67 K10, slow and go problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

killer_mike · 06-09-2008, 06:48 PM

Hey guys. First of all understand that since i bought this truck most of the time was in the garage, and i been driving it for a couple of days. Anyways, today i went out to run some errands and on the way home the truck started to slow down, and go, slow down and go, did it for about 30 to 60 seconds, i slowed down and started slowly and it was good again but it kept doing it on 2 other ocasions, does it on any gear, except reverse.

What it does is like kinda loses power but dont die, and then recovers. Im thinking maybe is dirty gas tank, z-bar problems [is a little lose] or the clutch is kaput. Any ideas?

PanelDeland · 06-09-2008, 06:55 PM

Fuel, and ignition come to mind.
Maybe a dirty fuel filter,bad pump or carb,may be starving the engine for fuel.Or if it's still running the original points system they could cause the problem.

killer_mike · 06-09-2008, 07:07 PM

I wouldnt be surprised if its the fuel system and carb, the fuel lines and carb look like crap. And well the truck starts every time, the spark plug wires are a mayor f-up because are not cut to length, they just installed them in a hurry i guess. I Will check on the spark plugs to see what they tell me.

Any other ideas other than the starving of fuel?

minime's 68' · 06-09-2008, 07:10 PM

I'd take a look at the distributor.

Mister laugh · 06-09-2008, 08:27 PM

I suggest that you take out your fuel sending unit, remove the sock and blow the sending unit out with a compressor. after that replace all of the rubber lines, and blow out all the hard lines. New fuel filter, and a can of Aerosol carb cleaner. If that helps maybe think about a carb rebuild. If that doesn't help the problem, it was save you from future problems at least.

killer_mike · 06-09-2008, 08:56 PM

So im supposed to have a in-tank fuel sending unit besides the mech. fuel pump? Gonna check on that. If theres too much crap messed up im just gonna replace the engine with the new one i have in the garage; wich reminds me, what is the easiest way to separate the tranny from the enigne [this will be my first engine swap] Lets not start another thread, so the forum dont look clutered plz.

santana474 · 06-09-2008, 10:49 PM

manual or auto tranny?
Auto is pretty straight forward. pull driveshaft, drain fluid, disconnect everything from tranny, remove support and crossmember, remove torque converter bolts, loosen!! tranny to engine bolts, raise tranny a little with jack, then romove all bolts, and guide tranny out. That's the short version, hope it helps

Mister laugh · 06-10-2008, 12:03 AM

Quote:

Originally Posted by killer_mike

So im supposed to have a in-tank fuel sending unit besides the mech. fuel pump? Gonna check on that. If theres too much crap messed up im just gonna replace the engine with the new one i have in the garage; wich reminds me, what is the easiest way to separate the tranny from the enigne [this will be my first engine swap] Lets not start another thread, so the forum dont look clutered plz.

The sending unit is more or less a tube that goes to the bottom on the tank. It is not a pump at all.

killer_mike · 06-10-2008, 01:23 AM

Makes sense :-)

**El Jay** · 06-10-2008, 03:04 AM

I'd go to the basics. Check the fuel filter(s).

Many, many moons ago, (oh wait, you can't see my arm describing an arc over my cranium) my son & I took an Easter week trip to AZ.
On the way back home, climbing the hill between Blythe and Chiriaco Summit, the old Jimmy wouldn't run over about 50-55 MPH
So I pulled into the General Patton Museum. We didn't have time to stop in and look at the displays, but I did change out the inline fuel filter. (I carried a couple of spares for that trip)
The Jimmy ran fine all the rest of the way home!

Just my .02.

killer_mike · 06-10-2008, 03:56 AM

Hmmm, that might be the case, former owner had the crappy one that LMC has [they have good stuff other than performance parts]

and i bet anyone he was putting 85 octane [yuck], i wouldnt put that on an lawnmover...

killer_mike · 06-16-2008, 03:15 PM

Alright, i had a Rusell filter laying around [new] and i put it on, check the sending unit, and the sock, that thing just crumbled on my hands, so i put a improvised sock. And this is the interesting stuff, i think the problem was because the primary on the carb was closing, the vacuum was closing it. So i did all that plus i secured the primary with a zip tie and the truck is good now.

killer_mike · 07-08-2008, 01:42 AM

I talked to a rep from Novak and he told me the problem most likely would be clutch chatter, about wich i started reading the Tech-One Manual TRansmission and it seems to tackle that same cause, the rep also told me that if it would be a gear problem, it would cause a catastrophy, and on the case of a synchro would be problems at shifting.

