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Author Topic: 79 350 timing anomaly  (Read 5921 times)

Offline Bwn_us

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79 350 timing anomaly
« on: February 23, 2017, 06:08:33 PM »
I am restoring a 1979 C10 with a 350 4bl quadrajet. The timing has been off since I got it. Tried setting to timing line... When on timing line spit and sputtering. Upgraded distributor, same thing. Broke open and replaced timing gears(which the timing marks where on by the way just a tad bit of slacking chain) same thing. Harmonic balancer looks fine..... I'm lost.
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Offline Captkaos

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Re: 79 350 timing anomaly
« Reply #1 on: February 23, 2017, 07:03:48 PM »
Find TDC and check the marks on the balancer.  They have been known to slip.
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Offline Irish_Alley

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Re: 79 350 timing anomaly
« Reply #2 on: February 24, 2017, 07:22:02 AM »
Quote from: Captkaos on February 23, 2017, 07:03:48 PM
Find TDC and check the marks on the balancer.  They have been known to slip.

this

if youre not sure where to start when it comes to timing its best to start at the beginning remove all your plug wires and find tdc put wires on then double check your wires


http://forum.73-87chevytrucks.com/smforum/index.php?topic=32085.0
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Offline 78BIG-TEN

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Re: 79 350 timing anomaly
« Reply #3 on: February 24, 2017, 03:19:47 PM »
Some timing tabs were off to the side by p\s pump and some were staight up where you had to look behind water
punp.
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Offline Bwn_us

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Re: 79 350 timing anomaly
« Reply #4 on: March 11, 2017, 08:15:15 PM »
Thanks for the suggestions. I did timing job done . and new water pump while I was in it, adjusted valves,  and new wires..... Runs better but when 4 barrel kicks in its like a horrible miss. Checked plug colors and they look great. The plugs are only 6 months old but I guess I'm gonna change them. 2 plugs on the right bank and 1 on left blank are flashing blue, not exactly arcing but flashing.
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Offline Bwn_us

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Re: 79 350 timing anomaly
« Reply #5 on: March 16, 2017, 03:49:08 PM »
So I changed plugs.... Added an additional ground.(there was only one ground strap to passenger side head so I put 00 gauge wire to frame from driver side head) still won't take fuel when 4 barrel opens and even with new plugs and wire still have a plug on each side flashing not arcing like bad plug wires but flashing
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Offline roundhouse

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Re: 79 350 timing anomaly
« Reply #6 on: March 21, 2017, 03:32:05 AM »
Set the timing by a vacuum gauge or just by ear
Drive it hard up a hill
Advance the timing 2 degrees
Run it hard up a hill again
Keep doing that till it starts knocking at full throttle up hill
Then retard timing 2 or 3 degrees


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Offline gunrac

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Re: 79 350 timing anomaly
« Reply #7 on: March 21, 2017, 07:44:33 AM »
Quote from: roundhouse on March 21, 2017, 03:32:05 AM
Set the timing by a vacuum gauge or just by ear
Drive it hard up a hill
Advance the timing 2 degrees
Run it hard up a hill again
Keep doing that till it starts knocking at full throttle up hill
Then retard timing 2 or 3 degrees


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Never heard that before...........but kinda makes since.
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Offline gunrac

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Re: 79 350 timing anomaly
« Reply #8 on: March 21, 2017, 07:52:33 AM »
More I think about this, I have done it similarly, I just didn't have a hill.....lol
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Offline carlnelson

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Re: 79 350 timing anomaly
« Reply #9 on: March 21, 2017, 01:46:07 PM »
Sounds like all the times it ended up being the distrib cap, would work fine low speeds but upon accel crap out... my cap looked fine but replaced it and miracle! :-/


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