The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-18-2014, 08:05 PM   #1
Liftedchevrolet
Registered User
 
Join Date: Jun 2014
Location: Red Lion Pa
Posts: 18
Truck dying and and sputtering up hills.

I have a 72 chevy k10 pickup. It runs great but today while coming up big hills it sputtered and on the second big hill totally shut off. There was fuel in the inline fuel filter. Once I got towed up the hill and on flat ground I cranked it a few times to get gas back in the line. Then it started up. Any ideas?
Liftedchevrolet is offline   Reply With Quote
Old 08-19-2014, 09:28 AM   #2
turp mcspray
Registered User
 
turp mcspray's Avatar
 
Join Date: May 2007
Location: Rapid City South Dakota
Posts: 2,359
Re: Truck dying and and sputtering up hills.

Sure sounds like a fuel issue. If the filter isn't clogged, then your pump may be on its last leg.
__________________
Turp Mcspray
New life for an old 2wd, farm blazer
http://67-72chevytrucks.com/vboard/s...d.php?t=505987
My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299
turp mcspray is offline   Reply With Quote
Old 08-19-2014, 11:56 AM   #3
Liftedchevrolet
Registered User
 
Join Date: Jun 2014
Location: Red Lion Pa
Posts: 18
Re: Truck dying and and sputtering up hills.

Quote:
Originally Posted by turp mcspray View Post
Sure sounds like a fuel issue. If the filter isn't clogged, then your pump may be on its last leg.
It got gas as soon as I cranked it a few times. Would the pump be spooky or go out all at once.
Liftedchevrolet is offline   Reply With Quote
Old 08-19-2014, 12:23 PM   #4
hounddogs!
Restoring it $200 at a time...
 
hounddogs!'s Avatar
 
Join Date: Aug 2008
Location: NE Kansas
Posts: 887
Re: Truck dying and and sputtering up hills.

Quote:
Originally Posted by Liftedchevrolet View Post
It got gas as soon as I cranked it a few times. Would the pump be spooky or go out all at once.
The pump could certainly go out gradually. I had a tear that started on the outside edge of the diaphragm. As the tear grew, fuel delivery got more and more sporadic.
__________________
Charter member of the 'Put the dimmer switch back on the damn floor where it belongs' Society


'68 5.3L-4 speed LWB C20; grandpa bought it for the farm in '71. Now LS 5.3, rather than 327.

DD '09 Pilot

Weekender '65 Skylark 300-4V-4 speed

Wife's '07 Lexus ES350; 117 actuator motors and I can't see the engine.

Son's '04 F250 SuperCab 6.0
hounddogs! is offline   Reply With Quote
Old 08-19-2014, 01:47 PM   #5
Ol Blue K20
Proprietor of Dale's Corner
 
Ol Blue K20's Avatar
 
Join Date: Nov 2012
Location: Vacaville , CA
Posts: 16,245
Re: Truck dying and and sputtering up hills.

How much fuel is in your tank? Might be a pick up problem in the tank.
__________________
"Some Days Chickens And Some Days Feathers"

Dale
XNGH ECV Sam Brannan 1004

R.I.P. 67ChevyRedneck
R.I.P. Grumpy Old Man
R.I.P. FleetsidePaul
Ol Blue K20 is offline   Reply With Quote
Old 08-19-2014, 02:57 PM   #6
quick60
Registered User
 
quick60's Avatar
 
Join Date: Dec 2012
Location: Virginia
Posts: 233
Re: Truck dying and and sputtering up hills.

Maybe spark plug wires, wires not snapped onto cap or plugs all the way. Under load resistance is increased and can cause missing.
quick60 is offline   Reply With Quote
Old 08-20-2014, 08:36 AM   #7
O'l Buck
Recovering Truck Driver
 
O'l Buck's Avatar
 
Join Date: Mar 2002
Location: Orleans, NE USA
Posts: 1,883
Re: Truck dying and and sputtering up hills.

When my fuel pump went on the 67 it would surge and hop going up hills and run fine down hill and on flat ground, if the hill was very long, it would completely die.
__________________
67 K-20 350, SM465, Eaton rear, 4.56 no spin option
00 Dodge 2500 4x4, 24V cummins, 5 speed

Chad
South Central Nebraska
O'l Buck is offline   Reply With Quote
Old 08-20-2014, 08:49 AM   #8
brown7373
Registered User
 
brown7373's Avatar
 
Join Date: May 2011
Location: Fort Pierce, FL
Posts: 430
Re: Truck dying and and sputtering up hills.

