Need some engine help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**BOSS** · 01-05-2004, 11:14 PM

Hey guys,I need some advice on the 350 sbc.I was on my way home tonight(about an hour drive)and about half way home the truck spit one time then when i pull in the driveway it tries to die on me.Only way to start it is to hole the pedal to the floor,it wont idle.It is a fairly new 1406 edlebrock and a new engine.I have3 had trouble with dist,coils but have changed all of them.I havent done anything to it lately so i am stumped.Any ideas on what it is?Thanx

bigvinnie · 01-05-2004, 11:26 PM

that's not a lot to go on... are there any new noises, either while driving or idling... did it behave normally while driving, as far as acceleration and power???

when you say it spit, do you mean it backfired or did it stop running for an instant...???

are you running points or hei...???

will it stay running in neutral/park if you give it gas...???

**BOSS** · 01-05-2004, 11:55 PM

No new noises,It drove great on the way home,like always.I believed it backfired throught the carb,Hei and it will stay running as long as you give it gas.Anything else?Thanx

**BOSS** · 01-06-2004, 12:42 AM

Come on guys i need to get this fixed before it strands me in the cold.HELP!!!!!!!!!!!!!!!!!!!

fast71 · 01-06-2004, 12:46 AM

Is it getting to much gas? checked for a MAJOR vacuum leak? a small back fire could have blown off a vauum cap or a gasket .

**BOSS** · 01-06-2004, 12:49 AM

Thanx i will check that in the morning,going to be around 7 degrees then............lol

chevydog66 · 01-06-2004, 12:57 AM

What about some bad gas? Ya, check all the plug wires and make sure they are all connected. I would also pull the #1 spark plug and see if it is running too rich or lean. The plug should have a slightly tan tip if it is burning good.

chevydog66 · 01-06-2004, 12:58 AM

Oh ya. Always err to the rich.

doughby82 · 01-06-2004, 04:24 AM

sounds almost like the choke is stuck

bigjimzlll · 01-06-2004, 11:50 AM

as cold as it is..could the fuel line be freezing? a little water in the gas can freeze and block passages in the carb

**BOSS** · 01-06-2004, 10:28 PM

It ran ok on the way home tonight.This morning i tightened the carb just a little but about halfway home again tonight it backfired through the carb again.Any ideas?

86SILVERADO · 01-06-2004, 10:38 PM

A long shot but check your fuel lines for any small holes or the rubber hoses for cracks that could be sucking air.

jorgensensc · 01-06-2004, 11:28 PM

Make sure your distributer holdown isn't loose and your hei isn't turning. It could be you need to adjust the carb because of the cold weather also.

**BOSS** · 01-06-2004, 11:42 PM

How do i adjust the carb?Not done that on a edlebrock before and i have heard that they are touchy.

*1972C10* · 01-07-2004, 12:03 AM

There not touchy i start off at 1 1/2 turns out and fine tune from there some times try 2 1/2 if its a large engine

sneakysnake · 01-07-2004, 04:44 PM

sounds like a sticking float?

Dean · 01-07-2004, 05:10 PM

I had the float stick on my 1406, but you should see black smoke rolling out of the exhaust.

01-05-2004, 11:26 PM	#2
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	that's not a lot to go on... are there any new noises, either while driving or idling... did it behave normally while driving, as far as acceleration and power??? when you say it spit, do you mean it backfired or did it stop running for an instant...??? are you running points or hei...??? will it stay running in neutral/park if you give it gas...??? __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project

01-05-2004, 11:55 PM	#3
BOSS Just here to help Join Date: Jan 2002 Location: Norwood,Mo Posts: 3,893	No new noises,It drove great on the way home,like always.I believed it backfired throught the carb,Hei and it will stay running as long as you give it gas.Anything else?Thanx __________________ Support our site Norwood Survivor

01-06-2004, 12:42 AM	#4
BOSS Just here to help Join Date: Jan 2002 Location: Norwood,Mo Posts: 3,893	Come on guys i need to get this fixed before it strands me in the cold.HELP!!!!!!!!!!!!!!!!!!! __________________ Support our site Norwood Survivor

01-06-2004, 12:46 AM	#5
fast71 Drive it like U stole it Join Date: Mar 2000 Location: tunnel hill ,GA /Chatt,TN Posts: 956	Is it getting to much gas? checked for a MAJOR vacuum leak? a small back fire could have blown off a vauum cap or a gasket . __________________ 71 custom 10 swb 72 nova ss 72 nova custom 87 s10 96 burb 94 camry 53 5 window 3100

