80 GMC intermittant rough idle - The 1947 - Present Chevrolet & GMC Truck Message Board Network

marvxyz · 01-13-2005, 09:53 PM

Hello fellows-I have a problem with my 6 cyl.auto 80 GMC. When Driving and pulling to a stop sign I have this intermittant rough idle while in gear. Sometimes when I stop she runs great and then sometimes it's shake rattle and roll. Also sometimes when turning around on a slope the truck will stall. I installed new plug wires, plugs distributer cap, rotor, air filter. Should I be looking at carburator, vacuum lines or other?

Russell · 01-13-2005, 10:06 PM

Sounds like carb float issues to me, as far as stalling going around corners

My truck does the same thing with the intermittant rough idle, I've changed out the dizzy completely, and it still does it sometimes...

marvxyz · 01-13-2005, 10:28 PM

Thanks Russell, I kinda thought that would be it.
By the way what's the weather like where you're at. I live in Pgh, Pa. and we've had some decent 40-60 degree weather the last two weeks. we've had some rain though.

magnethead · 01-13-2005, 10:40 PM

as for the rough ride, it sounds like either you have a spring bushing out of whack somewhere, a bad shock, or [maybe] a loose or pulsating brake caliper.

marvxyz · 01-13-2005, 10:51 PM

Dear magnethead, The idle is rough sometimes. Actually the truck rides smooth --as good as some heavier cars. Thanks for trying to help me, I appreciate it.

marvxyz

Russell · 01-13-2005, 11:20 PM

Its extremely cold up here, somewhere about -30 F (-35 C) :p

01-13-2005, 09:53 PM	#1
marvxyz Registered User Join Date: Jan 2005 Location: Pittsburgh, Pa. Posts: 27	80 GMC intermittant rough idle Hello fellows-I have a problem with my 6 cyl.auto 80 GMC. When Driving and pulling to a stop sign I have this intermittant rough idle while in gear. Sometimes when I stop she runs great and then sometimes it's shake rattle and roll. Also sometimes when turning around on a slope the truck will stall. I installed new plug wires, plugs distributer cap, rotor, air filter. Should I be looking at carburator, vacuum lines or other?

01-13-2005, 10:06 PM	#2
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Sounds like carb float issues to me, as far as stalling going around corners My truck does the same thing with the intermittant rough idle, I've changed out the dizzy completely, and it still does it sometimes... __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

01-13-2005, 11:20 PM	#6
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Its extremely cold up here, somewhere about -30 F (-35 C) :p __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

01-13-2005, 10:28 PM	#3
marvxyz Registered User Join Date: Jan 2005 Location: Pittsburgh, Pa. Posts: 27	Thanks Russell, I kinda thought that would be it. By the way what's the weather like where you're at. I live in Pgh, Pa. and we've had some decent 40-60 degree weather the last two weeks. we've had some rain though.

01-13-2005, 10:40 PM	#4
magnethead 7000 #'s of american IRON Join Date: Dec 2004 Location: north tx Posts: 883	as for the rough ride, it sounds like either you have a spring bushing out of whack somewhere, a bad shock, or [maybe] a loose or pulsating brake caliper.

01-13-2005, 10:51 PM	#5
marvxyz Registered User Join Date: Jan 2005 Location: Pittsburgh, Pa. Posts: 27	Dear magnethead, The idle is rough sometimes. Actually the truck rides smooth --as good as some heavier cars. Thanks for trying to help me, I appreciate it. marvxyz



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.