Anyone knows what kind of oil the trannie uses?

Dusty_case · 07-08-2008, 04:51 AM

Don't forget the filter in the crab I would try seafoam it works wonders

**special-K** · 07-08-2008, 07:12 AM

Is this another problem?Are you hearing chatter?I`m confused.

dan42 · 07-08-2008, 09:52 AM

Quote:

Originally Posted by Dusty_case

Don't forget the filter in the crab I would try seafoam it works wonders

Yeah, those crab filters will get you every time!

Sorry, I had to say it.

killer_mike · 07-09-2008, 02:07 AM

Lol, say it loud. And i didnt had any experience on those carbs, i think is a carter quadrajet; now i have an Edelbrock 1805 Thunder AVS, so no more isues on that but i will install another filter maybe around the section from the cab to the frame.

Quote:

Originally Posted by dan42

Yeah, those crab filters will get you every time!

Sorry, I had to say it.

06-09-2008, 06:48 PM	#1
killer_mike Big Red & Mister Blue... Join Date: Jan 2008 Location: Pat, NJ Posts: 107	67 K10, slow and go problem Hey guys. First of all understand that since i bought this truck most of the time was in the garage, and i been driving it for a couple of days. Anyways, today i went out to run some errands and on the way home the truck started to slow down, and go, slow down and go, did it for about 30 to 60 seconds, i slowed down and started slowly and it was good again but it kept doing it on 2 other ocasions, does it on any gear, except reverse. What it does is like kinda loses power but dont die, and then recovers. Im thinking maybe is dirty gas tank, z-bar problems [is a little lose] or the clutch is kaput. Any ideas? __________________ K10 1967, SM420 & Rockwell T221 C1500 1991, 305 CID, Ext Cab, Full Size bed, everything original except air cleaner.

06-09-2008, 06:55 PM	#2
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: 67 K10, slow and go problem Fuel, and ignition come to mind. Maybe a dirty fuel filter,bad pump or carb,may be starving the engine for fuel.Or if it's still running the original points system they could cause the problem. __________________ 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"

06-09-2008, 07:07 PM	#3
killer_mike Big Red & Mister Blue... Join Date: Jan 2008 Location: Pat, NJ Posts: 107	Re: 67 K10, slow and go problem I wouldnt be surprised if its the fuel system and carb, the fuel lines and carb look like crap. And well the truck starts every time, the spark plug wires are a mayor f-up because are not cut to length, they just installed them in a hurry i guess. I Will check on the spark plugs to see what they tell me. Any other ideas other than the starving of fuel? __________________ K10 1967, SM420 & Rockwell T221 C1500 1991, 305 CID, Ext Cab, Full Size bed, everything original except air cleaner. Last edited by killer_mike; 06-09-2008 at 07:09 PM.

06-09-2008, 07:10 PM	#4
minime's 68' Registered User Join Date: May 2007 Location: Utah Posts: 53	Re: 67 K10, slow and go problem I'd take a look at the distributor.

06-09-2008, 08:27 PM	#5
Mister laugh Registered User Join Date: Jun 2007 Location: Edmonton, Alberta Posts: 423	Re: 67 K10, slow and go problem I suggest that you take out your fuel sending unit, remove the sock and blow the sending unit out with a compressor. after that replace all of the rubber lines, and blow out all the hard lines. New fuel filter, and a can of Aerosol carb cleaner. If that helps maybe think about a carb rebuild. If that doesn't help the problem, it was save you from future problems at least.

06-09-2008, 08:56 PM	#6
killer_mike Big Red & Mister Blue... Join Date: Jan 2008 Location: Pat, NJ Posts: 107	Re: 67 K10, slow and go problem So im supposed to have a in-tank fuel sending unit besides the mech. fuel pump? Gonna check on that. If theres too much crap messed up im just gonna replace the engine with the new one i have in the garage; wich reminds me, what is the easiest way to separate the tranny from the enigne [this will be my first engine swap] Lets not start another thread, so the forum dont look clutered plz. __________________ K10 1967, SM420 & Rockwell T221 C1500 1991, 305 CID, Ext Cab, Full Size bed, everything original except air cleaner.

