| [ Total Views: 1128 | Total Replies: 19 | Thread Id: 73191 ] |
|
|
 Jeza
Officially Full-On Dubber
Posts: 353
Threads: 23
Registered: January 9th, 2003
Member Is Offline
Location: Wellington, New Zealand
Theme: UltimaBB Pro Blue ( Default )
Mood: Spinning
|
| posted on November 29th, 2008 at 01:49 PM |
|
|
Dellorto idle problem
Hi all
I've got an idle problem that is driving me up the wall.
I've finally narrowed it down to the Dellorto carb.
I have blown the jets out and lifted the top off this carb so many times now I can count the number of turns to remove the top screws!!
However I must be missing something as each time I put it back on the car and start it up - same old problem!
I know for sure that it isn't a manifold leak (or spark) as I've borrowed a friends carb and tested that and we idle beautifully. I was also
running it for 6 months previously with no troubles.
The details
Always number 1 cylinder that is not idleing.
1700 type 4
Twin Dellorto 36's
Vent 32
idle 52
main jet 135
airs 180
pump 33
emulsion 9164.2
Any suggestions on something thats often missed when cleaning these carbs??
Thanks
Jeremy
......random gibberish for today.......
|
|
|
 Bizarre
Super Moderator
The artist formerly known as blue74l
Posts: 12780
Threads: 734
Registered: August 25th, 2002
Member Is Offline
Location: Abbotsford, Sydney
Theme: UltimaBB Pro Blue ( Default )
|
| posted on November 30th, 2008 at 08:14 AM |
|
|
Has to be something inside?
Need to get a compressed air can and blow it out.
I guess you need to blow the chunk out - not further in
Futue te ipsum!!!
|
|
|
Jeza
Officially Full-On Dubber
Posts: 353
Threads: 23
Registered: January 9th, 2003
Member Is Offline
Location: Wellington, New Zealand
Theme: UltimaBB Pro Blue ( Default )
Mood: Spinning
|
| posted on November 30th, 2008 at 08:25 AM |
|
|
Thanks Bizzare
I'm coming to the conclusion it probably is a chunk of something stuck somewhere inside I can't see - and isn't dissolved by carb cleaner...
So I might visit a friend with a compressor and get some decent volume of compressed air into the sucker.
Cheers
Jeremy
......random gibberish for today.......
|
|
|
hellbugged
A.k.a.: Daimo Pell
23 Windows of Awesome
48's and straight cuts
Posts: 5080
Threads: 116
Registered: April 17th, 2003
Member Is Offline
Location: Nambucca Valley NSW
Theme: UltimaBB Psyche Blue
Mood: Couldn't care less
|
| posted on November 30th, 2008 at 08:29 AM |
|
|
yeah blow opposite the direction of flow........did you pull the plug at the bottom of the fuel bowl and clean with the jets and mixture screws
removed?
take the large plug off the side of the carb and clean the progression holes too.
|
|
|
Jeza
Officially Full-On Dubber
Posts: 353
Threads: 23
Registered: January 9th, 2003
Member Is Offline
Location: Wellington, New Zealand
Theme: UltimaBB Pro Blue ( Default )
Mood: Spinning
|
| posted on November 30th, 2008 at 09:01 AM |
|
|
Hi
Yes, I pulled all the brass jets and plugs and squirted compressed air from a can through them all. When this made no difference I tried carb
cleaner.
The carb cleaner seemed to come out the appropriate hole when it was squirted into one, but I've probably been squirting it further in - not out!
Will try again.
Thanks
Jeremy
......random gibberish for today.......
|
|
|
hellbugged
A.k.a.: Daimo Pell
23 Windows of Awesome
48's and straight cuts
Posts: 5080
Threads: 116
Registered: April 17th, 2003
Member Is Offline
Location: Nambucca Valley NSW
Theme: UltimaBB Psyche Blue
Mood: Couldn't care less
|
| posted on November 30th, 2008 at 09:12 AM |
|
|
yes, they are very small gallery's...........might be time to look for something else if you believe you have them cleaned thoroghly.........can take
a copuple of goes but
personally i would pull the WHOLE carb off the car AND apart to be sure
plenty of pics on where to go in my members ride thread........but sounds like you already know.
the dellorto tech book has great tips!
|
|
|
cb john
Wolfsburg Wizard
Posts: 470
Threads: 6
Registered: June 22nd, 2007
Member Is Offline
Location: Sydney
Theme: UltimaBB Pro Blue
|
| posted on November 30th, 2008 at 09:47 AM |
|
|
If nothing you've done helps, strip the carby bare and use ultrasonic cleaner.If there is some blockage or obstruction in the galleries, that will
shake it out.
|
|
|
Jeza
Officially Full-On Dubber
Posts: 353
Threads: 23
Registered: January 9th, 2003
Member Is Offline
Location: Wellington, New Zealand
Theme: UltimaBB Pro Blue ( Default )
Mood: Spinning
|
| posted on November 30th, 2008 at 11:07 AM |
|
|
Thanks guys
For the moment I have fitted my carb top and all my jets / venturies etc to my friends carb - and it idles perfectly.
