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#1 |
Registered User
Join Date: Sep 2006
Location: Midlothian, VA
Posts: 50
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Truck running funny
71 GMC 350 - Finally got my mechanic to fix the brakes and pack a wheel bearing. So with the weather being nice, I decided to go cruzing while completing some errands. Since I'm used to driving a 93 GMC Vanudra, I think I may have pushed it too hard. Speedometer read 80, GPS said 70. When I got off the turnpike, IT started acting funny, cutting off at the traffic lights. Then when I got to my destination, it cuts off. I restart, idles fine, put in drive, and cuts off again, start it again, put in drive cuts off again. I mamange to get it into a parking space, go do my business come back 20 minutes later, and It's running fine. Any thoughts, ideas?
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Quenton Lee Midlothian Electric Comapny Inc. Electrical Contractors Since 1965 |
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#2 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: Truck running funny
Does it sputter or just die? While it stay running if you give it gas while holding the brake and shifting? Is it HEI or points?
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"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#3 |
GEARHEAD
Join Date: Jan 2007
Location: CENTRAL,PA
Posts: 2,284
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Re: Truck running funny
Have your local parts store check the control modue for ya. They do funny things some times. I know it should not have any thing to do with the tranny but it controls many aspects of the ignition at different engine speeds. So if your idle drops when you put your truck in gear it could be the moduel. If you are not running an HEI I have not a clue as I have verry little experience with points. RJ22
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#4 |
New Member
Join Date: Apr 2006
Location: west virginia
Posts: 29
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Re: Truck running funny
Just a wild guess,maybe vapor locked? Check your fuel line and see if its close to a heat source.
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#5 |
Registered User
Join Date: Oct 2006
Location: Louisville Ky
Posts: 179
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Re: Truck running funny
I've heard of torque converters doing this before maybe you should check fluid level and make sure your trans fluid is not low or overheating Good Luck though
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1971 c10 350ci long bed fleet side ![]() |
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#6 | |
Senior Member
Join Date: Mar 2007
Location: VANCOUVER ISLAND, B.C., Canada
Posts: 1,602
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Re: Truck running funny
Quote:
Does your tranny draw vacuum off your intake??? If so could be a vacuum leak. Just a guess. esll.
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Tomorrow is for doing today's stuff. ![]() ************************************* This truck has just the right amount of energy for me! ![]() Author: Warren Lake .... (member) |
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#7 |
Registered User
Join Date: Jun 2002
Location: central pa
Posts: 1,525
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Re: Truck running funny
I would check the mechanical advance in the distributor sounds like it stuck full advance and then released after it stopped for awhile.
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72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne |
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#8 |
Too many projects
Join Date: Mar 2004
Location: Fargo, ND land of the flat hills
Posts: 1,147
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Re: Truck running funny
Check the fuel line and it's proximity to heat sources. Mine did the exact same thing a few years back, had to reroute the fuel line and filter away from the rad hoses.
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Andrew 84 GMC C1500 SWB 6.2 Diesel/700R4/3.42 "Grandpa's odd duck" Last edited by lowrollin70gmc; 03-25-2007 at 01:14 AM. Reason: spalin' |
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#9 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: Truck running funny
Definately operating temp related.I suspect carburation or torque converter.Could be vacuum or fuel/air.Doesn`t sound major.
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"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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