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Old 07-11-2013, 10:19 AM   #1
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1979 chieftain

I have replaced relay and now the starter. Engine is rolling over and fires when gas is being put in manually. I can't get gas to come through line to carb. I've traced lines and can't find fuel filter but they do go to a silver round thing that looks like a UFO ship. Thinking that's my mechanical fuel pump and is possibly my problem. The rv has been sitting for around 5 years. Any ideas would be greatly appreciated.
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Old 07-11-2013, 10:56 AM   #2
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Timscott, could you take a few mins. and fill out a " Signature Line ". From the "User CP" left hand side, grey box, " Edit Signature " and put in your RV's info year, engine ,etc. your signature will appear below your post and save those looking to provide help from going looking in your personals for the info. Right now I'm assuming 454
A mechanical fuel pump, would be mounted on the engine. Is that where you found yours? And sitting for 5 years you could have holes rusted through the fuel lines in that case the pump won't pull anything from the tank.
If what you found is not on the engine can you post a picture ?
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Old 07-11-2013, 02:56 PM   #3
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Yes if your staring at the front of rv it's on the right side of motor. I traced the lines and discovered that my front tank is disconnected and line is plugged. Would it be best for me to drop tank being it has sat for 5 years and see what the pump looks like.
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Old 07-11-2013, 02:57 PM   #4
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Also my lines are rubber not metal
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Old 07-11-2013, 06:45 PM   #5
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Can you install a temporary line from the inlet side of the mechanical pump , and see if it will pick up fuel from a gas can. Or put a vacuum gauge on the inlet to see if it's got any pull. Could be the internals are shot.
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Old 07-15-2013, 07:36 AM   #6
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Ok I have tried putting the line in a gas jug from inlet side of pump. No gas. I did however manage to get the engine to run for approx 3 seconds before it backfired.
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Old 07-15-2013, 05:32 PM   #7
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99% sure you need a pump , but it would be nice to check with a vacuum gauge before you pull it off.
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