The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 10-01-2018, 04:42 PM   #26
Myself
Registered User
 
Join Date: Oct 2005
Location: Northern Arkansas
Posts: 1,126
Re: Help...1972 350 W/HEI

Was the old module AND the new module doing this?? If not, then try another module.
Myself is offline   Reply With Quote
Old 10-02-2018, 11:18 AM   #27
Travisarmenta
Registered User
 
Travisarmenta's Avatar
 
Join Date: Oct 2015
Location: Woodbridge Va
Posts: 401
Re: Help...1972 350 W/HEI

Thanks for all the help fellas, especially the ones that said the ballast wire needs to be replaced, it was not.

Replaced the wire from the firewall to the Distributor and it Ran Great, all the way until it died due to carb getting too hot. only way it will start is WOT. So now onto a spacer to rectify that problem.

Any preference on spacers? for a factory Q-Jet, Factory intake.
Travisarmenta is offline   Reply With Quote
Old 10-02-2018, 11:39 AM   #28
BigRandy
Registered User
 
BigRandy's Avatar
 
Join Date: Jun 2017
Location: San Antonio, Texas
Posts: 156
Re: Help...1972 350 W/HEI

I only suggested you confirm the voltage to the dist since it's easy to overlook and I didn't see anything in your post indicating you had verified that - other than the swap was done by a reputable shop, but maybe I missed it.
__________________
Repairing and driving old trucks is an analog experience. No computers or sensors and they can be fixed with basic hand tools
BigRandy is offline   Reply With Quote
Old 10-02-2018, 01:05 PM   #29
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,495
Re: Help...1972 350 W/HEI

Quote:
Originally Posted by Travisarmenta View Post
Thanks for all the help fellas, especially the ones that said the ballast wire needs to be replaced, it was not.

Replaced the wire from the firewall to the Distributor and it Ran Great, all the way until it died due to carb getting too hot. only way it will start is WOT. So now onto a spacer to rectify that problem.

Any preference on spacers? for a factory Q-Jet, Factory intake.

Spacer won’t cure the flooding problem!
Find out why it’s flooding.
geezer#99 is offline   Reply With Quote
Old 10-02-2018, 01:48 PM   #30
Travisarmenta
Registered User
 
Travisarmenta's Avatar
 
Join Date: Oct 2015
Location: Woodbridge Va
Posts: 401
Re: Help...1972 350 W/HEI

Quote:
Originally Posted by geezer#99 View Post
Spacer won’t cure the flooding problem!
Find out why it’s flooding.
I can get up to 50 MPH now with no issues, but once I get to a stop light it dies and it wont start unless WOT, and even when it does start it runs like garbage.

I hit the throttle linkage on the carb and when it sprayed gas it just started smoking(out of carb) hence the spacer idea, i figured it was like that because of how hot it got.

So flooding is my main concern,

Am I wasting time and money with a spacer?
Travisarmenta is offline   Reply With Quote
Old 10-02-2018, 01:59 PM   #31
61K10
Registered User
 
61K10's Avatar
 
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,039
Re: Help...1972 350 W/HEI

you said new carb? where did it come from? New or rebuilt? Some QJet experts might give you some tips.
__________________
1961 chevy K10

my build is------------61K10 build
61K10 is offline   Reply With Quote
Old 10-02-2018, 02:03 PM   #32
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,495
Re: Help...1972 350 W/HEI

Needing to go wot to start it means it needs more air to mix with the excess fuel in the carb/intake.
The smoking isn’t from heat. It’s excess fuel vapour. Looks like smoke.
Any carb that floods does that.
Look in the carb while cranking it over or when you get it running. Any fuel seen at all means it’s flooding.
Could be dirt in the needle/seat or a sunk float.
geezer#99 is offline   Reply With Quote
Old 10-03-2018, 07:25 AM   #33
rpmerf
Registered User
 
rpmerf's Avatar
 
Join Date: Feb 2011
Location: Parkville, MD
Posts: 1,024
Re: Help...1972 350 W/HEI

Agreed, stock carb on a stock manifold shouldn't need a spacer to run right. It does sound like it is running rich.
__________________
1970 C20 Custom Camper - 350, TH350
1997 GMC Suburban
1994 Acura Integra GSR
1987 Dodge Daytona Shelby Z
rpmerf is offline   Reply With Quote
Old 10-03-2018, 08:30 AM   #34
Myself
Registered User
 
Join Date: Oct 2005
Location: Northern Arkansas
Posts: 1,126
Re: Help...1972 350 W/HEI

I had one get all crazy rich on me once and a dirt dobber had decided to plug the bowl vent!!
Myself is offline   Reply With Quote
Old 10-03-2018, 11:07 AM   #35
Travisarmenta
Registered User
 
Travisarmenta's Avatar
 
Join Date: Oct 2015
Location: Woodbridge Va
Posts: 401
Re: Help...1972 350 W/HEI

Quote:
Originally Posted by rpmerf View Post
Agreed, stock carb on a stock manifold shouldn't need a spacer to run right. It does sound like it is running rich.
It def is running rich, there is soot in my exhaust tips.

