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#1 |
Registered User
Join Date: Nov 2010
Location: johnstown, CO
Posts: 184
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edlebrock 1406
ok i have an eb1406 with the stock jetting its on a 350
replaced basically my entire ignition system new points ,distributor, rotor, plugs, and coil. my truck was sputtering when i gave it more than half throttle while i was in drive so i rebuilt the carb with the stock jets i live in san diego basically sea level my motor still sputters like its not getting gas whn i give it more than half throttle..im starting to getr frustrated andf pissed cuz im stumped any help with this would be greatly6 appreciatd |
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#2 |
I built it
Join Date: Sep 2008
Location: Bakersfield ca
Posts: 744
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Re: edlebrock 1406
mine used to do that. turns out i had a vacuum leak on the back of the carb, giving a weak signal to the secondarys. my intake is a spread/square bore. and needed the adapter to make it work correctly. put it on and now it works perfectly
__________________
'72 k10 lwb 454, th400, 205, d44ft, 12b rear, 4in skyjacker, 35x12.5-15 superswampers, 4.56, blazer tank. painless wiring harness '98 dodge 3500 12v 5sp 4x4. the truck that actually runs |
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#3 |
Registered User
Join Date: Nov 2010
Location: johnstown, CO
Posts: 184
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Re: edlebrock 1406
ill check mmy vacuum lines today
do u have any sputtering? i have the edlebrock performer intake |
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#4 |
Registered User
![]() Join Date: Apr 2006
Location: San Diego
Posts: 147
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Re: edlebrock 1406
This seems to be a common problem with the 1406. Here is a link to the owner's manual, read it and become familiar with tuning your carb because even elevation changes can alter performance:
http://www.edelbrock.com/automotive_new/misc/tech_center/install/1000/1406_manual.pdf The problem could be that your secondary jets are not pumping either enough fuel or quickly enough. Before half throttle you only use primary jets, after the halfway mark it opens up to feed the intake from the secondarys as well. If there is not any fuel there it causes a lean condition that can produce sputtering and even backfire through the carb. Read up on how to adjust this, and you will be happy you learned about the carb. |
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#5 |
Registered User
Join Date: Dec 2009
Location: Atlanta, Ga.
Posts: 1,050
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For sure i'm a newbie, but i was just reading about the sock in the gas tank getting clogged and causing what your describing?
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#6 |
Registered User
![]() Join Date: Apr 2006
Location: San Diego
Posts: 147
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Re: edlebrock 1406
That could be the problem, if there's not enough fuel getting in it can also create vapor lock. Is the problem worse worse when you gradually accelerate to full throttle? or is it only when you stomp on it?
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#7 |
I built it
Join Date: Sep 2008
Location: Bakersfield ca
Posts: 744
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Re: edlebrock 1406
after i got the vacuum leak fixed it runs like a dream. however i did change the secondary jets 1 "stage" richer for my carb before i found the leak. mine is the 750 performer
__________________
'72 k10 lwb 454, th400, 205, d44ft, 12b rear, 4in skyjacker, 35x12.5-15 superswampers, 4.56, blazer tank. painless wiring harness '98 dodge 3500 12v 5sp 4x4. the truck that actually runs |
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#8 |
Registered User
Join Date: Nov 2010
Location: johnstown, CO
Posts: 184
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Re: edlebrock 1406
well i went and looked to see if any fuel squirted out the the secondary throttle and nothing happend...
..replaced th fuel filter ..fuel pressure good ill pull the carb off the truck tomo at work and ill see if th jets are clogged |
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#9 |
I built it
Join Date: Sep 2008
Location: Bakersfield ca
Posts: 744
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Re: edlebrock 1406
by secondary throttle do you mean the accelerator pump? or fuel coming out the back 2 barrels? free reving the engine almost never gets a signal to secondarys, so you wouldnt see anything.. ill bet you have a vac. leak around the back of the carb. spray some wd-40 or startign fluid around the base of the carb all the way around. if the engine changes rpm or sounds diffrent at all you have a leak.
