| [ Total Views: 477 | Total Replies: 3 | Thread Id: 22622 ] |
|
|
 Swampy
Learner Dubber
Posts: 14
Threads: 5
Registered: February 12th, 2004
Member Is Offline
Theme: UltimaBB Pro Blue ( Default )
|
| posted on May 8th, 2004 at 07:20 PM |
|
|
Back fire through carbies
Anybody know why my 2 ltr dual carb kombi might do this?
Oh, any only just about run on what feels likr two cyclinders if i pump thottle like crazy.
I've just checked compression, 125 all round and have 4 sparks.
cheers
swampy
|
|
|
*did*
A.k.a.: Steve
Posts: -16
Threads: 0
Registered: September 10th, 2003
Member Is Offline
Location: Melbourne
Theme: UltimaBB Pro Blue ( Default )
Mood: happy 
|
| posted on May 8th, 2004 at 09:59 PM |
|
|
Maybe you might have the carbs incorrectly tuned and/or a tight valve or two.
Does it happen only when the engine is warm or only when it's cold?
Does it also backfire out the exhaust?
If you pump the throttle like crazy then it will tend to lose cylinders, because they are flooded and dont have enough air to fire. |
|
|
*did*
A.k.a.: Steve
Posts: -16
Threads: 0
Registered: September 10th, 2003
Member Is Offline
Location: Melbourne
Theme: UltimaBB Pro Blue ( Default )
Mood: happy
|
| posted on May 8th, 2004 at 10:01 PM |
|
|
Oh sorry, just saw you checked the compression, probably not the valves then.
Check the timing, might be too advanced |
|
|
Swampy
Learner Dubber
Posts: 14
Threads: 5
Registered: February 12th, 2004
Member Is Offline
Theme: UltimaBB Pro Blue ( Default )
|
| posted on May 9th, 2004 at 12:58 AM |
|
|
timings good, is 30 btdc at 3000 on a 009
hot or cold:cry
|
|
|
*did*
A.k.a.: Steve
Posts: -16
Threads: 0
Registered: September 10th, 2003
Member Is Offline
Location: Melbourne
Theme: UltimaBB Pro Blue ( Default )
Mood: happy
|
| posted on May 9th, 2004 at 01:38 AM |
|
|
hmm, are you sure that is the correct timing setting?
hopefully someone with knowledge on buses can shed some light in the morning. |
|
|
 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 May 9th, 2004 at 10:17 AM |
|
|
a backfire through the carb is a sign of leanness
99% says you have a blocked idle jet of circuit
Seeing as thet are dual single barrels that will make it run on 2 cylinders
Futue te ipsum!!!
|
|
|
