there is a splutter through the revs, particularly under medium load acceleration. It makes putting around a big of a chore, and was wondering if anyone had any ideas. If I mash the Go-Pedal from a standing start, it seems to miss the cough.

I'm thinking it could be something to do with the Carbys, or would an exhaust leak also maybe be something to look for?

Cheers in advance!

Ollie
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- '70 1500 Beetle (The Clean One)
- '76 1300 Beetle (The In-between One)
- '69 1500 Beetle (The Mean One)

Bizarre Moderator The artist formerly known as blue74l

12,789 posts · joined Aug 2002 ·

#1006385
I would try a blocked idle jet first

Pull a lead one at a time at idle and see if one makes no difference
Futue te ipsum!!!

ragged Just ask if you need HELP!

478 posts · joined Jan 2005 ·

#1006388
Does this happen around 2,000 to 2,500 rpm? Dave

Ollie Yeah Buddy

840 posts · joined Oct 2009 ·

#1006396
ragged wrote:Does this happen around 2,000 to 2,500 rpm? Dave
Hey Dave,

Yeah that sounds pretty much right! I'm suspecting perhaps the change to the main jet may be problematic?
Follow the Photo Fun:
http://forums.aussieveedubbers.com/viewtopic.php?tid=95238

- '70 1500 Beetle (The Clean One)
- '76 1300 Beetle (The In-between One)
- '69 1500 Beetle (The Mean One)

vassy66T1 Wow ... are U reading this?

2,120 posts · joined Jun 2003 ·

#1006404
Make sure your linkages are well synchronised.

ragged Just ask if you need HELP!

478 posts · joined Jan 2005 ·

#1006410
Hi Ollie,
Yes, it is the entire main jet circuit that needs tuning. That includes main, air correction and emulsion tube.
Do you know what size jets and emulsion tubes you have at the moment? What size venturis and idle jets too?
Dave

Bizarre Moderator The artist formerly known as blue74l

12,789 posts · joined Aug 2002 ·

#1006415
Ollie

Is this something that has developed lately or something that was always there?
Futue te ipsum!!!

Ollie Yeah Buddy

840 posts · joined Oct 2009 ·

#1006548
Sorry for the slow replies!

As long as I've had the carbys it's been there..I don't drive it too much but it's gotten worse of late. I've also worked out if I'm at lower revs in say fourth or third, and just sit at the trouble spot, it will kind of cough and lose some power slightly and I have to give it more gas.

Does this help?

Carby rebuild on the cards?
Follow the Photo Fun:
http://forums.aussieveedubbers.com/viewtopic.php?tid=95238

- '70 1500 Beetle (The Clean One)
- '76 1300 Beetle (The In-between One)
- '69 1500 Beetle (The Mean One)

barls Administrator Causer of Chaos and Mayhem

9,473 posts · joined Jun 2004 ·

#1006550
give matt berry a call and chat to him. he sorted mine real easy
“We all pay for life with death, so everything in between should be free.” Bill Hicks
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