needs help getting it running - The 1947 - Present Chevrolet & GMC Truck Message Board Network

K9T8M · 07-12-2009, 03:25 PM

I got the tune up done on the suburban and i still cannot getting it running. Ive got a few issues that i know of, and probably some that i dont.

I just had this truck running last week and drove it all over the yard both friday and saturday.

1st issue- old nasty gas in the tank, so i have been pouring fuel down the carb to get it to fire. which has worked so far.

2nd issue- when you turn the key the truck will run, but the second you turn the key from the start position (when the starter is running) it dies instantly.

I know i need to drop the tank and replace the fuel lines to clean everything, but where should i start? I wouldnt mind getting it running again that way i know im not wasting my time.

Thanks!!

70 shorty · 07-12-2009, 03:27 PM

First I would run gas line from a gas can on teh ground into the fuel pump, therefore byopassing the nasty tank. That way you can keep it running until you get hte fuel tank and lines cleaned. How about the carb, has that been cleaned out? As far as it not running in any position except start, I'm not sure where to go there, I'm no wiring expert.

**jamie72** · 07-12-2009, 03:50 PM

as for it dieing when you let go of the key..do you have hei? if so is it pluged in the right place in the fuse box? you need a key on power source.

K9T8M · 07-12-2009, 03:54 PM

What is this wire on the back of the coil supposed to be connected to?

Where does this ground wire connect to?

K9T8M · 07-12-2009, 03:56 PM

whats hei?

mikajo39 · 07-12-2009, 04:15 PM

Yellow wire goes to neg terminal on coil HEI stands for High Energy Ignition, It's a kinda of ignition, you have points so you don't have to worry bout it

K9T8M · 07-13-2009, 08:50 AM

Actually i replaced the yellow wire with a new one. the yellow one had the insulation worn off in a couple places. Where is the black wire on the back of the coil supposed to go?

QKENUF4U · 07-13-2009, 01:34 PM

uhm isnt that condenser on the back of the coil supposed to be hooked up ?????
the ground strap goes to one of your valve cover bolts..
and boy would HEI make your life easier....

jsmithbm · 07-13-2009, 06:03 PM

Quote:

Originally Posted by 70 shorty

First I would run gas line from a gas can on teh ground into the fuel pump, therefore byopassing the nasty tank. That way you can keep it running until you get hte fuel tank and lines cleaned. How about the carb, has that been cleaned out? As far as it not running in any position except start, I'm not sure where to go there, I'm no wiring expert.

I agree, i would bypas the fuel tank issue and tackle the ignition problem first. Once you get it running or keep it running then you can move onto the fuel issue. That one should be cut and dry. Good Luck.

PanelDeland · 07-13-2009, 06:56 PM

The yellow wir is a bypass for starting points style ignition.There should also be another wire(red or purple I "think" that has resistance built into it.12 volts at start and then about 9 at runfrom the resistance wire.The yellow is only powered during start.
If you can read a wiring diagram here's a link that may help.If you can't....... "there's no time like now"

http://www.67-72chevytrucks.com/vboa...iring+diagrams

jsmithbm · 07-13-2009, 07:47 PM

Quote:

Originally Posted by PanelDeland

The yellow wir is a bypass for starting points style ignition.There should also be another wire(red or purple I "think" that has resistance built into it.12 volts at start and then about 9 at runfrom the resistance wire.The yellow is only powered during start.
If you can read a wiring diagram here's a link that may help.If you can't....... "there's no time like now"

http://www.67-72chevytrucks.com/vboa...iring+diagrams

SWEET

I've been needing something like this. thanks a lot.

cparman · 07-13-2009, 08:16 PM

In the first of 3 pictures you have a capacitor, that looks like the condenser inside the distributor It is for radio interference. NOT NEEDED TO GET TRUCK TO RUN.
The second picture is a ground wire that should be attached to the firewall and to the engine

Need a wiring schematic to tell you about which wire is the one you want to be connected to the + side of the coil. I do see a wire that is attached to the coil and goes to the distributor. Make sure that is on the - side of the coil.

You could have one of two problems in respect to the truck running in the start position. Wiring to the distributor is wrong, or a bad ignition switch. If you have a multimeter, make sure that you have 12+ when the engine is cranking over at the + side of the coil. You will see the voltage drop to about 9v+ with the engine running. If I remember right there are two wires attached together that go to the + side of the coil. One comes from the starter to give the distributor 12+ when cranking, and when the engine starts, and you let go of the key, you should have 9v+ at the + side of the coil. Try holding the ignition switch a bit past run, and not keeping the starter engaged and see if you can keep it running long enough to check voltage at the coil.

