Newbie in need of some help engine help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

efsoccer9 · 04-29-2010, 10:02 AM

Hi everyone, I am new to the board and recently purchased a 67 C10. Previous owner said he thought it jumped time. It is a 283 with a 1406 Edelbrock Carb, it is HEI not points. I have adjusted the timing and it starts, but anytime I attempt to give it gas due to idling rough, it shoots out of the carb. Cap and Distributor, rotor, spark plugs, and wires were all replaced this week. I did notice the ignition wire was screwed up, because I ran a lead line from the switch on the distributor to the battery and she turned right over. Any other suggestions on getting this old beauty running smooth?

Ole Greenie · 04-29-2010, 10:26 AM

Try a new coil....these going bad often results in backfires and horrible running. Virtually impossible to jump time.

cdowns · 04-29-2010, 12:03 PM

easiest way to tell is by use of a piston stop to determing TDC then see if the pointer and balancer line up

i've seen plenty of 40year old motors with very worn timing chains and gears jump time

Hottrucks · 04-29-2010, 12:16 PM

come on guys this is an easy one............

the original wire has a resistor in it and doesn't supply the 12V needed for the HEI..run a new wire from the fuse box to the HEI I'll will to bet it cures you issue

Ole Greenie · 04-29-2010, 02:28 PM

Agreed...potentially a good catch but this should have been done when the HEI was installed and if not done it should never have run properly since. My guess is that it did run fine after the HEI install. Ask the PO if it ran fine after the HEI install. If it did, then I would check the coil. Probably has an ancient coil. But as suggested, check TDC before replacing the coil. A jump in timing is the last thing you want to remedy on an original motor!

efsoccer9 · 05-01-2010, 12:52 PM

PO said it ran for about a week, sluggish but it ran. Gonna check the coil and wiring. He was messing with the blower motor too and I am wondering if he might have blown a fuse so I have to check that also. He had this thing tore apart and not sure what he did to what so gotta retrace his steps and check everything. I will keep you guys posted. Got title transferred and historical plates ordered today so I am ready to run this puppy! Thanks for all the help guys, really appreciate it.

junkyardjohn · 05-01-2010, 01:35 PM

Quote:

Originally Posted by Ole Greenie

Try a new coil....these going bad often results in backfires and horrible running. Virtually impossible to jump time.

EVERY COIL THAT WENT SOUTH ON ME OVER THE LAST 40 YEARS WAS A 100% FAILURE WITH NO SPARK AT ALL, & PLEASE... DON'T EVER REPETE THAT VIRTUALLY IMPOSSIBLE TO JUMP TIME COMMENT OR GIVE ANYONE THAT ADVICE EVER AGAIN. AN OLD MAN ONCE TOLD ME.. BETTER TO KEEP YOURE MOUTH SHUT ABOUT THINGS YOU NO NOTHING ABOUT & LOOKING LIKE AN IDIOT, INSTEAD OF OPENING IT & REMOVING ALL DOUBT.

JOHN

efsoccer9 · 05-01-2010, 09:27 PM

Well, it turns out it was the 12V running to the ignition. She runs like a champ, I threw some tranny fluid in it and ran her up and down the alley a few times with no issues. Brakes need bled and want to hook a tach to it tomorrow to get adjustments down, but she's running, first battle won!

04-29-2010, 10:02 AM	#1
efsoccer9 Registered User Join Date: Apr 2010 Location: Toledo, Ohio Posts: 49	Newbie in need of some help engine help Hi everyone, I am new to the board and recently purchased a 67 C10. Previous owner said he thought it jumped time. It is a 283 with a 1406 Edelbrock Carb, it is HEI not points. I have adjusted the timing and it starts, but anytime I attempt to give it gas due to idling rough, it shoots out of the carb. Cap and Distributor, rotor, spark plugs, and wires were all replaced this week. I did notice the ignition wire was screwed up, because I ran a lead line from the switch on the distributor to the battery and she turned right over. Any other suggestions on getting this old beauty running smooth?

04-29-2010, 10:26 AM	#2
Ole Greenie Registered User Join Date: Apr 2010 Location: Hagerstown, MD Posts: 246	Re: Newbie in need of some help engine help Try a new coil....these going bad often results in backfires and horrible running. Virtually impossible to jump time. __________________ John Paap Ole Greenie Hagerstown, MD My Mistress 70 CST Short/Step LS 5.3/4L65E New motor install Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=667773

04-29-2010, 12:03 PM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Newbie in need of some help engine help easiest way to tell is by use of a piston stop to determing TDC then see if the pointer and balancer line up i've seen plenty of 40year old motors with very worn timing chains and gears jump time __________________ 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 Last edited by cdowns; 05-01-2010 at 02:50 PM.

04-29-2010, 12:16 PM	#4
Hottrucks Redefining LowBudget Join Date: Mar 2009 Location: lebanon Cow Hampshire Posts: 4,538	Re: Newbie in need of some help engine help come on guys this is an easy one............ the original wire has a resistor in it and doesn't supply the 12V needed for the HEI..run a new wire from the fuse box to the HEI I'll will to bet it cures you issue __________________ 1970 C10 CST fleetside 472 ....big dreams little cash... http://67-72chevytrucks.com/vboard/s...d.php?t=335721 SunShine Syndicate.. Mikes Sandwich Fair Run OCT 8th 2011 http://www.thesandwichfair.com/html/...auto_show.html

04-29-2010, 02:28 PM	#5
Ole Greenie Registered User Join Date: Apr 2010 Location: Hagerstown, MD Posts: 246	Re: Newbie in need of some help engine help Agreed...potentially a good catch but this should have been done when the HEI was installed and if not done it should never have run properly since. My guess is that it did run fine after the HEI install. Ask the PO if it ran fine after the HEI install. If it did, then I would check the coil. Probably has an ancient coil. But as suggested, check TDC before replacing the coil. A jump in timing is the last thing you want to remedy on an original motor! __________________ John Paap Ole Greenie Hagerstown, MD My Mistress 70 CST Short/Step LS 5.3/4L65E New motor install Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=667773

05-01-2010, 12:52 PM	#6
efsoccer9 Registered User Join Date: Apr 2010 Location: Toledo, Ohio Posts: 49	Re: Newbie in need of some help engine help PO said it ran for about a week, sluggish but it ran. Gonna check the coil and wiring. He was messing with the blower motor too and I am wondering if he might have blown a fuse so I have to check that also. He had this thing tore apart and not sure what he did to what so gotta retrace his steps and check everything. I will keep you guys posted. Got title transferred and historical plates ordered today so I am ready to run this puppy! Thanks for all the help guys, really appreciate it.

05-01-2010, 09:27 PM	#8
efsoccer9 Registered User Join Date: Apr 2010 Location: Toledo, Ohio Posts: 49	Re: Newbie in need of some help engine help Well, it turns out it was the 12V running to the ignition. She runs like a champ, I threw some tranny fluid in it and ran her up and down the alley a few times with no issues. Brakes need bled and want to hook a tach to it tomorrow to get adjustments down, but she's running, first battle won!



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