72 chevy c-10 ran before an oil change - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dagwood · 06-30-2010, 01:26 AM

hello, i have a 72 c-10 with a 250 c.i. engine with a 4 speed manual transmission. the other day i went to change the engine oil, and it ran fine when i pulled it up to in front od the garage. but afterwards, the truck would not restart. i put a volt meter on the coil and recieved a 0.0 reading. Even when i tried to jump start it off the starter, the engine would only turn over.
So i was wondering, could the points and condensor gone bad, just that quickly? may i ask for your ideas of what could have happened to it?
thank you for your time

QKENUF4U · 06-30-2010, 01:45 AM

if the coil had NO VOLTS then go backwards from there.... find out where the power stops and youve found your bad part...

cdowns · 06-30-2010, 05:38 AM

i'd clean all 4ends of the battery cables and reinstall them tightly bright shiny metal to bright shiny metal

rsavage · 06-30-2010, 06:34 AM

It is easy enough to pull the cap and check to see if the points are opening and set correctly. Did you leave the key on for awhile? You can weld the points together if they are closed and you leave the key on. Check to make sure you didn't inadvertently pull any wires off the coil while working on the oil change. Were you working on anything else while changing the oil?

**70STOVEBOLT** · 06-30-2010, 12:53 PM

Make sure the ground cable on the battery is grounded to the block. Mine was grounded to the core support since I've owned it (9 yrs), and recently it has been hard to start, would just turn over, but would not fire. I moved the ground to the block, and now it turns maybe 2 revolutions and fires immediately.

raycow · 07-01-2010, 02:49 PM

If you can crank the engine from the ignition switch, you know the battery and all wiring from the battery to the switch are good. As a test, you can connect a temporary wire from the battery (+) to the coil (+). If the engine starts now, you know the ignition system is good, and the problem is between the switch and the coil (+). Check the engine harness firewall connector first, as it can get loose or corroded.

Do not leave the temporary wire connected any longer than necessary to see if the engine will run, as it is bypassing the resistance wire in the stock harness, which can cause the points to burn.

Ray

dagwood · 07-02-2010, 01:24 AM

i did manage to get it refired after adjusting the points. but it was acting like it only had half power. So i tried a new set of points and condensor, which did not work at all. i scrapped the old points and kept the new condensor. The truck did manage to start. it acted like it was a it running on 4. i did find a bad vacuum leak at the carburator along with a gas leak.

06-30-2010, 01:26 AM	#1
dagwood Registered User Join Date: Jun 2010 Location: fort bragg, ca Posts: 16	72 chevy c-10 ran before an oil change hello, i have a 72 c-10 with a 250 c.i. engine with a 4 speed manual transmission. the other day i went to change the engine oil, and it ran fine when i pulled it up to in front od the garage. but afterwards, the truck would not restart. i put a volt meter on the coil and recieved a 0.0 reading. Even when i tried to jump start it off the starter, the engine would only turn over. So i was wondering, could the points and condensor gone bad, just that quickly? may i ask for your ideas of what could have happened to it? thank you for your time

06-30-2010, 01:45 AM	#2
QKENUF4U Senior Member Join Date: Jan 2005 Location: SUNNY WARM BIKE RIDING COTTONWOOD ARIZONA Posts: 2,097	Re: 72 chevy c-10 ran before an oil change if the coil had NO VOLTS then go backwards from there.... find out where the power stops and youve found your bad part... Last edited by QKENUF4U; 06-30-2010 at 01:46 AM.

06-30-2010, 05:38 AM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: 72 chevy c-10 ran before an oil change i'd clean all 4ends of the battery cables and reinstall them tightly bright shiny metal to bright shiny metal __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

06-30-2010, 06:34 AM	#4
rsavage Registered User Join Date: Aug 2009 Location: Alden NY Posts: 2,705	Re: 72 chevy c-10 ran before an oil change It is easy enough to pull the cap and check to see if the points are opening and set correctly. Did you leave the key on for awhile? You can weld the points together if they are closed and you leave the key on. Check to make sure you didn't inadvertently pull any wires off the coil while working on the oil change. Were you working on anything else while changing the oil? __________________ 1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7

06-30-2010, 12:53 PM	#5
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,358	Re: 72 chevy c-10 ran before an oil change Make sure the ground cable on the battery is grounded to the block. Mine was grounded to the core support since I've owned it (9 yrs), and recently it has been hard to start, would just turn over, but would not fire. I moved the ground to the block, and now it turns maybe 2 revolutions and fires immediately. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Sliding Rear Window Power Windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

07-01-2010, 02:49 PM	#6
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: 72 chevy c-10 ran before an oil change If you can crank the engine from the ignition switch, you know the battery and all wiring from the battery to the switch are good. As a test, you can connect a temporary wire from the battery (+) to the coil (+). If the engine starts now, you know the ignition system is good, and the problem is between the switch and the coil (+). Check the engine harness firewall connector first, as it can get loose or corroded. Do not leave the temporary wire connected any longer than necessary to see if the engine will run, as it is bypassing the resistance wire in the stock harness, which can cause the points to burn. Ray

07-02-2010, 01:24 AM	#7
dagwood Registered User Join Date: Jun 2010 Location: fort bragg, ca Posts: 16	Re: 72 chevy c-10 ran before an oil change i did manage to get it refired after adjusting the points. but it was acting like it only had half power. So i tried a new set of points and condensor, which did not work at all. i scrapped the old points and kept the new condensor. The truck did manage to start. it acted like it was a it running on 4. i did find a bad vacuum leak at the carburator along with a gas leak.



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