Engine not getting fuel - Team Camaro Tech
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post #1 of 11 (permalink) Old Oct 25th, 14, 10:32 AM Thread Starter
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Chris
 
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Engine not getting fuel

Hi everyone,

Hopefully this is in the correct section.

My car has been sitting in a garage with an empty tank for the past 3 years and I recently did some work to the drivetrain to get it running again. The last time I started the car (before garaging it) it started right up.

Now, it seems like the engine isn't getting any fuel when I tried to start it last night. I put a fresh 3 gallons of gas in the tank, and poured some into the carb too. The engine started up using the gas from the carb and when I pressed the throttle the engine revved for a second before the gas ran out. That makes me think the carb is doing it's job, right?

So it seems that this could be a bad fuel pump, or a clogged filter, does that sound right? I've heard that this could be the fuel filter at the front of the gas tank which got clogged from sitting over the years. Is this easy to replace? Would I have to drain and remove the tank to pull the sending unit? I imagine this filter is the sock type that is on the sending unit?

I would really appreciate any tips or links to articles on how to replace what needs to be replaced, my project is stuck!
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post #2 of 11 (permalink) Old Oct 25th, 14, 11:43 AM
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Re: Engine not getting fuel

It could be any of the above or the rubber hose from the tank to the fuel line could have a leak causing the pump to break suction. Mine started having the same problem after they went to the ethanol fuel. Blew the line out, replaced fuel lines, the pump, even checked the cam eccentric that actuates the pump push rod. Nothing fixed it. Fill the carb manually starts and runs fine. Just replaced the tank with a new one with an in tank pump. If the battery was not dead I would tell you how it works. I probably need to post something on the issue I had with the tank to save someone future problems.

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post #3 of 11 (permalink) Old Oct 25th, 14, 12:29 PM
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Re: Engine not getting fuel

Yeah sounds like a delivery issue. The first step would be to disconnect the rubber line at the tank side fuel rail. The the front line at the fuel pump. The let the hose at the rear hang into a bucket but secure it to the edge of the pail. This will prevent the hose from flailing around and spraying fuel all over the place. Next apply air to the front hose. This will send any sediment or blockage tot he bucket. Once you know you have air passing through the line, reconnect and confirm you got fuel flowing.

The service manual has you disconnect and collect fuel from the carb inlet while cranking, and collect it into a cup. You can count the flow to determine if the pump is working at the correct rate.. That will tell you if the diaphragm on the fuel pump is functioning. But a failure here may also be a sender screen clog issue. You can either blow air through the sender or pull it and inspect for damage.


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post #4 of 11 (permalink) Old Oct 25th, 14, 12:53 PM
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Re: Engine not getting fuel

Also you might want to try:

Remove the fuel line from the carb. Have some one jog the motor and see if gas is coming from the line. If no gas, then it is your fuel pump.

You can then determine if it might also be the in-line fuel filter if you have one. Not sure what type carb you are running.
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post #5 of 11 (permalink) Old Oct 25th, 14, 02:01 PM Thread Starter
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Re: Engine not getting fuel

Thanks, everyone! I think I'll start with the easiest (replace the inline fuel filter) then work my up with all of your suggestions. Sounds like this rubber hose could be an issue as well. I really appreciate your responses.
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post #6 of 11 (permalink) Old Oct 25th, 14, 02:52 PM
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Re: Engine not getting fuel

If it's a Holley you'll need to fill the fuel bowls up before firing it up through the top vent or side fuel level screw.

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post #7 of 11 (permalink) Old Oct 25th, 14, 03:01 PM
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Re: Engine not getting fuel

Quote:
Originally Posted by COPO View Post
If it's a Holley you'll need to fill the fuel bowls up before firing it up through the top vent or side fuel level screw.
Mark is correct on this, and if you find the fuel filter is plugged you might want to look into your rubber parts of your hoses. This ethanol is terrible on some brands of hoses. Had to change every hose on my bass boat due to the lines breaking down from the inside out.

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post #8 of 11 (permalink) Old Oct 25th, 14, 03:15 PM
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Re: Engine not getting fuel

Don't do anything heroic yet. Just do what you did at first.
Many engines that 'run out of gas' with a mechanical fuel pump need to be primed more than once to fire up.

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post #9 of 11 (permalink) Old Oct 25th, 14, 03:35 PM
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Re: Engine not getting fuel

If your pump is mechanical, having them totally dry out will often cause a failure once the pump was in service. The diaphragm cracks. Look there too, cheap and easy fix to replace.

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post #10 of 11 (permalink) Old Oct 28th, 14, 10:49 PM Thread Starter
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Re: Engine not getting fuel

Thank you everyone for all of your replies, I thought I would post a follow up on here in case anyone else ever has this problem. I replaced the fuel pump (very easy job) and she fired right up!
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post #11 of 11 (permalink) Old Oct 28th, 14, 11:57 PM
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Re: Engine not getting fuel

Thank You. We love follow-ups!

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128.79mph 1.428 60'
All with 1960's stuff. (except tires and converter)
+ MT Super Scavenger headers & 3" full exhaust with X pipe. 3700 lbs. with me in it.
1000cfm AED and HD Harold-Lunati SR, 725 lift with shaft rockers too.
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