truck acts erratically in the cold - The 1947 - Present Chevrolet & GMC Truck Message Board Network

crm318 · 01-14-2007, 12:04 AM

its getting pretty cold here in Texas (reletively) and my truck is really messing up lately. i will start it and get it running and it will idle alright. then when i get out on to the road, i will come to my first stop sign and the truck will idle at arund 500 but you can barley hear it and then it will try to die. i have to ride the brake to keep it alive. i have to do this for the first 10 min of driving. then i can get on the freeway with the heater going (and its hot) and it will still do this when i come to a stop. this will only go on for the first 10 min. i can also rev it to high hell and it will still do this. what is going on?

centsless · 01-14-2007, 12:07 AM

Sounds like the choke is adjusted closed too much, or the choke pull off is not working.

crm318 · 01-14-2007, 12:24 AM

the choke is actually not connected and is at the wide open position

Rick Mills · 01-14-2007, 12:24 AM

I had some really bad fuel affect the float needle once. It acted like your description. It is a Holley 800 DP. I pulled the needle seat and it had little crystals on it. Sprayed some WD-40 on it and put it back in - set the fuel level and haven't had a problem since.

crm318 · 01-14-2007, 05:05 AM

im using a quadrajet. i will give it a look over.

Robert1970C20rstbukt · 01-14-2007, 12:54 PM

Yeah check the fuel bowl on the carb, had the same problem with mine.

crm318 · 01-14-2007, 04:30 PM

what would i look for in the fuel bowl?

gouldie · 01-14-2007, 05:03 PM

also because you said it was getting cold the mixture could be affected.

crm318 · 01-14-2007, 10:29 PM

how would i go about fixing this?

**VetteVet** · 01-14-2007, 11:07 PM

If this isn't enough there is plenty more.

http://www.florida4x4.com/tech/quadr...ning_Paper.doc

gouldie · 01-15-2007, 02:38 AM

just play with the mixture screw until it runs right.

01-14-2007, 12:04 AM	#1
crm318 Alright Alright Alright Join Date: Mar 2004 Location: Midland, Texas Posts: 1,672	truck acts erratically in the cold its getting pretty cold here in Texas (reletively) and my truck is really messing up lately. i will start it and get it running and it will idle alright. then when i get out on to the road, i will come to my first stop sign and the truck will idle at arund 500 but you can barley hear it and then it will try to die. i have to ride the brake to keep it alive. i have to do this for the first 10 min of driving. then i can get on the freeway with the heater going (and its hot) and it will still do this when i come to a stop. this will only go on for the first 10 min. i can also rev it to high hell and it will still do this. what is going on? __________________ 1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies

01-14-2007, 12:07 AM	#2
centsless sufficiently talented fool Join Date: Jun 2006 Location: Forest Hill, MD Posts: 2,231	Re: truck acts erratically in the cold Sounds like the choke is adjusted closed too much, or the choke pull off is not working. __________________ "it's impossible to be surrounded by idiots when you are part of the circle" 2003 Suburban 2002 Pontiac Montana 1981 Corvette 1966 Impala Convertible Click here to support the board

01-14-2007, 12:24 AM	#3
crm318 Alright Alright Alright Join Date: Mar 2004 Location: Midland, Texas Posts: 1,672	Re: truck acts erratically in the cold the choke is actually not connected and is at the wide open position __________________ 1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies

01-14-2007, 12:24 AM	#4
Rick Mills Senior Member Join Date: Dec 2003 Location: Colorado Posts: 351	Re: truck acts erratically in the cold I had some really bad fuel affect the float needle once. It acted like your description. It is a Holley 800 DP. I pulled the needle seat and it had little crystals on it. Sprayed some WD-40 on it and put it back in - set the fuel level and haven't had a problem since. __________________ The Fastor Pastor '68 swb, 447 BBC/ 6-71 Weiand, Dual 950 Bigs Carbs/ 2 1/2" Header tubes - 4" collectors/ M-21 4speed: '70 swb; TH-400 - bagged & shaved. Looking for new engine or parts. Wife - Original {A Real Classic!}

01-14-2007, 05:05 AM	#5
crm318 Alright Alright Alright Join Date: Mar 2004 Location: Midland, Texas Posts: 1,672	Re: truck acts erratically in the cold im using a quadrajet. i will give it a look over. __________________ 1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies

01-14-2007, 12:54 PM	#6
Robert1970C20rstbukt Registered User Join Date: Jun 2004 Location: Beeville, Texas Posts: 1,943	Re: truck acts erratically in the cold Yeah check the fuel bowl on the carb, had the same problem with mine. __________________ RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck

01-14-2007, 04:30 PM	#7
crm318 Alright Alright Alright Join Date: Mar 2004 Location: Midland, Texas Posts: 1,672	Re: truck acts erratically in the cold what would i look for in the fuel bowl? __________________ 1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies

01-14-2007, 05:03 PM	#8
gouldie Registered User Join Date: Oct 2006 Location: daytona beach Posts: 101	Re: truck acts erratically in the cold also because you said it was getting cold the mixture could be affected. __________________ 67 c10 250 I6 3 on the tree no options air ride, paint and big block coming within the next 23 years 2001 mustang gt for going fast

01-14-2007, 10:29 PM	#9
crm318 Alright Alright Alright Join Date: Mar 2004 Location: Midland, Texas Posts: 1,672	Re: truck acts erratically in the cold how would i go about fixing this? __________________ 1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies

01-14-2007, 11:07 PM	#10
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,709	Re: truck acts erratically in the cold If this isn't enough there is plenty more. http://www.florida4x4.com/tech/quadr...ning_Paper.doc __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.

01-15-2007, 02:38 AM	#11
gouldie Registered User Join Date: Oct 2006 Location: daytona beach Posts: 101	Re: truck acts erratically in the cold just play with the mixture screw until it runs right. __________________ 67 c10 250 I6 3 on the tree no options air ride, paint and big block coming within the next 23 years 2001 mustang gt for going fast



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