07-12-2009, 03:25 PM	#1
K9T8M Registered User Join Date: Jun 2009 Location: Peoria, Illinoise Posts: 29	needs help getting it running I got the tune up done on the suburban and i still cannot getting it running. Ive got a few issues that i know of, and probably some that i dont. I just had this truck running last week and drove it all over the yard both friday and saturday. 1st issue- old nasty gas in the tank, so i have been pouring fuel down the carb to get it to fire. which has worked so far. 2nd issue- when you turn the key the truck will run, but the second you turn the key from the start position (when the starter is running) it dies instantly. I know i need to drop the tank and replace the fuel lines to clean everything, but where should i start? I wouldnt mind getting it running again that way i know im not wasting my time. Thanks!! __________________ Chris 69 Suburban 3\4 Ton 350\4sp- FOR SALE- $2300

07-12-2009, 03:27 PM	#2
70 shorty Where's my beer? Join Date: Oct 2004 Location: Glen Allen, VA Posts: 1,772	Re: needs help getting it nunning First I would run gas line from a gas can on teh ground into the fuel pump, therefore byopassing the nasty tank. That way you can keep it running until you get hte fuel tank and lines cleaned. How about the carb, has that been cleaned out? As far as it not running in any position except start, I'm not sure where to go there, I'm no wiring expert. __________________ 70 C10, shortstep, .30 over 250,Hurst shifted 3 spd parts hauler. Holley 390, Clifford Intake, Header, ported cylinder head, unknown bigger cam. 79 Corvette L82, 4 spd, black, red interior, headers, flowmasters, and unkown bigger cam. '03 Grand Cherokee Laredo, 4.0 4x4 daily driver. 165K miles, and runs great '08 Tahoe LTZ 4x4 155K

07-12-2009, 03:50 PM	#3
jamie72 Senior Member Join Date: Apr 2000 Location: madison indiana Posts: 3,836	Re: needs help getting it nunning as for it dieing when you let go of the key..do you have hei? if so is it pluged in the right place in the fuse box? you need a key on power source. __________________ jamie72 72 BB cheyenne -- Restoration getting started.. member #807 http://www.myspace.com/whitetailobsession www.antlertalk.com

07-12-2009, 03:54 PM	#4
K9T8M Registered User Join Date: Jun 2009 Location: Peoria, Illinoise Posts: 29	Re: needs help getting it nunning What is this wire on the back of the coil supposed to be connected to? Where does this ground wire connect to? __________________ Chris 69 Suburban 3\4 Ton 350\4sp- FOR SALE- $2300

07-12-2009, 03:56 PM	#5
K9T8M Registered User Join Date: Jun 2009 Location: Peoria, Illinoise Posts: 29	Re: needs help getting it nunning whats hei? __________________ Chris 69 Suburban 3\4 Ton 350\4sp- FOR SALE- $2300

07-12-2009, 04:15 PM	#6
mikajo39 Gearhead and audio junkie Join Date: Aug 2008 Location: nunyah Posts: 452	Re: needs help getting it running Yellow wire goes to neg terminal on coil HEI stands for High Energy Ignition, It's a kinda of ignition, you have points so you don't have to worry bout it

07-13-2009, 08:50 AM	#7
K9T8M Registered User Join Date: Jun 2009 Location: Peoria, Illinoise Posts: 29	Re: needs help getting it running Actually i replaced the yellow wire with a new one. the yellow one had the insulation worn off in a couple places. Where is the black wire on the back of the coil supposed to go? __________________ Chris 69 Suburban 3\4 Ton 350\4sp- FOR SALE- $2300

07-13-2009, 01:34 PM	#8
QKENUF4U Senior Member Join Date: Jan 2005 Location: SUNNY WARM BIKE RIDING COTTONWOOD ARIZONA Posts: 2,097	Re: needs help getting it running uhm isnt that condenser on the back of the coil supposed to be hooked up ????? the ground strap goes to one of your valve cover bolts.. and boy would HEI make your life easier.... Last edited by QKENUF4U; 07-13-2009 at 01:34 PM.

07-13-2009, 06:56 PM	#10
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,992	Re: needs help getting it running The yellow wir is a bypass for starting points style ignition.There should also be another wire(red or purple I "think" that has resistance built into it.12 volts at start and then about 9 at runfrom the resistance wire.The yellow is only powered during start. If you can read a wiring diagram here's a link that may help.If you can't....... "there's no time like now" http://www.67-72chevytrucks.com/vboa...iring+diagrams __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

07-13-2009, 08:16 PM	#12
cparman sharp as a marble Join Date: Jan 2007 Location: atlantic beach,florida Posts: 1,082	Re: needs help getting it running In the first of 3 pictures you have a capacitor, that looks like the condenser inside the distributor It is for radio interference. NOT NEEDED TO GET TRUCK TO RUN. The second picture is a ground wire that should be attached to the firewall and to the engine Need a wiring schematic to tell you about which wire is the one you want to be connected to the + side of the coil. I do see a wire that is attached to the coil and goes to the distributor. Make sure that is on the - side of the coil. You could have one of two problems in respect to the truck running in the start position. Wiring to the distributor is wrong, or a bad ignition switch. If you have a multimeter, make sure that you have 12+ when the engine is cranking over at the + side of the coil. You will see the voltage drop to about 9v+ with the engine running. If I remember right there are two wires attached together that go to the + side of the coil. One comes from the starter to give the distributor 12+ when cranking, and when the engine starts, and you let go of the key, you should have 9v+ at the + side of the coil. Try holding the ignition switch a bit past run, and not keeping the starter engaged and see if you can keep it running long enough to check voltage at the coil. Last edited by cparman; 07-13-2009 at 08:17 PM.



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