So there must be a partial blockage or something in one of the galleries in the main body of the carb somewhere.
Cheers
Jeremy
......random gibberish for today.......
|
|
|
 vw54
Super Administrator
Always Waiting 4 Friday
Posts: 16723
Threads: 378
Registered: August 26th, 2002
Member Is Offline
Location: Sunny Sydney
Theme: UltimaBB Pro Blue ( Default )
Mood: Oval resto ongoing
|
| posted on November 30th, 2008 at 03:02 PM |
|
|
get a wire bruch and use it to check all the jets to see if there blocked it will be the air idle jet
|
|
|
Jeza
Officially Full-On Dubber
Posts: 353
Threads: 23
Registered: January 9th, 2003
Member Is Offline
Location: Wellington, New Zealand
Theme: UltimaBB Pro Blue ( Default )
Mood: Spinning
|
| posted on November 30th, 2008 at 04:30 PM |
|
|
Hi Dave
The Jets are all okay as they are now in my mates carb that is on the car idleing beautifully.
Question to all - Are the O-rings on the mixture screws as shown in Hellbugged's thread (image below, from Hellbugged's thread)
supposed to be round as in the traditional O-ring or something special, ie flat sides as shown?
Thanks
Jeremy
......random gibberish for today.......
|
|
|
vw54
Super Administrator
Always Waiting 4 Friday
Posts: 16723
Threads: 378
Registered: August 26th, 2002
Member Is Offline
Location: Sunny Sydney
Theme: UltimaBB Pro Blue ( Default )
Mood: Oval resto ongoing
|
| posted on November 30th, 2008 at 05:43 PM |
|
|
i carnt remember the dells completely but if they have an O ring and is cut yes then u will have troble as it will by pass and suck EXTRA air
and cause eratic idle
|
|
|
hellbugged
A.k.a.: Daimo Pell
23 Windows of Awesome
48's and straight cuts
Posts: 5080
Threads: 116
Registered: April 17th, 2003
Member Is Offline
Location: Nambucca Valley NSW
Theme: UltimaBB Psyche Blue
Mood: Couldn't care less
|
| posted on November 30th, 2008 at 05:53 PM |
|
|
i replaced them with round ones from a kit, the are fine either way..........as Dave above has said, they should be in good order to work properly
tho
when you turn the mixture screws in (one at a time) completely closed, then out......does the nmotor change song? this is a good way to see if you do
have a blocked jet/circuit and which one
|
|
|
Jeza
Officially Full-On Dubber
Posts: 353
Threads: 23
Registered: January 9th, 2003
Member Is Offline
Location: Wellington, New Zealand
Theme: UltimaBB Pro Blue ( Default )
Mood: Spinning
|
| posted on November 30th, 2008 at 06:27 PM |
|
|
Hi Hellbugged
There was no change in the engine noise when screwed in completely or out for number one. All others worked as they should.
I used the "remove the lead from the dissy" to isolate which cylinder wasn't working, but also tried screwing in and out the mixture screws on each
barrell to see if that made any difference.
The offending carb is now sitting on my bench completely stripped - would be nice to sort so I can return my mates one!
Thanks for the help guys - the knowledge and help here is fantastic...
And that build of yours Hellbugged is awe-inspiring! (and I havn't gotten past the carb cleanup!).
Cheers
Jeremy
......random gibberish for today.......
|
|
|
LIFE IN THE LOW LANE
A.k.a.: Brennden Alder
Son of Jim - Creator of Good
All people have the right to stupidity but some abuse the privilege
Posts: 2534
Threads: 53
Registered: March 11th, 2007
Member Is Offline
Location: Murrumba Downs - Brisbane
Theme: UltimaBB Pro Orange
Mood: What Kombi wants vs what Kombi gets are nowhere near the same...
|
| posted on December 2nd, 2008 at 08:01 PM |
|
|
I replaced all the o rings on my mixture screws before Warwick as they were gonsky. normal O rings the right size did the trick as Daimo said.
