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Author Topic: timing without a timing light*  (Read 28506 times)

Offline Grim 82

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Re: timing without a timing light*
« Reply #30 on: December 09, 2010, 07:03:59 pm »
Your fuel line is completely hashed.
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Offline txchainsawgogi

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Re: timing without a timing light*
« Reply #31 on: December 09, 2010, 07:10:50 pm »
I need to change it I know! Old owner decided it would be ok to remove the fuel filter, and bend the line while he was at it.
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Offline TexasRed

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Re: timing without a timing light*
« Reply #32 on: December 09, 2010, 07:36:28 pm »
First, that air cleaner should never be sold.

Is it just me or is that choke pulloff hooked up to the EGR vacuum port on the carb?
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Offline txchainsawgogi

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Re: timing without a timing light*
« Reply #33 on: December 09, 2010, 08:02:05 pm »
Haha its the only filter I had in storage. The truck didn't come with the original  :-X
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Offline txchainsawgogi

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Re: timing without a timing light*
« Reply #34 on: December 09, 2010, 09:07:51 pm »
I've been looking for photos for proper routing and can't find anything. Help!
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Offline TexasRed

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Re: timing without a timing light*
« Reply #35 on: December 09, 2010, 10:03:56 pm »
http://forum.73-87chevytrucks.com/smforum/index.php?topic=18126.0

What's the year of your truck and what trans and what other emissions equipment again?
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Offline topp

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Re: timing without a timing light*
« Reply #36 on: December 09, 2010, 10:17:58 pm »
Just a few notes-

1- those see thru caps are crap.  I'd junk it.
2- You are trying to get a vehicle to run right with a SERIOUS restriction in the fuel supply.  I'd fix that to
3- Then I'd find an emissions diagram online, and re run all the hoses I need to.
4- Then I'd time it.

Anything outside of that order and that list, is just asking for issues when trying to get an engine to run properly.
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Offline txchainsawgogi

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Re: timing without a timing light*
« Reply #37 on: December 09, 2010, 10:19:43 pm »
1978 350 5.7, no emissions. Auto trans. Previous owner hacked all the emissions stuff out and seems they put hoses back willy nilly.
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Offline TandocTools

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Re: timing without a timing light*
« Reply #38 on: December 10, 2010, 07:46:51 am »
I'd fix the fuel line first, too.
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Offline txchainsawgogi

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Re: timing without a timing light*
« Reply #39 on: December 10, 2010, 02:29:31 pm »
I'm replacing it when I replace the rochester later this month. How should I have my hoses routed though? I see those charts but what if I have no emissions components hooked up?
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Offline Grim 82

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Re: timing without a timing light*
« Reply #40 on: December 10, 2010, 03:00:12 pm »
If it was mine the very first thing I would do is pull all of those clear lines and caps off and throw them away. Then I would replace the fuel line and remove the EGR valve if there was one and put a plate over it. Then I would run full manifold vacuum to the PCV, brake booster, and HVAC reserve cannister, and a timed vacuum to the distributor. Whatever vacuum you have for the choke pulloff, etc should be short little lines that go right from the carb to it. Any left over ports on the carb would be capped. That's what I run on mine, and it's simple and clean.

edit: and full manifold vacuum to your trans if you have a modulator, and your low vacuum switch if you have a lock up converter
« Last Edit: December 10, 2010, 03:01:46 pm by Grim 82 »
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Offline txchainsawgogi

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Re: timing without a timing light*
« Reply #41 on: December 10, 2010, 03:40:38 pm »
So do I need to use that three prong thing that screws into the thermostat housing? I'm mainly confused by all of this because I don't know the names of everything.
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Offline Grim 82

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Re: timing without a timing light*
« Reply #42 on: December 10, 2010, 04:20:02 pm »
It's a thermal vacuum switch, and if your not running any emissions control you don't need it.
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Offline Psycho71

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Re: timing without a timing light*
« Reply #43 on: December 10, 2010, 04:22:05 pm »
As it is right now, I don't see where you need that vacuum switch on the t-stat housing at all. Unless you have something that's vacuum operated and don't want it operating until the engine warms up. Certainly not needed if all the other emissions stuff is gone.

I too would get rid of the clear lines and use real vacuum line.

If the fuel line still flows, it's aint the end of the world, but should be replaced when you get a chance. Unless you experience the motor starving on the top end, it's probably flowing enough to keep the bowl on the carb full.

as for that air cleaner...if your truck ever burps enough fuel out of the carb to soak into that element, it can/will start a fire under the hood of your truck. That's why no-one likes them. they have caused many a fire where it could have been avoid by running a more conventional air cleaner.

Grim82 had a good post on where to locate all the vacuum lines you need for it to function.
« Last Edit: December 10, 2010, 04:24:42 pm by Psycho71 »
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Offline txchainsawgogi

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Re: timing without a timing light*
« Reply #44 on: December 10, 2010, 05:19:58 pm »
Yeah I don't care for the clear lines, but its all I had...same with the orange one. Its all getting replaced next paycheck.

So the vacuum advance should be hooked to the carb and not the t-stat switch? Viewing the emissions diagram is confusing since all mine is gone. Can someone with a similar set up post a photo? Id really appreciate it. I've already learned a lot about these lines :/
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