__________________
'72 k10 lwb 454, th400, 205, d44ft, 12b rear, 4in skyjacker, 35x12.5-15 superswampers, 4.56, blazer tank. painless wiring harness '98 dodge 3500 12v 5sp 4x4. the truck that actually runs |
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#10 |
fat old dude
![]() Join Date: Feb 2010
Location: fresno, california
Posts: 1,424
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Re: edlebrock 1406
i have the same carb, where did you get your rebuild kit.
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1972 c-10 shortbed 350/400 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=389157 1968 workhorse http://67-72chevytrucks.com/vboard/s...d.php?t=446216 Accepting part donations |
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#11 |
Registered User
Join Date: Nov 2010
Location: johnstown, CO
Posts: 184
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Re: edlebrock 1406
i bought little edelbrock kit from pep boys
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#12 |
Registered User
Join Date: Jan 2009
Location: Rockmart, Ga
Posts: 27
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Re: edlebrock 1406
Could be as simple as a clogged fuel filter, just a thought...
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#13 |
Grand PooBaa Member
Join Date: Jan 2001
Location: LA, CA
Posts: 5,302
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Re: edlebrock 1406
Had the same problem, edelbrock said it was my cam. Yeah right, turned out to be a vacuum leak, my head bolts by my plugs were finger loose.
Check everything that deals with vacuum. Last edited by VDOG; 12-08-2010 at 05:51 PM. |
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#14 |
Junior Member
Join Date: Mar 2007
Location: Hideaway, TX
Posts: 4,950
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Re: edlebrock 1406
this would be the first thing I check and it is cheap too
__________________
71 Suburban 350/700R4 Project Trixie 72 CHEVY,Highlander,SWB,396,T400 |
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#15 |
Registered User
Join Date: Nov 2010
Location: johnstown, CO
Posts: 184
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Re: edlebrock 1406
ok i got all the vacuum lines figured out except the back...
i dont know where that would hook up to |
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#16 |
Registered User
![]() Join Date: Oct 2007
Location: Orem, Ut
Posts: 132
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Re: edlebrock 1406
The one on the back goes to the brake booster if you have one. If no power brakes, just plug the back port.
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#17 | ||
MadMan
Join Date: Nov 2010
Location: Hammond, La.
Posts: 490
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Re: edlebrock 1406
Quote:
Quote:
I did a rebuild this summer... put a Edlebrock 1406, Will Hoite Roller Cam, GM Z06 Bee-hive Springs, vortec swap in my 81"... It has been giving me the bluez. I'm having the same issue with the engine falling on its face above 3,000 rpm. I will order a rebuild kit and see if i can get this problem solved. I was about to take the engine out and tear it apart |
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#18 | |
I built it
Join Date: Sep 2008
Location: Bakersfield ca
Posts: 744
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Re: edlebrock 1406
Quote:
__________________
'72 k10 lwb 454, th400, 205, d44ft, 12b rear, 4in skyjacker, 35x12.5-15 superswampers, 4.56, blazer tank. painless wiring harness '98 dodge 3500 12v 5sp 4x4. the truck that actually runs |
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#19 |
Registered User
Join Date: Nov 2010
Location: johnstown, CO
Posts: 184
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Re: edlebrock 1406
this damn thing has me confused
is there any one in the san diego area who could possibly help me with this thing |
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#20 | |
MadMan
Join Date: Nov 2010
Location: Hammond, La.
Posts: 490
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Re: edlebrock 1406
Quote:
270 Adv Dur Intake lift .495/.218@50 Exhaust lift .502/.224@50 I'm really thinking about putting a wideband on it to monitor my air/fuel... I'm adding NOS later so I might as well get it now Last edited by 81ShrtBox; 12-09-2010 at 06:36 PM. |
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