timing problem (HELP) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mtb_will_03 · 01-27-2007, 11:31 PM

I chek the timing everything is fine at 36*

truck runs for a bit and starts runing like crap, chek the timing and its way out of wack......

its like some how changing its own timing.....

**WorkinLonghorn** · 01-27-2007, 11:40 PM

I' check the centrifugal advance weights and make sure the little mechanism is lubed.If they are sticking you will get that (what you describe).

**WorkinLonghorn** · 01-27-2007, 11:42 PM

It's easy,just take out the points and look down into the distrib.

hvychve · 01-27-2007, 11:57 PM

if your breaker plate isnt hanging up either through the vacuum advance arm binding , or the weights are swinging and causing the shaft to stayed advanced , the best way to check is take rotor off and verify the weights are completely closed, or removed distributor and hold the gear while twisting to verify that it returns smoothly, if thats all good, the only other thing it could be is timing chain/gears, either gobs of slack or jumping back and forth.

mtb_will_03 · 01-28-2007, 12:31 AM

Thanks for the info, ill chek the distributor in the morning.

wheels67 · 01-28-2007, 12:33 AM

My hunch is a loose timing chain or worn distributor gears.

mtb_will_03 · 01-28-2007, 12:40 AM

Everything on the 383 is only 2 months old.

wheels67 · 01-28-2007, 12:44 AM

Quote:

Originally Posted by mtb_will_03

Everything on the 383 is only 2 months old.

Did it run before this (During the 3 months)? was it rebuilt? Could take that long to come loose.

BTW One time i set my timing and forgot to tighten down the distributor bolt cuz i was in a hurry.........just sayin is all.lol

mtb_will_03 · 02-03-2007, 12:12 PM

another few questions i have, what should the timing be at idle ?

also for setting up a 700r4 tranny i was told to hold the carb wide open and set the tv cable tight when wide open.

byrd · 02-03-2007, 12:18 PM

idle timing with vac advacned unhooked should be between 4-10 bftdc
and for the 700 yes that is good enough to drive straight to your local tranny shop and have them set it up using a pressure gauge. It most likely will last long at all if you do not let them set it up, just my .02...Randy

**VetteVet** · 02-03-2007, 12:59 PM

Convert to HEI and forget timing issues.

Go here for TV cable assistance.
http://www.tvmadeez.com/article/index.html

01-27-2007, 11:31 PM	#1
mtb_will_03 Registered User Join Date: Aug 2006 Location: Langley, BC Canada Posts: 114	timing problem (HELP) I chek the timing everything is fine at 36* truck runs for a bit and starts runing like crap, chek the timing and its way out of wack...... its like some how changing its own timing..... Last edited by mtb_will_03; 01-27-2007 at 11:34 PM.

01-27-2007, 11:40 PM	#2
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,861	Re: timming problem (HELP) I' check the centrifugal advance weights and make sure the little mechanism is lubed.If they are sticking you will get that (what you describe). __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent.

01-27-2007, 11:42 PM	#3
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,861	Re: timming problem (HELP) It's easy,just take out the points and look down into the distrib. __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent.

01-27-2007, 11:57 PM	#4
hvychve To The Levy Join Date: Jan 2007 Location: california Posts: 391	Re: timming problem (HELP) if your breaker plate isnt hanging up either through the vacuum advance arm binding , or the weights are swinging and causing the shaft to stayed advanced , the best way to check is take rotor off and verify the weights are completely closed, or removed distributor and hold the gear while twisting to verify that it returns smoothly, if thats all good, the only other thing it could be is timing chain/gears, either gobs of slack or jumping back and forth.

01-28-2007, 12:31 AM	#5
mtb_will_03 Registered User Join Date: Aug 2006 Location: Langley, BC Canada Posts: 114	Re: timing problem (HELP) Thanks for the info, ill chek the distributor in the morning.

01-28-2007, 12:33 AM	#6
wheels67 Registered User Join Date: Dec 2006 Location: southern Utah Posts: 103	Re: timing problem (HELP) My hunch is a loose timing chain or worn distributor gears.

01-28-2007, 12:40 AM	#7
mtb_will_03 Registered User Join Date: Aug 2006 Location: Langley, BC Canada Posts: 114	Re: timing problem (HELP) Everything on the 383 is only 2 months old.

02-03-2007, 12:12 PM	#9
mtb_will_03 Registered User Join Date: Aug 2006 Location: Langley, BC Canada Posts: 114	Re: timing problem (HELP) another few questions i have, what should the timing be at idle ? also for setting up a 700r4 tranny i was told to hold the carb wide open and set the tv cable tight when wide open.

02-03-2007, 12:59 PM	#11
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,709	Re: timing problem (HELP) Convert to HEI and forget timing issues. Go here for TV cable assistance. http://www.tvmadeez.com/article/index.html __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.



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