I need Carb help

CwbyEngineer · 08-10-2008, 10:38 PM

I have an 81 k2500 3/4 ton with a 350, wide ratio 4 spd, 4wd, no air. It hasn't been used in about 5 yrs, new to me. The gas was obviously bad so I sucked the old gas out of the tank, changed from dual tanks to one, new fuel pump and attempted to rebuild the Qjet. There I'm stuck. The power valve won't go in dep enough to clear the gasket. There is a screw (jet?) with spring driectly ahead of the power valve that doesn't show on any parts diagram I've seen. Does the metal pin on the front of the power valve go under the shoulder of this screw? is there any correlation between the pin on the powervalve and this screw? Should I just replace the Qjet with a Holley or other carb? There are no "Carb" specialists in this part of the country that I know of. Not within 60 or 150 miles anyway. Truck has app.118K and will only be used as a ranch fire truck. Any ideas about low tork manifold and carb combo would be appreciated if I can't get the Q jet to work.

heavychevy85 · 08-11-2008, 06:44 AM

this should help you i found it yesterday when i was lookin for stuff and thaught i just might need it one of these daysso i saved it to my favorites so yeah here ya go have fun with it

QuadraJet

CwbyEngineer · 08-11-2008, 09:30 AM

Thanks Heavychev! That has much better pics than either book or the distruction sheet with the rebuild kit! Whish I'd had it before I changed the power piston limiter screw. Still not sure if power piston goes in before of after gasket but ddn't take time to read far enough. I'm sure it will help. On the other hand, I had me wife talked into an new manifold and carb so I could get the truck out of her way.
I'll try again on the rebuild before I order speed parts.

heavychevy85 · 08-11-2008, 02:44 PM

hey no problem anytime

Fatcat · 08-15-2008, 07:31 PM

get efi that will solve all ur problems

08-10-2008, 10:38 PM	#1
CwbyEngineer Junior Member Join Date: Jul 2008 Location: Western Nebraska Posts: 4	I need Carb help I have an 81 k2500 3/4 ton with a 350, wide ratio 4 spd, 4wd, no air. It hasn't been used in about 5 yrs, new to me. The gas was obviously bad so I sucked the old gas out of the tank, changed from dual tanks to one, new fuel pump and attempted to rebuild the Qjet. There I'm stuck. The power valve won't go in dep enough to clear the gasket. There is a screw (jet?) with spring driectly ahead of the power valve that doesn't show on any parts diagram I've seen. Does the metal pin on the front of the power valve go under the shoulder of this screw? is there any correlation between the pin on the powervalve and this screw? Should I just replace the Qjet with a Holley or other carb? There are no "Carb" specialists in this part of the country that I know of. Not within 60 or 150 miles anyway. Truck has app.118K and will only be used as a ranch fire truck. Any ideas about low tork manifold and carb combo would be appreciated if I can't get the Q jet to work.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
for sale weber 32/36 carb. for toyota 22r/ rebuilt stock toyota carb	montanatoy	Toyota Truck Forum	1	08-24-2008 03:46 PM
carb to TBI	david 87	Chevy Truck Forum	18	08-12-2008 04:39 PM
carb id?	724x4	Chevy Truck Forum	3	04-05-2008 09:39 AM
Help with a Carb.	{BigDave}	GMC Truck Forum	7	03-08-2008 10:28 AM
Carb ?	Nick_F150	Ford Truck Forum	3	02-01-2006 09:02 AM

08-11-2008, 06:44 AM	#2
heavychevy85 Senior Member Join Date: May 2008 Location: Muncy, PA Posts: 244	this should help you i found it yesterday when i was lookin for stuff and thaught i just might need it one of these daysso i saved it to my favorites so yeah here ya go have fun with it QuadraJet

08-11-2008, 09:30 AM	#3
CwbyEngineer Junior Member Join Date: Jul 2008 Location: Western Nebraska Posts: 4	Thanks Heavychev! That has much better pics than either book or the distruction sheet with the rebuild kit! Whish I'd had it before I changed the power piston limiter screw. Still not sure if power piston goes in before of after gasket but ddn't take time to read far enough. I'm sure it will help. On the other hand, I had me wife talked into an new manifold and carb so I could get the truck out of her way. I'll try again on the rebuild before I order speed parts.

08-11-2008, 02:44 PM	#4
heavychevy85 Senior Member Join Date: May 2008 Location: Muncy, PA Posts: 244	hey no problem anytime

08-15-2008, 07:31 PM	#5
Fatcat Senior Member Join Date: Jun 2008 Location: NY Posts: 83	get efi that will solve all ur problems