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Author Topic: 78 c15 5.7l starting problems  (Read 9922 times)

Offline VileZambonie

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Re: 78 c15 5.7l starting problems
« Reply #15 on: August 18, 2014, 08:41:40 pm »
If you are pumping the throttle you won't see any fuel spray. After you've discharged what's in there you won't get any more fuel until you replenish it. Nevertheless back up:

When it won't start, give it a shot of starting fluid. If it fires up you know the problem is fuel related. If not check for spark.
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Offline Ben_Greenberg

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Re: 78 c15 5.7l starting problems
« Reply #16 on: August 18, 2014, 10:01:01 pm »
Spark should be good unless the distributor is shot. The plugs and wires are brand new. I will try some starting fluid.
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Offline Ben_Greenberg

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Re: 78 c15 5.7l starting problems
« Reply #17 on: August 19, 2014, 07:33:27 pm »
Alrighty! So I tried the starting fluid and it fired right up. Didn't stay started ie. Wouldnt idle, but after doing it again and pumping the gas the truck fired right up. Am I looking at fuel pump issues?

As always, any and all help is appreciated.  You guys are awesome!
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Offline Ben_Greenberg

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Re: 78 c15 5.7l starting problems
« Reply #18 on: August 24, 2014, 01:30:02 pm »
Its time to try the fuel pump. After todays little project of replacing that and belts we will see how the truck runs. Fingers crossed!
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Offline Stewart G Griffin

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Re: 78 c15 5.7l starting problems
« Reply #19 on: August 24, 2014, 07:12:11 pm »
The other thing i don't like to see is that there is a rubber line running from fuel pump to carb.  Probably not real safe.

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Offline Ben_Greenberg

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Re: 78 c15 5.7l starting problems
« Reply #20 on: August 24, 2014, 07:45:41 pm »
Alright! So far so good! After installing the new pump, pushing the throttle down a few times to prime it all up and the truck fired right up! I will keep things updated. Thanks everybody!
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Offline Ben_Greenberg

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Re: 78 c15 5.7l starting problems
« Reply #21 on: August 28, 2014, 08:09:29 am »
Well... the problems continue. Hesistant start, once started if I shift into reverse or drive too soon after starting stalls out and dies. Any thoughts? At this point I have replaced the fuel pump, plugs and wires, fuel filter, belts (not really associated) and had my regular mechanic time it by ear as the marker is gone and the harmonic balancer... doesnt appear to have any marks on it.
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Offline Stewart G Griffin

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Re: 78 c15 5.7l starting problems
« Reply #22 on: August 28, 2014, 08:43:37 am »
Choke.
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Offline Ben_Greenberg

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Re: 78 c15 5.7l starting problems
« Reply #23 on: August 28, 2014, 01:32:12 pm »
I will take a look this evening. Thanks Stewart!
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Offline 78BIG-TEN

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Re: 78 c15 5.7l starting problems
« Reply #24 on: August 28, 2014, 02:24:21 pm »
Yep sounds like it needs more choke
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Offline Ben_Greenberg

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Re: 78 c15 5.7l starting problems
« Reply #25 on: August 28, 2014, 08:44:00 pm »

Quote from: 78BIG-TEN on August 28, 2014, 02:24:21 pm
Yep sounds like it needs more choke
does that mean that the choke needs to be closed tighter when first starting? Or do I need it to be more open when starting?
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Offline 78BIG-TEN

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Re: 78 c15 5.7l starting problems
« Reply #26 on: August 29, 2014, 08:52:36 am »
closed,open throttle 1 time when cold and choke should set closed with some spring tension on it.then adjust daspot\choke opener to maintain idle till it warms up
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Offline Ben_Greenberg

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Re: 78 c15 5.7l starting problems
« Reply #27 on: August 31, 2014, 11:08:18 am »
So, the plot thickens. Now the engine wont crank and there is a quick ticking noise when I turn the key. Starter? Any ideas?
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Offline VileZambonie

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Re: 78 c15 5.7l starting problems
« Reply #28 on: August 31, 2014, 03:49:20 pm »
Make sure the battery is fully charged, check your connections at the battery and ensure the ground cable is securely fastened to the engine block.
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,                           ___ 
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              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Ben_Greenberg

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Re: 78 c15 5.7l starting problems
« Reply #29 on: August 31, 2014, 04:34:10 pm »
I will definitely do that! The battery should be good, but connections are worth checking.
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