Quote:
Originally Posted by geezer#99 View Post
Needing to go wot to start it means it needs more air to mix with the excess fuel in the carb/intake.
The smoking isn’t from heat. It’s excess fuel vapour. Looks like smoke.
Any carb that floods does that.
Look in the carb while cranking it over or when you get it running. Any fuel seen at all means it’s flooding.
Could be dirt in the needle/seat or a sunk float.
Took the Q-jet apart last night, there def was some crap in there, cleaned it all up, since it was new I just decided to put it back together, transparently it needs more than just a blowout-it flooded again.

Rebuild kit on order.

Quote:
Originally Posted by 61K10 View Post
you said new carb? where did it come from? New or rebuilt? Some QJet experts might give you some tips.
Reman-dated 05/2018
Travisarmenta is offline   Reply With Quote
Old 10-03-2018, 11:25 AM   #36
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,495
Re: Help...1972 350 W/HEI

Did you put the needle/seat back togethor correctly. The clip installed wrong causes flooding.
http://www.crankshaftcoalition.com/w...4MV_carburetor
Like in here.
geezer#99 is offline   Reply With Quote
Old 10-03-2018, 11:41 AM   #37
Travisarmenta
Registered User
 
Travisarmenta's Avatar
 
Join Date: Oct 2015
Location: Woodbridge Va
Posts: 401
Re: Help...1972 350 W/HEI

Quote:
Originally Posted by geezer#99 View Post
Did you put the needle/seat back togethor correctly. The clip installed wrong causes flooding.
http://www.crankshaftcoalition.com/w...4MV_carburetor
Like in here.
Yes, but I broke the Float Bowl Insert(pictured on the right) and had to use another one(pictured on the left)

https://quadrajetparts.com/used-floa...319-p-398.html


BUT because the reman one has this in it:

https://quadrajetparts.com/carbureto...ket-p-438.html

I had to shave down the sides and but out the center of it just to make it work.

I have a 71 Q-Jet, and a 72 Q-jet that don't have the repair done. but they do need a GOOD cleaning, any benefit to rebuilding one of those? Since im doing it anyway. The float hinge is different on the repaired one, that is why i needed to shave it down.

I hate to think of wasting the 500 on the reman and just shelving it, but I just want it done right.

Thoughts?
Travisarmenta is offline   Reply With Quote
Old 10-03-2018, 12:06 PM   #38
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,495
Re: Help...1972 350 W/HEI

Gotta hate that cobbled togethor stuff.
I’d bite the bullet and rebuild one of the others with a much better kit from Cliff Ruggles.
geezer#99 is offline   Reply With Quote
Old 10-03-2018, 12:13 PM   #39
Travisarmenta
Registered User
 
Travisarmenta's Avatar
 
Join Date: Oct 2015
Location: Woodbridge Va
Posts: 401
Re: Help...1972 350 W/HEI

Quote:
Originally Posted by geezer#99 View Post
Gotta hate that cobbled togethor stuff.
I’d bite the bullet and rebuild one of the others with a much better kit from Cliff Ruggles.
I figured.

That's what I'll do. Thanks again for your input.
Travisarmenta is offline   Reply With Quote
Old 10-04-2018, 05:57 PM   #40
cadillac_al
Registered User
 
Join Date: Oct 2013
Location: Maine
Posts: 2,325
Re: Help...1972 350 W/HEI

It could just be a float adjustment. If there was trash in your new carb, I assume you cleaned the needle and seat good. Were the primary needles moving smoothly/ not jammed or stuck?. If the needle and seat looked clean and the primaries are working like they are supposed to then I would just lower the float and try it again.
__________________
76 Chevy K20
76 GMC K15
77 Chevy C10
77 Chevy K10
cadillac_al is offline   Reply With Quote
Old 10-15-2018, 11:17 AM   #41
Travisarmenta
Registered User
 
Travisarmenta's Avatar
 
Join Date: Oct 2015
Location: Woodbridge Va
Posts: 401
Re: Help...1972 350 W/HEI

Quote:
Originally Posted by geezer#99 View Post
Gotta hate that cobbled togethor stuff.
I’d bite the bullet and rebuild one of the others with a much better kit from Cliff Ruggles.
Quote:
Originally Posted by cadillac_al View Post
It could just be a float adjustment. If there was trash in your new carb, I assume you cleaned the needle and seat good. Were the primary needles moving smoothly/ not jammed or stuck?. If the needle and seat looked clean and the primaries are working like they are supposed to then I would just lower the float and try it again.
Got a hold of Cliff, Short conversation and he steered me exactly where I needed to go, Great guy.

Basic rebuild kit was purchased, used the 72 Dated Q-Jet that was organic to my Burb and runs great. No more re manufactured crap.
Travisarmenta is offline   Reply With Quote
Old 10-15-2018, 11:42 AM   #42
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,495
Re: Help...1972 350 W/HEI

They aren’t all crap.
Sean builds nice carbs.
https://www.smicarburetor.com/

Good to see you got it fixed up.
geezer#99 is offline   Reply With Quote
Old 10-15-2018, 03:02 PM   #43
Dead Parrot
Registered User
 
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,461
Re: Help...1972 350 W/HEI

If you still have the stock exhaust, make sure the riser valve(if it is still there) is working. I learned the hard way many years ago that too much heat on a Q-jet can screw it up, causing severe flooding. In my case, it was a collapsed inner wall on the OEM double wall Y-pipe blocking off one side that caused the problem.

If it is too late to return your newer troublesome Q-jet, worse case, you have a nice source of spare parts for future repairs.
Dead Parrot is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 09:55 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com