01-06-2004, 12:49 AM	#6
BOSS Just here to help Join Date: Jan 2002 Location: Norwood,Mo Posts: 3,893	Thanx i will check that in the morning,going to be around 7 degrees then............lol __________________ Support our site Norwood Survivor

01-05-2004, 11:14 PM	#1
BOSS Just here to help Join Date: Jan 2002 Location: Norwood,Mo Posts: 3,893	Need some engine help Hey guys,I need some advice on the 350 sbc.I was on my way home tonight(about an hour drive)and about half way home the truck spit one time then when i pull in the driveway it tries to die on me.Only way to start it is to hole the pedal to the floor,it wont idle.It is a fairly new 1406 edlebrock and a new engine.I have3 had trouble with dist,coils but have changed all of them.I havent done anything to it lately so i am stumped.Any ideas on what it is?Thanx __________________ Support our site Norwood Survivor

01-06-2004, 12:57 AM	#7
chevydog66 GM ONLY BABY!!! Join Date: Oct 2003 Location: Fort Wayne, IN. Posts: 1,998	What about some bad gas? Ya, check all the plug wires and make sure they are all connected. I would also pull the #1 spark plug and see if it is running too rich or lean. The plug should have a slightly tan tip if it is burning good. __________________ 2 wrongs don't make a right, but 3 lefts do. 66 Chevelle Malibu 406ci, 573hp, 10.99@121mph 96 Chevy Silverado Z71 72 GMC 1500 Super Custom LS 6.0/4L65 on airride http://www.cardomain.com/ride/707879...mc-c-k-pick-up

01-06-2004, 12:58 AM	#8
chevydog66 GM ONLY BABY!!! Join Date: Oct 2003 Location: Fort Wayne, IN. Posts: 1,998	Oh ya. Always err to the rich. __________________ 2 wrongs don't make a right, but 3 lefts do. 66 Chevelle Malibu 406ci, 573hp, 10.99@121mph 96 Chevy Silverado Z71 72 GMC 1500 Super Custom LS 6.0/4L65 on airride http://www.cardomain.com/ride/707879...mc-c-k-pick-up

01-06-2004, 04:24 AM	#9
doughby82 Registered User Join Date: Mar 2001 Location: springfield ill Posts: 836	sounds almost like the choke is stuck __________________ springfield illinois 2003 custom (harley)built from scratch 68 swb

01-06-2004, 11:50 AM	#10
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	as cold as it is..could the fuel line be freezing? a little water in the gas can freeze and block passages in the carb __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

01-06-2004, 10:28 PM	#11
BOSS Just here to help Join Date: Jan 2002 Location: Norwood,Mo Posts: 3,893	It ran ok on the way home tonight.This morning i tightened the carb just a little but about halfway home again tonight it backfired through the carb again.Any ideas? __________________ Support our site Norwood Survivor

01-06-2004, 10:38 PM	#12
86SILVERADO Registered User Join Date: Dec 2002 Location: Hills of Western Mass Posts: 626	A long shot but check your fuel lines for any small holes or the rubber hoses for cracks that could be sucking air. __________________ 86 Silverado C10 back to 305 power! 67 C30 Dually Dump, with 350 transplant, Rockhauler 05 Duramax 3500 "If at first you don't succeed, try a bigger hammer" Member of the 1-Ton club!

01-06-2004, 11:28 PM	#13
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Make sure your distributer holdown isn't loose and your hei isn't turning. It could be you need to adjust the carb because of the cold weather also. __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

01-06-2004, 11:42 PM	#14
BOSS Just here to help Join Date: Jan 2002 Location: Norwood,Mo Posts: 3,893	How do i adjust the carb?Not done that on a edlebrock before and i have heard that they are touchy. __________________ Support our site Norwood Survivor

01-07-2004, 12:03 AM	#15
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	There not touchy i start off at 1 1/2 turns out and fine tune from there some times try 2 1/2 if its a large engine



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01-07-2004, 04:44 PM	#16
sneakysnake It's a catastrophic success. Join Date: Jan 2003 Location: Oklahoma Posts: 2,077	sounds like a sticking float?

01-07-2004, 05:10 PM	#17
Dean Senior Member Join Date: Jan 2000 Location: Cincinnati, Ohio Posts: 1,492	I had the float stick on my 1406, but you should see black smoke rolling out of the exhaust.

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