|
Author
|
Topic: annular discharge boosters dripping fuel at idle
|
popeye
Gearhead Posts: 252
From: Dixon, IA USA
Registered: Dec 2002
|
posted 04-30-2003 09:09 AM
   
I have A 750 cfm 4 barrel double pumper list # 9379 that drips fuel from the back boosters at idle and gets worse when the idle speed is increased. Adjusting the rear float seems to do nothing.The carb is an old race carb used on a 2200# street car with a 428 ci with a streetable solid cam but dont know the specs.I am going to rebuild the carb this week and would like some feedback as to what to look for.BTW its comes with a 8.5 pv according to the Holley illustrated parts & specs manual.thanks popeye ------------------
This is FORD COUNTRY, where on a quiet night, you can here a chevy rusting
IP: Logged |
Buster
Gearhead Posts: 1553
From: Hurricane alley
Registered: May 2002
|
posted 04-30-2003 09:59 AM
Blocked air bleed or if it has 4 corner idling system the rear setting could be to lean.
IP: Logged |
popeye
Gearhead Posts: 252
From: Dixon, IA USA
Registered: Dec 2002
|
posted 04-30-2003 10:35 PM
Buster,if what you discribed as the cause of the problem then a rebuild should do the trick.thanks popeye ------------------
This is FORD COUNTRY, where on a quiet night, you can here a chevy rusting
IP: Logged |
Buster
Gearhead Posts: 1553
From: Hurricane alley
Registered: May 2002
|
posted 05-01-2003 01:02 AM
Well, before I would go that far and rebuild the thing, I would use compressed air and blow out all 4 air bleeds and then adjust the idle circuits.What I like to do is remove the idle screws and then blow out the air bleeds... give the dirt somewhere to exit. Also blow some air in the idle circuits as well. Be careful not to put too much pressure in the circuits... be easy on the power valve.
IP: Logged |
Buster
Gearhead Posts: 1553
From: Hurricane alley
Registered: May 2002
|
posted 05-05-2003 04:53 PM
popeye, any luck?
IP: Logged |
popeye
Gearhead Posts: 252
From: Dixon, IA USA
Registered: Dec 2002
|
posted 05-07-2003 01:05 AM
Buster I got looking at this carb a little closer and decided to hold for now.The carb belongs to a friend of mine.He decided to buy a new holley 750 hp double pumper for his Cobra replica and is not sure what he's going to do with the old carb yet.Do you think the rear metering block would be a good replacement for a 750 dp with the drop leg boosters(Proform main body).It has the adjustable air/fuel mixture screws? ------------------
This is FORD COUNTRY, where on a quiet night, you can here a chevy rusting
IP: Logged |
gregaust
Journeyman Posts: 26
From: australia
Registered: Jul 2002
|
posted 05-11-2003 07:08 AM
If the carb is old,remove the rear needle and seat and check the the needle looks ok..Fit a new o'ring to the n+s since if it is old and has shrunk,fuel bypasses ,hence adjusting the n+s does nothing..Worth a try..
IP: Logged |
Mustangsandmore Forums