I stripped my carbs before Warwick and cleaned everything. I even polished a few things too!! Like venturi's and cleaned all the brass jets up till
they gleamed!!
[size=4] ACCEPT THAT SOME DAYS YOU ARE THE PIDGEON AND SOME DAYS YOU ARE THE STATUE[/size]
Alder Outlaws VW Racing - check it out on fb!!
|
|
|
hellbugged
A.k.a.: Daimo Pell
23 Windows of Awesome
48's and straight cuts
Posts: 5080
Threads: 116
Registered: April 17th, 2003
Member Is Offline
Location: Nambucca Valley NSW
Theme: UltimaBB Psyche Blue
Mood: Couldn't care less
|
| posted on December 2nd, 2008 at 10:07 PM |
|
|
| Quote: | Originally
posted by Jeza
Hi Hellbugged
There was no change in the engine noise when screwed in completely or out for number one. All others worked as they should.
Cheers
Jeremy
|
so that's good news cause you know where you're looking for the blockage..........clean up the mixture screw tips with some emery cloth whilst they
are out
up-date us with the out come, good or bad please
|
|
|
occy8
Learner Dubber
Posts: 6
Threads: 3
Registered: December 14th, 2008
Member Is Offline
Theme: UltimaBB Pro Blue ( Default )
|
| posted on December 15th, 2008 at 06:53 PM |
|
|
So jezza what was the outcome , im interested as i have the same problem.
Cheers
|
|
|
Jeza
Officially Full-On Dubber
Posts: 353
Threads: 23
Registered: January 9th, 2003
Member Is Offline
Location: Wellington, New Zealand
Theme: UltimaBB Pro Blue ( Default )
Mood: Spinning
|
| posted on January 15th, 2009 at 06:17 PM |
|
|
Hi all
Sorry to take so long to respond, I've only just sorted the car out.
To be honest I sorted out the problem in the end by tracking down another set of 36 dells off an Alfa freind, and swapped everything to the "new"
body and fitting that and the problem went away.
I was under time pressure so I wasn't keen to fluff around any longer than I already had. Unfortunately the car was sold and I needed to clear it
from my garage for the builders (leaky house syndrome - very common problem with early 2000 monolithic clad houses in NZ).
So I'm now VW'less...
... for the moment.
Thanks to all for the help.
Cheers
Jeremy
PS said Alfa freind mentioned that it could well be an air leak around the throttle spindle. He suggested spraying starter spray at the spindle on
the offending side to see if the engine idled better - a little hard to test on No.1 cylinder in a VW!
......random gibberish for today.......
|
|
|
greedy53
Bishop of Volkswagenism
Posts: 3062
Threads: 468
Registered: March 4th, 2006
Member Is Offline
Location: camden nsw 2570
Theme: UltimaBB Pro Grey
Mood: strung out
|
| posted on January 16th, 2009 at 03:21 PM |
|
|
have you replaced all the plugs and try differant spark leads other than that put a new dizzy cap on they do crack and its hard to see
i wait until dark than start it or get someone to start it
and you watch for any wayward spark i did this when i just could not fix in the dark it stood out like a beacon
|
|
|
Jeza
Officially Full-On Dubber
Posts: 353
Threads: 23
Registered: January 9th, 2003
Member Is Offline
Location: Wellington, New Zealand
Theme: UltimaBB Pro Blue ( Default )
Mood: Spinning
|
| posted on January 16th, 2009 at 06:28 PM |
|
|
| Quote: | Originally
posted by greedy53
have you replaced all the plugs and try differant spark leads other than that put a new dizzy cap on they do crack and its hard to see
i wait until dark than start it or get someone to start it
and you watch for any wayward spark i did this when i just could not fix in the dark it stood out like a beacon
|
Yep - did all of that several times over before I stripped the carb down.
It is a good trick though - looking for wayward sparks at night!
......random gibberish for today.......
|
|
|
ctefeh
Wolfsburg Wizard
Posts: 479
Threads: 30
Registered: April 23rd, 2005
Member Is Offline
Location: SiddaKnee nowadayz
Theme: UltimaBB Pro Blue ( Default )
Mood: grimly determined
|
| posted on January 16th, 2009 at 08:39 PM |
|
|
Jeza,
"Dellorto Drip" could have been the problem?. It's been discussed on TheSamba a few times. You can do an off-the-car test for it.
HTH
Ctefeh
|
|
|
