| Re: [GMCnet] Hello from Colorado again.... [message #318125 is a reply to message #318112] |
Mon, 29 May 2017 08:33  |
jessfarr
Messages: 100
Registered: August 2004
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This may have nothing to do with and/or about anything involving your problem; but, I had exactly the same problem with a '78. The simple solution, once someone suggested it to me was removing the carb inlet filter. All the pressure and volume meant nothing when the fuel stopped at the carb inlet. If you have the about an inch and a quarter long inlet fitting, it has a small filter in it. New fuel and old rubber hose coats it with black rubber. Of course, tank condensation can also paint it with rust.
jesse farr, soddy daisy TN
'74 canyonlands, 26, '76 ??, 26, & '78 Curtis Classic, 28
Original message
From: A.
To: gmclist@list.gmcnet.org;
Dated: 5/28/2017 8:33:34 PM
Subject: Re: [GMCnet] Hello from Colorado again....
thorndike wrote on Sun, 28 May 2017 19:18
> After recovering from a nearly 2 foot snowfall a week ago, I am finally able to get back to the coach to try and get it up the hill to my new
> place. As some of you may recall, my issues started while on the highway, I lost power and was able to limp along at 13 mph until I reached my home
> at the time.
> I have discussed this with several of you and as a result have replaced the fuel filter, and ignition module and coil. It appears I have healthy
> flow of fuel to the carb as I have robust flows of fuel entering the carb when activating the accelerator.
>
> I installed the ignition module and coil today but no luck. It still ran quite rough and had no power going up a small incline. I let it idle
> for a while to burn as much of the old gas off as possible and will take several cans of fresh over tomorrow to try.
>
> Could this be as simple as a timing issue? It has been years since I had to adjust the timing on any vehicle, the last was a '79 Toyota, and I am
> finding it hard to believe that the timing would go out in the middle of the highway. But I am game to try anything now as we really want to use
> the coach.
>
> Is there a simple guide available to adjust the timing? Is this a one person job, or do I have to enlist help? I am at 8400 feet so is there a
> recommended + or - TDC I should be aiming for?
>
> I wish I were more of an 'engine' guy!
Kind of wondering if your timing chain slipped a tooth.
It wouldn't idle for poop with a bad vacuum leak.
You say it is getting plenty of gas.
It fires, so it is getting spark. The distributor wouldn't have slipped if the bolt was tight (is it?). Cracked distributor cap (you could see the
fireworks in the dark)? Bad coil (sorry, I don't know if HEI has a coil or what)? I saw a car act like that with the top of the coil housing cracked.
It was sparking between the spark output connector and ground. But it barely idled.
Unlikely that it spontaneously lost compression (unless it ran out of oil, but I think you would hear a knock before the compression went away).
All I got left is a mismatch between valves opening/closing and piston TDC (timing chain).
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"Every day I become more convinced that I am the only person left on the planet that recognizes nonsense for what it is."
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jesse farr, soddy tn USA '74 Canyonlands 260
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