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Fuel Delivery Problems ?

 
shortbed85
I love my Chevy Chevette!
Posts: 3
Joined: 07/10
Posted: 07/19/10 09:58 PM

My 85 chevy shortbed started cutting out when I would go up hills at about 30mph or so, so I replaced the fuel filter. Then it wouldn't start so I disconnected the fuel line outside the filter and cranked it over. No gas . So I replaced the pump.
Hooked it up , tried starting  it  but no gas at the carb again, no gas smell either.So I unhooked the line outside the filter and cranked and got gas alright..

I checked the filter , looked okay but dry as a bone inside that area for the filter in the carb. I have the paper type filter with the small black plastic seal ? spring ? at the end facing the fuel line as I was told that end seals against the ouside nut and the spring inside sits against the closed end of the filter.       Anybody have any ideas or suggestions? going crazy !
I would really appreciate the help Thanks  

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idrivejunk
I mow my lawn and find Chevys
Posts: 5119
Joined: 12/09
Posted: 07/20/10 04:39 AM

That plastic deal with the spring is called a backflow preventer. Keeps fuel in the carb rather than letting it drain back into the fuel line upon shutdown. You have it installed right. A thorough check of the fuel line for old leaky or stiff pieces of hose is in order. Rubber lines can rot on the inside and plug themselves, or even suck shut during heavy pump suction. Could be a carb float or needle valve problem, too. Last ideas are in the gas tank. A deteriorated filter sock could be intermittently clogging things up, as could the bottom half of an old locking gas cap that someone had to break off. Seen that before but it didn't cause problems.


Food for thought, thats all!  
idrivejunk

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Pontiacman2
Moderator
Posts: 8956
Joined: 09/08
Posted: 07/20/10 05:56 AM

That plastic deal with the spring called a backflow preventer could be sticking.
Remove filter and blow through the inlet of the filter and see if it allows air to pass through it.  
Pontiacman2
Pontiacman2

Professional Hi-performance engine builder

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idrivejunk
I mow my lawn and find Chevys
Posts: 5119
Joined: 12/09
Posted: 07/20/10 01:44 PM

+1  
idrivejunk

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tuffnuff
Moderator
Posts: 7841
Joined: 12/09
Posted: 07/20/10 01:49 PM

+2
Get a new filter, that should cure the problem for you.
Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

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Pontiacman2
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Posts: 8956
Joined: 09/08
Posted: 07/20/10 05:18 PM

Yep.  
Pontiacman2
Pontiacman2

Professional Hi-performance engine builder

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69nova355.
I mow my lawn and find Chevys
Posts: 2560
Joined: 08/09
Posted: 07/20/10 06:56 PM

yup not that much money.  

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shortbed85
I love my Chevy Chevette!
Posts: 3
Joined: 07/10
Posted: 07/21/10 03:45 PM

Thanks for the suggestions , and I will re-inspect my gas lines maybe pump more gas through the lines before the filter..  

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shortbed85
I love my Chevy Chevette!
Posts: 3
Joined: 07/10
Posted: 07/21/10 09:20 PM

I did replace the filter with another "new " filter and the truck started up. Tried blowing thru the old one and no luck..What are the odds of getting a bad filter from the store. LIVE AND LEARN .... Thanks guys  

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idrivejunk
I mow my lawn and find Chevys
Posts: 5119
Joined: 12/09
Posted: 07/21/10 10:31 PM

I hate it when a three dollar part causes a ten dollar headache Mad  
idrivejunk

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Pontiacman2
Moderator
Posts: 8956
Joined: 09/08
Posted: 07/22/10 04:39 AM

+1  
Pontiacman2
Pontiacman2

Professional Hi-performance engine builder

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tuffnuff
Moderator
Posts: 7841
Joined: 12/09
Posted: 07/22/10 05:00 AM

+2
Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

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69nova355.
I mow my lawn and find Chevys
Posts: 2560
Joined: 08/09
Posted: 07/22/10 06:43 AM

At least its fixed.  

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Pontiacman2
Moderator
Posts: 8956
Joined: 09/08
Posted: 07/22/10 07:40 AM

+1 nova
The odds of getting a bad fuel filter from the store is actually more common then one would think.  
Pontiacman2
Pontiacman2

Professional Hi-performance engine builder

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tuffnuff
Moderator
Posts: 7841
Joined: 12/09
Posted: 07/22/10 08:50 AM

+2
EVERYTHING, and I mean everything needs to be looked over and checked,,,
and parts are getting worse instead of better.
Why,,, no more or very little human inspection or quality control.
So now robots get blamed.
Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

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