06-09-2008, 10:49 PM	#7
santana474 Registered User Join Date: Jan 2008 Location: Petal, MS Posts: 60	Re: 67 K10, slow and go problem manual or auto tranny? Auto is pretty straight forward. pull driveshaft, drain fluid, disconnect everything from tranny, remove support and crossmember, remove torque converter bolts, loosen!! tranny to engine bolts, raise tranny a little with jack, then romove all bolts, and guide tranny out. That's the short version, hope it helps __________________ 72 S/W 350/700R4!!

06-10-2008, 01:23 AM	#9
killer_mike Big Red & Mister Blue... Join Date: Jan 2008 Location: Pat, NJ Posts: 107	Re: 67 K10, slow and go problem Makes sense :-) __________________ K10 1967, SM420 & Rockwell T221 C1500 1991, 305 CID, Ext Cab, Full Size bed, everything original except air cleaner.

06-10-2008, 03:04 AM	#10
El Jay Gone to greener pastures Join Date: May 2007 Location: Gateway to the Delta Posts: 7,354	Re: 67 K10, slow and go problem I'd go to the basics. Check the fuel filter(s). Many, many moons ago, (oh wait, you can't see my arm describing an arc over my cranium) my son & I took an Easter week trip to AZ. On the way back home, climbing the hill between Blythe and Chiriaco Summit, the old Jimmy wouldn't run over about 50-55 MPH So I pulled into the General Patton Museum. We didn't have time to stop in and look at the displays, but I did change out the inline fuel filter. (I carried a couple of spares for that trip) The Jimmy ran fine all the rest of the way home! Just my .02. __________________ '69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck

06-10-2008, 03:56 AM	#11
killer_mike Big Red & Mister Blue... Join Date: Jan 2008 Location: Pat, NJ Posts: 107	Re: 67 K10, slow and go problem Hmmm, that might be the case, former owner had the crappy one that LMC has [they have good stuff other than performance parts] and i bet anyone he was putting 85 octane [yuck], i wouldnt put that on an lawnmover... __________________ K10 1967, SM420 & Rockwell T221 C1500 1991, 305 CID, Ext Cab, Full Size bed, everything original except air cleaner. Last edited by killer_mike; 06-10-2008 at 03:58 AM.

06-16-2008, 03:15 PM	#12
killer_mike Big Red & Mister Blue... Join Date: Jan 2008 Location: Pat, NJ Posts: 107	Re: 67 K10, slow and go problem Alright, i had a Rusell filter laying around [new] and i put it on, check the sending unit, and the sock, that thing just crumbled on my hands, so i put a improvised sock. And this is the interesting stuff, i think the problem was because the primary on the carb was closing, the vacuum was closing it. So i did all that plus i secured the primary with a zip tie and the truck is good now. __________________ K10 1967, SM420 & Rockwell T221 C1500 1991, 305 CID, Ext Cab, Full Size bed, everything original except air cleaner.

07-08-2008, 01:42 AM	#13
killer_mike Big Red & Mister Blue... Join Date: Jan 2008 Location: Pat, NJ Posts: 107	Re: 67 K10, slow and go problem I talked to a rep from Novak and he told me the problem most likely would be clutch chatter, about wich i started reading the Tech-One Manual TRansmission and it seems to tackle that same cause, the rep also told me that if it would be a gear problem, it would cause a catastrophy, and on the case of a synchro would be problems at shifting. Anyone knows what kind of oil the trannie uses? __________________ K10 1967, SM420 & Rockwell T221 C1500 1991, 305 CID, Ext Cab, Full Size bed, everything original except air cleaner.

07-08-2008, 04:51 AM	#14
Dusty_case Registered User Join Date: Apr 2008 Location: spokane valley wa Posts: 112	Re: 67 K10, slow and go problem Don't forget the filter in the crab I would try seafoam it works wonders __________________ 1968 c10 250/3spd

07-08-2008, 07:12 AM	#15
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,861	Re: 67 K10, slow and go problem Is this another problem?Are you hearing chatter?I`m confused. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~



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