Need some advice on a truck cutting out, weak going up hill. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

anx · 01-17-2011, 12:50 PM

I have a 1980 chevy k20 long bed with a 350. have had it for a couple years and its been a great truck.

Latley it has been cutting out almost stalling on heavy acceleration especially going up hills. Ive changed the plugs, wires, cap, rotor, and fuel filter. none have made any difference.

Truck starts and idles great. runs pretty normal at low speeds. i have been avoiding any hills to and from work. but i would really like to get it right again.

I am thinking maybe fuel pump or vac advance in distributer or maybe the carb. but money is tight and i thought maybe someone would have some advice or thoughts before i just start spending money guessing.

Thanks for any help!

benoit454 · 01-17-2011, 02:07 PM

change the fuel inlet screen in the carb? If you got a way to check it test the fp if not buy one they are cheap. It very well could be the carb we had that happen to our 84 with a quadrajet, cut out and missed bad going up hill or under hard throttle. We swapped carbs to an edelbrock I rebuilt and was just fine afterwards.

**old Rusty C10** · 01-17-2011, 09:17 PM

sounds like a fuel filter to me

1LowToy · 01-17-2011, 09:46 PM

A coil breaking down or a week or failing ignition control module can cause a mis-fire under a load. Most of your big box auto parts stores can test them for you.

**78 Big10 454** · 01-18-2011, 02:47 AM

I had that problem and it was bad cats. I had to replace my entire exhaust system.

gchemist · 01-18-2011, 05:12 AM

Fuel pump! I had a similiar problem going up hills. Eventually the fuel pump failed.

anx · 01-18-2011, 10:09 AM

Thanks for the replies, I dont have cats and changed the fuel filter already. i will grab a fuel pump after work if i can find one locally.

Then i will try coil or module next. probably save carb for last, never have been to great at rebuilding qjets lol.
thanks again!

anx · 01-19-2011, 08:02 AM

Fuel pump was the problem. I hit the biggest hills I could find on the way in this morning and it didnt cut out at all.

Thanks for the help everyone! its nice to have others opinions sometimes before just spending money lol

Chris

01-17-2011, 12:50 PM	#1
anx Registered User Join Date: Sep 2007 Location: cleveland ohio Posts: 9	Need some advice on a truck cutting out, weak going up hill. I have a 1980 chevy k20 long bed with a 350. have had it for a couple years and its been a great truck. Latley it has been cutting out almost stalling on heavy acceleration especially going up hills. Ive changed the plugs, wires, cap, rotor, and fuel filter. none have made any difference. Truck starts and idles great. runs pretty normal at low speeds. i have been avoiding any hills to and from work. but i would really like to get it right again. I am thinking maybe fuel pump or vac advance in distributer or maybe the carb. but money is tight and i thought maybe someone would have some advice or thoughts before i just start spending money guessing. Thanks for any help!

01-17-2011, 02:07 PM	#2
benoit454 Chris Join Date: Nov 2004 Location: Monaville, WV Posts: 3,737	Re: Need some advice on a truck cutting out, weak going up hill. change the fuel inlet screen in the carb? If you got a way to check it test the fp if not buy one they are cheap. It very well could be the carb we had that happen to our 84 with a quadrajet, cut out and missed bad going up hill or under hard throttle. We swapped carbs to an edelbrock I rebuilt and was just fine afterwards. __________________ Chris GIT R DONE!!!!!! Check out all our rides, http://www.cardomain.com/id/benwa454

01-17-2011, 09:17 PM	#3
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	Re: Need some advice on a truck cutting out, weak going up hill. sounds like a fuel filter to me __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

01-17-2011, 09:46 PM	#4
1LowToy Registered User Join Date: Nov 2009 Location: Sonora California Posts: 860	Re: Need some advice on a truck cutting out, weak going up hill. A coil breaking down or a week or failing ignition control module can cause a mis-fire under a load. Most of your big box auto parts stores can test them for you.

01-18-2011, 02:47 AM	#5
78 Big10 454 78 Big10 454 Join Date: Jul 2008 Location: Pismo Beach, CA Posts: 839	Re: Need some advice on a truck cutting out, weak going up hill. I had that problem and it was bad cats. I had to replace my entire exhaust system.

01-18-2011, 05:12 AM	#6
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: Need some advice on a truck cutting out, weak going up hill. Fuel pump! I had a similiar problem going up hills. Eventually the fuel pump failed. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

01-18-2011, 10:09 AM	#7
anx Registered User Join Date: Sep 2007 Location: cleveland ohio Posts: 9	Re: Need some advice on a truck cutting out, weak going up hill. Thanks for the replies, I dont have cats and changed the fuel filter already. i will grab a fuel pump after work if i can find one locally. Then i will try coil or module next. probably save carb for last, never have been to great at rebuilding qjets lol. thanks again!

01-19-2011, 08:02 AM	#8
anx Registered User Join Date: Sep 2007 Location: cleveland ohio Posts: 9	Re: Need some advice on a truck cutting out, weak going up hill. Fuel pump was the problem. I hit the biggest hills I could find on the way in this morning and it didnt cut out at all. Thanks for the help everyone! its nice to have others opinions sometimes before just spending money lol Chris



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