Sounds like my 69 GTO back in 1973. The primary wire (points to the negative of the coil) had gotten pinched. The wire strands were cut through, but the backside insulation held it together. The increased resistance showed up going up hills, and it would sputter and sometimes shut off. When the wire strands made contact, it ran. If they vibrated apart it sputtered or shut off.

Unless you find an obvious fuel issue, it sounds ignition related to me.
brown7373 is offline   Reply With Quote
Old 08-20-2014, 09:05 AM   #9
no1udknow
Registered User
 
no1udknow's Avatar
 
Join Date: Jan 2014
Location: Sacramento,California
Posts: 696
Re: Truck dying and and sputtering up hills.

Do you drive it all the time? If not it could potentially be a stuck float in the carb, not enough gas in the bowl and when you head up hills it starves out. Other than that I would check the tank or like brown said, maybe something loose. Is your tank still in the cab or under the truck somewhere? I have heard of people denting their tanks while wheeling and bending up the fuel pick-up.
__________________
Built not bought!
My dad always tried to convince me HEI was pointless!
Welding is a lot like sex, you don't have to be great with the rod as long as you thoroughly prep the surface and your good at grinding
My build : 68 C10 Short Bed Conversion
no1udknow is offline   Reply With Quote
Old 08-20-2014, 01:32 PM   #10
BB72CHEVKT
Junior Member
 
BB72CHEVKT's Avatar
 
Join Date: Mar 2007
Location: Hideaway, TX
Posts: 4,950
Re: Truck dying and and sputtering up hills.

fuel pump is on its last leg, $12 bucks give or take to replace
__________________
71 Suburban 350/700R4 Project Trixie
72 CHEVY,Highlander,SWB,396,T400
BB72CHEVKT is offline   Reply With Quote
Old 08-20-2014, 05:49 PM   #11
stsalvage
Scrapper 1
 
stsalvage's Avatar
 
Join Date: Jan 2007
Location: Riverside Calif
Posts: 1,649
Re: Truck dying and and sputtering up hills.

How many miles on the eng do you have low vacuum if so you might be getting a Flat cam.there is a short bolt on the front of the engine that lets you stop the rod that makes the fuel pump work seen guys put to long of a bolt in and take the lobe off the cam funnest thing to see on a motor that only has 300 miles on it and your truck goes lean and burns up the motor or puts a hole throw the piston.

I did it to my 1965 3/4 ton truck had over 750K miles wore down the cam had 5-6 pounds of vacuum the brakes would hardly work and i had power brakes and my fuel what fuel and my truck ran Hot.

Probable none of you will ever do it or see it in your life time to see a cam go complety round your lifter hardly move
stsalvage is offline   Reply With Quote
Old 08-23-2014, 12:41 AM   #12
MagmaJct
Registered User
 
MagmaJct's Avatar
 
Join Date: May 2008
Location: Mesa, AZ
Posts: 281
Re: Truck dying and and sputtering up hills.

I had vapor lock like symptoms before my fuel pump failed completely. I even replaced my fan clutch as a Hail Mary attempt to solve the problem.

I once got stranded in a landfill. Yeah, it was over 110*F that day. Eventually, it failed for good. After a new pump was installed, I have yet to have a problem 2, maybe 3 years later!

In hindsight, I should have checked the fuel pressure.
__________________
I own 3 classic vehicles. 1971 LWB C10 Deluxe. 1974 VW Super Beetle. 1971 VW Fastback.

The C10 and the Super Beetle run, the Fastback is just not there yet!

Please visit my Super Beetle and Fastback profile on TheSamba.
MagmaJct is offline   Reply With Quote
Old 08-23-2014, 11:29 AM   #13
brown7373
Registered User
 
brown7373's Avatar
 
Join Date: May 2011
Location: Fort Pierce, FL
Posts: 430
Re: Truck dying and and sputtering up hills.

Have you checked the sock in the fuel tank on the pickup tube? It gradually becomes clogged and can restrict fuel flow.
brown7373 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 09:05 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com