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#1 |
printing is my trade
Join Date: May 2009
Location: San Antonio, Texas
Posts: 349
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Truck starts right up but...
Ok so when I turn the key, the truck starts right up.
But in less than 10 seconds it dies out unless I give it some gas. But as soon as I stop reving it, it will die out again quickly. Anybody know what's my problem? I have only had the truck for about a week but, I know that the transmission has a bad leak and it appears that there is a seal for the carb that is leaking as well. Could either of these things be the problem?
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Jojo's '70 stepside build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=344184 |
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#2 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Truck starts right up but...
Usually if it starts but doesn't continue running is caused by running out of fuel. Either leaking, clogged filters, float adjustment or not enough fuel going into the carb.
I'd start by making sure your filters are not clogged and then check to make sure the fuel pump is giving the carb enough fuel. Disconnect the line going to the carb insert it into a plastic container and have someone crank the engine with the distributor disconnected. There should be a strong pulsing stream of fuel coming from the tank. If all that looks good, then you need to check the carbs float adjustment and insuring it's clean inside. Lots of years can cause gunk to build up inside. |
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#3 |
Registered User
Join Date: Oct 2002
Location: S.W. Michigan
Posts: 403
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Re: Truck starts right up but...
possibly water in the gas. I might try running a can of dry gas through it.
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Good Judgment comes from experience. Most experience comes from bad judgment. |
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#4 |
printing is my trade
Join Date: May 2009
Location: San Antonio, Texas
Posts: 349
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Re: Truck starts right up but...
Some follow up,
I looked at the fuel filters (there's a big one inline between the fuel pump and the carb, and the one inside the carb) both were real bad. I guess there's 2 for a reason. Replacing them fixed the problem. Tomorrow I'll see about the seal on the carb that's leaking.
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Jojo's '70 stepside build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=344184 |
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#5 | |
The Red Menace
Join Date: Feb 2009
Location: Roseburg, OR
Posts: 577
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Re: Truck starts right up but...
Quote:
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1971 Custom 10 - 350/350TH - Pwr steering, gauges, Chrome front bumper, Chrome hubcaps, Door edge guards, HD rear springs (current) 1968 C-20 Custom Camper - 350/350TH (orig 327), Pwr steering & brakes, gauges w/tach (former) 1968 C-20 - 307/3sp column (Dad's when I was a kid) "Driving is like coloring. Things get messy if you can't stay inside the lines." |
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#6 |
Gone to greener pastures
![]() Join Date: May 2007
Location: Gateway to the Delta
Posts: 7,354
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Re: Truck starts right up but...
My '72 sat for quite awhile before I bought.
It wasn't quite as bad as yours sounds, but I'd change the steel inline filter and it would run fine for a couple of day & then start to act up. I took the inline filter off and turned it around backwards just to back flush it into a clear container. I couldn't believe the crud that came out of it.....installed another new filter. I started adding Sea Foam at each fill up, for a couple of weeks, to clean stuff out and I tossed a couple of inline filters in the glove box with a cheap pair of pliers for the spring clamps. Eventually the the filter changes became more infrequent and it's been doing okay for probably 1 1/2 years now.
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'69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck |
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#7 |
Registered User
Join Date: Jun 2008
Location: gardena california
Posts: 5
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Re: Truck starts right up but...
you have a vaccum leak somewhere, find that first so it will idle then fix whatever else is wrong with it
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