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Fuel Delivery Problems ?

  
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Fuel Delivery Problems ?

 
shortbed85 shortbed85
New User | Posts: 3 | Joined: 07/10
Posted: 07/19/10
10:58 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  

idrivejunk idrivejunk
Addict | Posts: 5117 | Joined: 12/09
Posted: 07/20/10
05:39 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

Pontiacman2 Pontiacman2
Moderator | Posts: 8956 | Joined: 09/08
Posted: 07/20/10
06:56 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

idrivejunk idrivejunk
Addict | Posts: 5117 | Joined: 12/09
Posted: 07/20/10
02:44 PM

+1  
idrivejunk

tuffnuff tuffnuff
Moderator | Posts: 7828 | Joined: 12/09
Posted: 07/20/10
02:49 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

Pontiacman2 Pontiacman2
Moderator | Posts: 8956 | Joined: 09/08
Posted: 07/20/10
06:18 PM

Yep.  
Pontiacman2
Pontiacman2

Professional Hi-performance engine builder

69nova355. 69nova355.
Addict | Posts: 2560 | Joined: 08/09
Posted: 07/20/10
07:56 PM

yup not that much money.  

shortbed85 shortbed85
New User | Posts: 3 | Joined: 07/10
Posted: 07/21/10
04:45 PM

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

shortbed85 shortbed85
New User | Posts: 3 | Joined: 07/10
Posted: 07/21/10
10:20 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  

idrivejunk idrivejunk
Addict | Posts: 5117 | Joined: 12/09
Posted: 07/21/10
11:31 PM

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

Pontiacman2 Pontiacman2
Moderator | Posts: 8956 | Joined: 09/08
Posted: 07/22/10
05:39 AM

+1  
Pontiacman2
Pontiacman2

Professional Hi-performance engine builder

tuffnuff tuffnuff
Moderator | Posts: 7828 | Joined: 12/09
Posted: 07/22/10
06:00 AM

+2
Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

69nova355. 69nova355.
Addict | Posts: 2560 | Joined: 08/09
Posted: 07/22/10
07:43 AM

At least its fixed.  

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

tuffnuff tuffnuff
Moderator | Posts: 7828 | Joined: 12/09
Posted: 07/22/10
09:50 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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