Ok. I got a job, I REALLY need to get my truck running - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Russell · 09-14-2003, 12:41 PM

Ok, I got a job, as the title says, and my truck still won't run when it is cold, and I don't have half an hour after school to warm it up to drive ten minutes down the road. The distributer isn't the problem, it smells of very rich fuel when it tries to run, and it often backfires. The ignition system, as I said, isn't at fault, becuase it all runs just fine once it is warm, which leads me to believe that it has something to do with the automatic choke. Does anyone have any diagrams of how it works, where all the vaccume fittings are, and how it affects the carb? I have today to get it running, there are no other vehicles in the house that I can use, other than the 03 diesel, which my father REALLY doesn't want to insure me on for obvious reasons... (sitting outside in the open just waiting to get vandalized, etc)

Cole's 87 · 09-14-2003, 01:05 PM

It would help if we knew what carb your running. Quadra Jet, Edelbrock, Holley, ect ? Does it have electric choke or sring style down in the intake?

*mike reeh* · 09-14-2003, 01:52 PM

whats the weather like where you live? If it gets real cold you'll probably want a choke. But for temporary use, you could just wire the choke open. It sounds like the choke is probably sticking and not opening when its supposed to.

mike

Russell · 09-14-2003, 03:24 PM

It it in a heated garage, so I don't think I would need the choke at home, but I may need it at work unless I can snag a spot with an outlet for my block heater...

I'm not sure what type of carb I have, it was installed with the new engine before, and only my grandfather would know (its too covered with junk to be able to tell)

What bothers me is that it has been working until I have it a tuneup a week or so back, so I am thinking I unplugged something...

Lynx · 09-14-2003, 03:55 PM

check for any vaccume leaks, that could cause a problem untill warm up. Maybe you unpuged a hose or just rooting around in there broke a junction or cracked somthing.

Ben

Lynx · 09-14-2003, 03:55 PM

check for any vaccume leaks, that could cause a problem untill warm up. Maybe you unpuged a hose or just rooting around in there broke a junction or cracked somthing.

Ben

87 STEPPER · 09-14-2003, 05:32 PM

Quit school

Problem solved

Silveradoshorty · 09-14-2003, 05:35 PM

This site might help you ID your carb, http://www.carbs.net/carbinf.htm It sounds like your choke may be opening to early. After a cold start, try closing the choke plate by hand until there is a 1/4-5/16 gap to the airhorn to see if it smoothes out. If after partially blocking airflow, it idles a bit smoother, the vacuum signal may be too low at idle causing the choke to open to soon or maybe the spring is shot ( too weak ) and is coming off too early. I have a buddy that went thru all that and replaced the choke unit & bingo, problem solved.
If it's an electric choke, did it get unplugged? Hope you get it fixed soon, that -40 weather ain't that far away.

Good Luck

navybear70 · 09-14-2003, 07:52 PM

Quote:

If it's an electric choke, did it get unplugged? Hope you get it fixed soon, that -40 weather ain't that far away.

Yeah, I know how you feel. Its getting into the seventy's here at night...after it rains...with a strong breeze...

09-14-2003, 12:41 PM	#1
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Ok. I got a job, I REALLY need to get my truck running Ok, I got a job, as the title says, and my truck still won't run when it is cold, and I don't have half an hour after school to warm it up to drive ten minutes down the road. The distributer isn't the problem, it smells of very rich fuel when it tries to run, and it often backfires. The ignition system, as I said, isn't at fault, becuase it all runs just fine once it is warm, which leads me to believe that it has something to do with the automatic choke. Does anyone have any diagrams of how it works, where all the vaccume fittings are, and how it affects the carb? I have today to get it running, there are no other vehicles in the house that I can use, other than the 03 diesel, which my father REALLY doesn't want to insure me on for obvious reasons... (sitting outside in the open just waiting to get vandalized, etc) __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

09-14-2003, 01:52 PM	#3
mike reeh 5 day ban, learn to behave. Join Date: Nov 2002 Location: san diego, ca Posts: 683	Re: Ok. I got a job, I REALLY need to get my truck running whats the weather like where you live? If it gets real cold you'll probably want a choke. But for temporary use, you could just wire the choke open. It sounds like the choke is probably sticking and not opening when its supposed to. mike

09-14-2003, 03:24 PM	#4
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	It it in a heated garage, so I don't think I would need the choke at home, but I may need it at work unless I can snag a spot with an outlet for my block heater... I'm not sure what type of carb I have, it was installed with the new engine before, and only my grandfather would know (its too covered with junk to be able to tell) What bothers me is that it has been working until I have it a tuneup a week or so back, so I am thinking I unplugged something... __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

09-14-2003, 03:55 PM	#5
Lynx Registered User Join Date: Jun 2003 Location: Fort McMurray, Alberta, Canada Posts: 513	check for any vaccume leaks, that could cause a problem untill warm up. Maybe you unpuged a hose or just rooting around in there broke a junction or cracked somthing. Ben __________________ Ben 1983 Silverado SWB 305 2002 Silverado Extended Cab 5.3 http://members.shaw.ca/bkennett

09-14-2003, 03:55 PM	#6
Lynx Registered User Join Date: Jun 2003 Location: Fort McMurray, Alberta, Canada Posts: 513	check for any vaccume leaks, that could cause a problem untill warm up. Maybe you unpuged a hose or just rooting around in there broke a junction or cracked somthing. Ben __________________ Ben 1983 Silverado SWB 305 2002 Silverado Extended Cab 5.3 http://members.shaw.ca/bkennett

09-14-2003, 01:05 PM	#2
Cole's 87 Registered User Join Date: Nov 2002 Posts: 272	It would help if we knew what carb your running. Quadra Jet, Edelbrock, Holley, ect ? Does it have electric choke or sring style down in the intake?

09-14-2003, 05:32 PM	#7
87 STEPPER STILL PLAYS WITH TRUX Join Date: Nov 2002 Location: Melbourne, Fla. Posts: 2,764	Quit school Problem solved __________________ ~~Bruce~~ MY 87 STEPPER MY 99 2D/WD TAHOE

09-14-2003, 05:35 PM	#8
Silveradoshorty Registered User Join Date: Sep 2002 Location: Winterpeg Manisnowba, Canada Posts: 60	This site might help you ID your carb, http://www.carbs.net/carbinf.htm It sounds like your choke may be opening to early. After a cold start, try closing the choke plate by hand until there is a 1/4-5/16 gap to the airhorn to see if it smoothes out. If after partially blocking airflow, it idles a bit smoother, the vacuum signal may be too low at idle causing the choke to open to soon or maybe the spring is shot ( too weak ) and is coming off too early. I have a buddy that went thru all that and replaced the choke unit & bingo, problem solved. If it's an electric choke, did it get unplugged? Hope you get it fixed soon, that -40 weather ain't that far away. Good Luck __________________ 1985 Silverado S/W 454 TH400, 4 wheel Disk Brakes, B&M Floor Shifter, 9" rear, lowered 4/6.

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